- For other uses of the name "Alex", see Alex.
- For other uses of Supergirl, see Supergirl (disambiguation).
- "It is our job to take risks. We run into the line of fire. We face enemies that no one on this planet has the courage to."
- —Alex Danvers to J'onn J'onzz[src]
Dr. Alexandra "Alex" Danvers (born 1989) is a bio-engineer and former director of the D.E.O. She is the daughter of Eliza Danvers and the late Jeremiah Danvers, the adoptive sister of Kara Danvers, the ex-fiancée of Maggie Sawyer, and the girlfriend of Kelly Olsen. She is also close friends with J'onn J'onzz and a good friend of James Olsen, Lena Luthor, Samantha Arias, Nia Nal, Winn Schott and Querl Dox/Brainiac-5.
- 1 Biography
- 1.1 Original multiverse
- 1.1.1 Early life
- 1.1.2 Troubled teen
- 1.1.3 Working for the D.E.O.
- 1.1.4 Dinner with Max
- 1.1.5 Saving Kara
- 1.1.6 Killing Astra and recognition of Kara
- 1.1.7 Arrest
- 1.1.8 Myriad
- 1.1.9 Superman's arrival
- 1.1.10 Meeting with Maggie Sawyer
- 1.1.11 Coming out
- 1.1.12 Relationship with Maggie
- 1.1.13 Return and betrayal
- 1.1.14 Kidnapped
- 1.1.15 Acting leader
- 1.1.16 Losing Maggie
- 1.1.17 Crisis on Earth-X
- 1.1.18 The rise of Reign
- 1.1.19 Bonding with Ruby
- 1.1.20 Becoming the new director of the D.E.O.
- 1.1.21 Losing her memories
- 1.1.22 Regaining her memories
- 1.1.23 Battle at Shelley Island
- 1.1.24 Conflict with Leviathan
- 1.1.25 Anti-Monitor Crisis
- 1.2 New multiverse
- 1.1 Original multiverse
- 2 Personality
- 3 Abilities
- 4 Equipment
- 5 Appearances
- 5.1 Supergirl
- 5.2 DC's Legends of Tomorrow
- 5.3 The Flash
- 5.4 Arrow
- 5.5 Comics
- 6 Gallery
- 7 Trivia
- 8 Behind the scenes
- 9 References
Alex was born in 1989 in Midvale to her parents; scientists Jeremiah and Eliza Danvers. When she was six years old, Alex and her parents visited Nagano, Japan for the summer. Alex grew homesick so one night, a local village girl helped her sneak down to one of the temples. There, Alex wrote down a wish and placed the paper in a crack in the wall in the hopes that it would come true. The girl then taught Alex a rhyme, "yubikiri genman, uso tsuitara," which means "pinky swear." When she was eight years old, Alex met and became best friends with Josie.
Since early childhood, Alex displayed a gifted intellect and brilliant attitude towards science. As a teenager, she enrolled in Midvale Junior High, obtaining remarkable results. The star of her family, when Kara arrived in 2003, Alex was jealous of her newly-adoptive sister due to her abilities and dismayed at the fact that Kara easily excelled at math and science. Thus, she was secretly happy when Kara decided not to use her powers.
At first resentful of that "strange girl" who came into her life for constantly following her around at school and embarrassing her in front of her friends, Alex soon began to warm up to Kara and acted as her big sister, often comforting her when she was afraid or sad.
One night, Kara took Alex flying, in spite of the latter's initial protests. During the adventure, Alex told Kara the story about her summer trip to Nagano and taught her sister the rhyme which the girl from the village taught her. Unfortunately, due to that night, the D.E.O. subsequently found out about Kara. They forced Alex's father to work for them in exchange for not taking Kara away. One year later, Jeremiah "died" protecting a martian from the D.E.O.'s ruthless director Hank Henshaw, but Eliza told Alex and Kara that he was killed in a plane crash.
Alex attended Midvale High School, during which her relationship with Kara became frosty as she blamed the latter for her father's death and resented having to be Kara's "earthly ambassador". Alex completely put her focus into her studies and social life, becoming a popular girl alongside Josie. In high school, she met and befriended Vicki Donahue, who also became a member of her clique.
In 2007 during her junior year, Alex began failing calculus, but was too embarrassed to tell her family or friends. Alex's classmate, Kenny Li, then offered to tutor her in secret, which she accepted. Alex and Kenny would study in the nearby woods and over time, became close friends. However, Alex never acknowledged Kenny outside of their tutoring sessions, always dismissing him as "Kara's friend", which she would grow to regret.
When Kenny was murdered, Alex and Kara worked together to investigate his death, in which they discovered that Kenny learned of Josie's secret affair with their history teacher, Mr. Bernard. Despite Josie's protests, Alex reported this to the authorities. While she and Kara were walking home that night, they were almost killed by a speeding car, whom they believed to be Mr. Bernard. Shortly after though, Alex found out that Josie was with Mr. Bernard at the time of the attack, meaning he wasn't the culprit. She rushed to school and spoke to Sheriff Ronald Collins, who turned out to be the real killer and he held her at gunpoint. When Kara tried to contact her, Alex managed to reveal she was at Midvale High before Collins took her phone. Collins took Alex to the boiler room, where he planned to kill her as well, but Alex showed no fear, knowing that Kara was coming for her. At that moment, Kara arrived and knocked out Collins, saving Alex's life and making the pair's relationship whole. Later following Collins' arrest, Alex's friendship with Josie fell apart and she was cast out of the popular clique, but ultimately didn't mind much. That afternoon as they ate lunch together for the first time, Kara revealed to Alex that Kenny had a picture of her flying, but kept it a secret.
Despite Alex's fallout with Josie and the popular clique, her friendship with Vicki persisted for some time. Alex loved sleeping over at Vicki's house, in which they would share a bed. However, Alex soon started to develop feelings for Vicki, much to her confusion and alarm. As a result, she began subconsciously pushing Vicki away by starting fights with her over almost everything, even if it was stupid or insignificant, until the pair drifted apart. This memory hurt Alex so much that she repressed it for years, consequently not coming out as a lesbian until much later in life.
Over the years, the bond between Alex and Kara became so strong that neither of them can imagine their lives without the other.
After graduation, Alex pursued an MD/PhD at National City University. In medical school, she had a boyfriend, Capraro, who would write poems about him and Alex fighting and they allegedly broke up because of it. Alex also conducted research in genetic engineering at Stanford.
Despite her intelligence and academic results, Alex grew up a troubled young adult who used hard-partying and heavy drinking to cope with her insecurities and troubles, including her latent homosexuality and the loss of her father. This escalated to the point where Alex began falling behind in school and was placed on academic probation. In 2012, after a night of drinking and clubbing led to a DUI and her arrest, Alex was visited by "Hank Henshaw" in jail. He offered her a position at the D.E.O., assuring Alex that she is special just like Kara and pointing out that she owed it to her father to be the person "Hank" knew she could be.
Working for the D.E.O.
Alex had to go through a full year of training before being allowed to work in the field. Despite her close connection to Kara being one of the main reasons the D.E.O. hired her, Alex soon proved herself as one of the best agents, quickly becoming "Hank"'s second-in-command.
Alex frequently struggled with dating and romance, unconsciously suppressing any feelings she developed towards other women. As a result, Alex soon began to devote nearly all of her time towards her work.
In 2015, Alex had to attend a conference in Geneva but Flight 237, on which she was traveling, was sabotaged by Vartox in an attempt to kill her and other D.E.O. agents on board. Though the plane was saved by Kara from crashing, Alex later berated her sister for doing so, angry that she had revealed herself to the world, and now there is no turning back. Kara was later captured by the D.E.O. and taken back to their base, where Alex revealed her identity as a D.E.O. agent. After Kara was defeated and almost killed by Vartox, Alex rescued her. revealing that the only way that the Fort Rozz escapees could get back at Kara's mother was through her now. She later went to Kara's apartment, apologetically explaining herself, and encouraging Kara to be a hero. The two then went to the D.E.O. base, where they convinced Director "Hank Henshaw" to let Kara defeat Vartox.
A week later, Alex along with the rest of the D.E.O., tested the limits of Kara's abilities, firing missiles into the sky at her. Afterward, Alex debated with Kara over the necessity of the tests before Kara had to leave to stop a fire raging at National City Port. Days later, the D.E.O. investigated the theft and murder of a security guard on Plastino Chemicals factory, with Alex calling Supergirl to assist in the investigation. Later at the D.E.O. base in the training room, Alex defeated Kara in a sparring match with the assistance of Kryptonite emitters in the room, in an attempt to prepare Kara for anything she might face. She later came to Kara's apartment and questioned her sister as to whether telling James and Winn her secret identity was a good idea, soon after apologizing to Kara, regretting how she handled things earlier however, Alex was soon called by the D.E.O. who needed her back at the base, telling Kara that she'd call her.
At the D.E.O., Alex along with "Henshaw" and Agent Hartmann came to the conclusion that the Hellgrammite was eating the DDT he had been stealing, as the government had been destroying remaining stockpiles, and his food source was shrinking. Later, the D.E.O. set a trap for the Hellgrammite with a truck carrying tanks of DDT, while Alex and Henshaw along with several other D.E.O. agents followed it in another vehicle. The Hellgrammite abducted Alex and takes her to General Astra, who revealed her true identity after she mistaking her for Alura. Alex was later found by Kara who had tracked her down with her super hearing. A fight between Kara and Astra ensued, and Hellgrammite attacked Alex, who tried for radio contact D.E.O., who was able to overcome him by forcing the stinger he protruded from his hand into his heart. Later at the D.E.O. base, Alex was asked by Kara to train her, with Alex promising to make Kara better than herself. Alex then showed Kara a room that had been setup containing an Artificial Intelligence program of Alura that had been sent with her pod. Leaving Kara to talk to it, she thanked "Henshaw" for helping her set up the room.
When Reactron comes to National City with the intention to kill Supergirl as he wanted Superman to suffer and lose everything, Alex decide to help her sister to fight him despite he is not an alien and so none of D.E.O. business. Her stubbornness and determination makes that even "Hank Henshaw" decides to help them.
On Thanksgiving, Kara and Alex are visited by their mother Eliza, with whom Alex had a strained relationship because. since Kara arrived, Eliza expected Alex to protect her, often leading to a fight when she didn't. Alex admitted to her mother that she works at the D.E.O. leading Eliza to told she and Kara how Jeremiah was forced to work for the D.E.O. by Hank Henshaw to protect Kara but was killed in action; never knowing how or why he died. Alex had trouble working with "Hank" after this and enlists the help of Winn to hack into the D.E.O. mainframe to find out what really happened to her father only to discover that Jeremiah Danvers went missing on a mission with Henshaw in South America. Alex and Kara begins to mistrust the director, until an earthquake traps him and Alex at the D.E.O. headquarters with a powerful alien escapee and, while fighting side by side, she found out he is not Hank Henshaw, but a martian named J'onn J'onzz and that her father died protecting him from the real Hank. She and J'onn later disclosed this secret even to Kara.
Dinner with Max
After a Kryptonians attack to Lord Technologies Alex, who over previous investigations has become close with the ambiguous millionaire Maxwell Lord, accepted his invitation to a dinner to interrogate him. After she learned that the appetizer they're eating is actually snail eggs (which cost $100 a spoon) she spits them out in a napkin then starts to question him about what were the aliens looking for in his laboratory. Max recalls that Supergirl is also an alien, Alex replied that Supergirl saves lives. Max tells her that she too, saves lives, and asks her what's her real relation to Supergirl, Alex responds him that she works for her organization and she's a reliable employee. Finally Max tells her that they have conducted an inventory in the laboratory and found that the aliens did not take anything, then he proposes a toast to "Alex Danvers, a real hero". Unbeknownst to her, Maxwell planted a recording device in Alex's purse and, later that night, when she goes to Kara's apartment, he overhears their conversation, confirming his suspicions that they're sisters.
After the appearance of Bizarro, Alex goes to Max, saying she knew that he's responsible. Max indirectly confesses his experiments, but threatens Alex to not reveal his operations, insinuating that he knows her family; however Alex orders D.E.O. agents to arrest him and, when he threatened to reveal Supergirl's secret identity, she slams him on a desk and stated no one would hear him, then she brought him to the D.E.O.; J'onn berates Alex for bringing him in, as Max is not an alien, but Alex counters he of all people should understand her desire to protect her family.
When Kara is attacked by the Black Mercy, and plunged into "the perfect dream", in which she appeared on Krypton, Astra came to Alex and told her how to help Kara. Alex with the help of Max Lord, who invented a special helmet, was plunged into Kara's mind to force her to give up illusions.
Alex goes through the corridors and find the room where the House of El sits with Kara, who could not remember Alex. She tries to explain to her what is really going on, but she does not believe her and let her being captured and sentenced to the to capital punishment - exile in the Phantom Zone. Alex tells Kara that if she doesn't wake up, they both remain in her mind, until Black Marcy kill them both, while Zor-El tells Kara that once Alex will go, they will be happy again. Alex, weeping, says Kara that she understands how much she has lost and how much she knows Kara wanted to go home, but this is only an illusion. An earthquake begins, Kara realizes the truth, says goodbye to her parents and reach for Alex's hand just in time to avoid being swallowed by a sinkhole. As she wakes up with an expressionless look, Kara demands to know who did this to her, and Alex responds that it was Non.
Killing Astra and recognition of Kara
When Kryptonians gathered to start the next stage of their plan to conquer the Earth, they decided to use the Lord Technologies satellites and connect them to their device. Alex shots Astra from an helicopter and distracts her from the activation of the device. A fight between them ensued. Alex insisted she didn't want to fight Astra, knowing she still loves her niece because she had plenty of opportunities to kill Kara and Alex, but she didn't. Alex offers Astra a chance to surrender but they were interrupted by J'onn, who began to fight with her. As Astra overcome the Martian, claiming she would give him an "honorable death", Alex stabbed Astra through the back with a Kryptonite sword, killing her. When Kara arrived, J'onn covered for Alex, claiming that he killed Astra because he could not see any other way to defeat her.
Later, Alex asked J'onn why he lied about Astra's death and he explained he didn't want to change the fact that she is Kara's hero. In the aftermath, Alex, Winn, and James celebrated with Kara at her apartment, comforting her after her ordeal.
Alex struggled with keeping the secret from Kara, at one point drafting an email to tell her the truth about Astra, unable to do so face-to-face. However, she couldn't bring herself to send it.
After Alex helped her sister take down Master Jailer, Kara quit working with the D.E.O. because she didn't know how to work with J'onn after what he had done to Astra. Upon defeating Indigo though, Kara returned to the D.E.O., telling J'onn and Alex that she was ready to work with them again because it's better for the world. However, Alex could not stand it anymore and began to tell Kara the truth about Astra. J'onn tried to stop her, but Alex continued, revealing that she saw Astra about to kill J'onn, who was defenseless, so she reacted and killed her to save him. Crying, Alex confessed that she allowed J'onn to take the blame because she was afraid of losing her sister. Kara embraces Alex as she breaks down, forgiving her.
After J'onn is forced to reveal his Martian identity to save Alex from Kara (who was under the influence of Red Kryptonite) he was arrested and questioned by Colonel Harper, along with Major Lucy Lane, to find out how he got into D.E.O. and what happened to the real Hank Henshaw. He explained to them that he did not kill Jeremiah Danvers, but they were skeptical about it. J'onn told them about what happened 10 years ago in Peru, about how he met Jeremiah Danvers and how Hank Henshaw tried to kill him. But Harper does not believe him and sends in Project Cadmus both J'onn and Alex, which is accused of complicity and treason as Lucy realized that she knew about J'onn. To save them, Kara is forced to reveal her secret to Lucy, and then asks her to help rescue them. After intercepting the truck in which they are taken to Cadmus, they attack it on board of a pair of motorcycles and set J'onn and Alex free. The martian also sees in Harper's consciousness that Alex's father is still alive and in Cadmus. Alex and J'onn are nevertheless forced to leave National City as fugitives.
After they learn about what is happening in National City, Alex and J'onn went back there to help Kara. However, they are attacked by Indigo, who kidnapped Alex so that Non can later put her under the control of Myriad, forcing her to fight Kara with the intention to kill her. She almost did it, but was stopped by her mother, who told her that she believed in her, snapping her out of the mind control.
Later, Alex told her mother that her father is alive in a secret laboratory, where they will go to save him, after sorted out with Non who, meanwhile, strengthened Myriad's power to kill all the people on Earth. To stop him, Kara decided to carry Fort Rozz, the source of Myriad, into space, however, there she loses consciousness and is rescued by Alex, who drives her back to Earth thanks to the pod on which she arrived twelve years prior. She was later present at Kara's apartment during the celebratory dinner they were having. Thought it was interrupted by a pod flying in the sky catching their attention, causing Kara and J'onn to leave to check it out.
When Superman flew to National City, Alex immediately noticed that there's some tension between him and J'onn, so she tried to find out what happened and discovered that Superman has once helped the D.E.O. uncover an alien asteroid, composed of an emerald-green Kryptonian xenomineral whose radiations weakened Kryptonian's physiology and, despite he asked J'onn to destroy it, the martian refused, deciding to keep the meteorite as a means of protection against other Kryptonians, enraging Superman and leading to the pair falling out. The next day, despite having survived two previous attempts to her life, Lena Luthor, attends to the ceremony to renaming the Luthor Corp into "L-Corp", however, at that moment she began to make her speech, several explosions take place on the site forcing her to flee to a safe place, but John Corben dressed as a policeman, stops her and tries to kill her at the behest of Lex Luthor. Alex intervened and fights him but was ultimately held at gunpoint and taken as a hostage by the hitman; however before he could leave, Lena shot him in the back freeing her.
After Corben resurfaced as the Kryptonite-powered cyborg Metallo, Alex and Winn realized that behind the sample of D.E.O.'s stock of Kryptonite stolen four months ago there is a traitor: J. McGill, who Alex instructed to prepare trucks for transportation of Kryptonite, to caught him red-handed at the time of the abduction. However, before she can arrest him, the agents of Cadmus shot him and knocked down Alex. When she awakes, Alex is approached by the mysterious "Doctor" of Cadmus, who said that if she does not want to join them, she will be killed, however Alex was able to fend off the agents and, after a fight broke out between them, she is saved by Kara. Later, Supergirl and Alex (one in an anti-Kryptonite device and the other in her special exosuit) fought Metallo and together were able to overcome the cyborg, who is ultimately stabbed him in the chest with a piece of pipe by Alex, while Kara held him.
Meeting with Maggie Sawyer
After the assassination attempt on the President, Alex found Detective Sawyer collecting evidence at the airport and asks her what she was doing in her crime scene, Maggie pointed out that she was from NCPD's Science Police and her work is to investigate everything regarding aliens. Alex tried to throw her off the investigation, but Maggie proved herself as the other woman's intellectual match, culminating in an exchange of banter between the two of them that finally ended with Alex sternly asserting herself. The two would later meet again when Alex led her team into a warehouse raid in search of a supposed rogue Kryptonian, in where Maggie was already there, thanks to her street contacts, and casing the edifice from within; Alex's armed gear and team allowed Maggie to discern that the former was in fact D.E.O., much to the agent's chagrin. Later, after being accosted by Kara for going after the kryptonian without her as backup, Alex is invited by Maggie to Al's Dive Bar and they tried to figure out where is Mon-El, since they assumed that he is the one who attacked the president. Upon arriving at the bar, the waitress, Darla, handed out two drinks for the pair of women (ordered by Maggie) before commenting the cop "moving on"; confused, Alex inquires Sawyer if the waitress was a Roltikkon, to which Maggie confirms, along with the fact that she and Darla were formerly a couple, making Alex realize that she was just mistaken by the alien as Maggie's new flame. The next day, Alex, along with Maggie, attended President's Marsdin signing decree on the alien embassy act. During the ceremony Scorcher tried again to assassinate the President; they tried to stop her, but she ran away kidnapping Maggie an bringing her to a factory stock. Later Supergirl and Alex rescued the detective, who helped them fighting the alien terrorist. After a brief medical check-up at the D.E.O. Maggie thanked Alex for having saved her and then left, saying she had a date with a girl.
A few days later Maggie brought Alex to a crime scene, where they found the corpse of an alien and, according to the bruises on his fists, they concluded that before his death, he fought and was killed by another alien. Later, they went to their prime suspect's home, only to see him being kidnapped by few unidentified people in a van. In the evening, they infiltrated an underground National City fight club hosted by Roulette, in which the aliens are forced to fight to the death for the money. In the first battle, M'gann M'orzz fought the kidnapped alien Quill and is about to kill him, when Supergirl showed up, and Alex and Maggie shot into the air to disperse all those present.
Later at the D.E.O., Kara and Alex told J'onn they have seen M'gann in the underground fight club and, after both the martians are kidnapped, Alex informed Kara and goes to place where the fighting took place only to finds that there is nothing anymore. However, after Supergirl found out the new address in which Roulette was to host the battle, Alex and Maggie organized a police riot and arrested the woman who, anyway, managed to get released thank to her friends in high places. Before she get into her limousine, Alex told Roulette that her time will come and, after that, she invited Maggie to have a drink together, but the detective said she couldn't and left with her girlfriend. Seeing the couple walking away made Alex feel an odd jealousy.
Sometime later, Alex and Maggie were playing pool in the bar and the latter told Alex that she broke up with her girlfriend. Alex tried to cheer her up and, after they went to the site of a diamond robbery, Alex invited Maggie to go somewhere to hang out. Interpreting it as Alex asking her out, Maggie told her that she didn't know Alex was "into girls." A shocked Alex begins to deny it, but Maggie says that some gay women she knew had done the same thing, prompting her to leave. Beginning to realize her homosexuality for the first time in her life, Alex went to Kara's apartment and told her that she was confused about something, but seeing Kara upset, she immediately asked her what happened and the latter responds that Mon-El did not perceive the work seriously. Alex advised Kara to let Mon-El find what he is interested in. After that, Kara asked Alex if she was going to say something, but before she could speak, Lena came in and told Kara that she wanted to meet Supergirl.
That night, Alex found Maggie at Al's Dive Bar, she apologized for how she behaved insolently when considered that she was gay, but Alex said that she could not stop thinking about it and that in the fact could be the truth.
The next day, Maggie advised Alex to come out to her family and promised that immediately after that, they'll go to have a drink together. Later at the D.E.O. she and Winn showed J'onn a video of the Thorul Arctic Research Station in Norway, in which one of the scientists asks for help, Alex and J'onn go there only to find all the scientists were dead except for Rudy Jones, whom they brought back to National City.
The following morning, Alex asked Kara to talk in private, and they went out into the street. There Alex admitted to Kara that she had developed feelings for Maggie and that she is gay. Despite at first being shaken, later in her apartment, Kara told Alex, who thought that Kara was disappointed in her, that she could never be disappointed in her and that she's totally okay with it, that Alex is a lesbian. Then she told Alex, she understands how it feels to keep part of yourself locked away, and confirmed her support for Alex and her feelings towards Maggie. In the evening, Alex comes to the bar came into the bar asking M'gann for help as J'onn need a blood transfusion following his clash with Parasite.
The next night, Alex came back to the bar telling Maggie that she has come out to Kara, then kissed her. However, after the kiss, Maggie said to Alex that she wants Alex to experience being with a woman for herself, and does not want to have a relationship with someone who has just come out, as that those relationships never really have good endings. After these words, Alex exited the bar with a disappointed face; feeling heartbroken and humiliated, and she went back to her apartment, where she was visited by Kara, who hugged her and began to comfort her and told Alex, that she's proud of her.
Relationship with Maggie
A few days later Alex, Kara, Winn and James sat in Al's Dive Bar, discussing the new vigilante, when Maggie came in and asked Alex how she was doing, the latter pretended not to be offended by what happened during their last encounter and said that she was fine. The next day, Alex discovered from Winn that James is the Guardian and agreed not to tell Kara, then she approached Maggie, who had gained a warrant for the arrest of the Guardian, and asked her to stop the hunt for the vigilante, telling her that they are not looking for him, without revealing any further details. Maggie agreed as they're friends, but Alex told her that they are not because she was hurt that Maggie does not want to be with her. Later Alex returned to the D.E.O. and asked J'onn if there are any news from Kara, he said to wait before starting to alarm, then, suddenly J'onn aimed a gun to one of the agents because he sees him as a White Martian in a vivid hallucination, after Alex stops him, he asked her to do some medical tests on him, from which it results in his blood cells changing.
After Kara fled from Cadmus and returned to the D.E.O., she told Alex that she saw her father and that he helped them escape so, along with several agents, Alex went to the secret base of Cadmus finding it completely empty. Later that night, at the celebration party for Kara and Mon-El's return in Kara's apartment, Maggie told Alex that she cherishes their friendship and hopes that they will be able to become friends, because she did not want to imagine her life without her. Alex agreed to meet her and play pool. Back at the apartment, Alex realized that Kara had overheard them, so she said that she and Maggie have chose to remain friends. Then Kara promised her that they will find Jeremiah.
During the Thanksgiving dinner at Kara's apartment, Alex tried to come out to her mother but was stopped by the opening of a breach.
After Mon-El is infected by the Medusa virus, while working to find a cure, Eliza asked Alex what she wanted to tell her, and she finally found the courage to come out to her mother, saying that she was afraid to disappoint her, to which Eliza replied she could never be and embraced her.
Alex and Eliza, found that to spread the virus on National City Cadmus needs a substance produced by L-Corp, so Alex calls Maggie and asks her to send all their available troops to the company headquarters.
However, there Cyborg Superman hurt Maggie whit his cybernetic laser eyes, and the woman is delivered to the D.E.O., where Alex checked her wound, then informed her that she had speak with her mother, and thanked her for having opened her eyes.
The next evening, Maggie visited Alex at her home, confessing that she had feelings for her, and the two shared a kiss, thus beginning their relationship.
Alex began to spend more time with Maggie as they explored their new relationship. When Kara had a lead on a missing person named Izzy, Kara insisted that she didn't need her help and that she could handle it on her own. However, she had gone missing and Alex tracked her by her last location and found that she had been taken to the planet Maaldoria where she wouldn't have her powers. Alex then became hysterical and blamed herself as she was distracted by her new relationship and didn't protect her sister. When Maggie arrived, Alex told her that she couldn't see her as Supergirl had gone missing and that it was her fault. Maggie was confused by how she was acting but Alex told her that she had to focus on getting Supergirl back and Maggie couldn't help her.
When Winn helped activate the portal to Maaldoria, Alex led a strike team to the fortress and arrived just in time to find that Kara and Mon-El were leading the other captured humans to safety. They headed back for the portal but an attack ship was heading for them and Izzy was grabbed by a Maaldorian. Alex then threw a yellow sunblast grenade which gave Kara her powers back and she used them to destroy the ship and save Izzy. They then all returned to Earth. Later, Maggie visited Alex and told her that she was aware that her sister Kara was Supergirl as Kara was the only one that Alex could worry about as much as she did. Maggie also told Alex that she wasn't going anywhere and that she deserved to be happy.
After M'gann suffered from a telekinetic attack from the White Martians that left her in a catatonic state, Alex took care of her and informed J'onn that the former was slowly dying. Although J'onn was hesitant about helping her because of his old hatred for her kind, after Alex talked to him he decided to save M'gann's life through the Martian Bond. Meanwhile, Alex and Maggie helped Supergirl in her investigations to track down Livewire, strengthening both their professional and personal relationship.
When Valentine's Day arrives, Alex learns that Maggie dislikes the holiday but is unsure why.
Return and betrayal
During a mission Kara rescued Jeremiah Danvers and he was reunited with his family, happy to be reunited Alex introduced her father to Maggie revealing her sexuality. Jeremiah accepted, but when Mon-El was suspicious of Jeremiah, it caused tension between Kara and Alex. It turned out though that Mon-El's suspicions was right as Jeremiah's rescue was part of Cadmus's plan as he was working with them. He stole the list of all known aliens, Alex, Kara and Mon-El confronted them, but Jeremiah escaped when Alex couldn't shoot him. J'onn decided to test Alex and transformed into Jeremiah, and asked for help. When Alex decided to help him, J'onn transformed back and had Alex suspended. Alex though refused this as she and Maggie tracked down a member of Cadmus about to kidnap an Alien. Alex and Maggie parted ways with Alex confronting her father and Lillian Luthor.
Prior to entering the base, Alex had rigged explosives around the area and had Jeremiah make a choice, her and the aliens or Cadmus, he chose to side with his daughter and the father-daughter duo worked together, but Jeremiah was knocked out and taken. Alex decided to stop a ship that was planned to leave Earth with all the aliens, in which Kara arrived and it was through Alex that Kara was able to stop the ship from leaving Earth.
Despite losing their father again, Kara and Alex's relationship was still strong, but Alex found that Maggie and Kara had trouble due to Kara's inability to wait. Maggie made a point in which Kara's actions in charging in and stopping robbers, have caused criminals to use the Supergirl defense in which her heavy handed tactics causes criminals to escape justice. When Alex tried to make peace between the two, she was kidnapped by Rick Malverne and was imprisoned. Throughout her time in the prison she told Kara and Maggie not to give in, and when she was almost killed, Alex was able to keep herself alive long enough to be rescued. Before Rick's mind was erased by J'onn, she punched him and told J'onn to make sure he remembered that.
When Queen Rhea of Daxam, made her plans to take over Earth, J'onn attempted to stop her, but she put him in a never ending nightmare, leaving Alex in charge of the D.E.O., in which she worked with Kara and Maggie to stop Rhea. When Lillian Luthor offers assistance, Alex and everyone else defiantly refuse due to fighting with her and C.A.D.M.U.S. for months but eventually agrees after Kara calls for her. When the President ordered Alex to fire a cannon at the Daxamite mother-ship, Alex was forced to make the tough call and was hesitant to fire the cannon when it was ready due to Kara being inside it. Unfortunately a mind controlled Superman destroyed it.
Alex and Maggie witnessed the battle between Superman and Kara in which the latter won. Alex took both of them to the Fortress of Solitude. After the final battle with the Daxamites, Alex tried to console Kara who was forced to send Mon-El away due to poisoning the atmosphere with lead to send the Daxamites running. Kara gave Alex some advice, which caused Alex to propose to Maggie who agreed.
Alex and Maggie's relationship grew stronger, with their wedding getting closer. Alex convinces Maggie to confront her past and led her to finally confronting her estranged father, but during that time, Alex discovered that Maggie didn't want kids, something that Alex has always wanted. Alex attempted to continue the relationship, but upon seeing the relationship between Samantha and Ruby Arias, she confessed to Kara, her desire to have children. Maggie, soon realized what was happening and told Alex, that she has to say it, in which Alex ended the relationship with Maggie. The two spent one more night together and the pair parted ways amicably, with Maggie telling Alex that she was going to be a great mom. The heartbreak that Alex suffered caused Kara to take her back to Midvale, in which the two ended up having an argument. The next day, the pair made up, and returned to National City, in which they found a ship which contained Mon-El.
Crisis on Earth-X
After having dealt with a Dominator, Alex and Kara talked about Mon-El in which Alex discovered an invitation to Barry Allen and Iris West's wedding, though hesitant at first, Kara decided to go with Alex. Alex went to the rehearsal dinner, in which she started drinking and was soon joined by Sara Lance. Alex mentioned to Sara her sexuality and how she had to cancel her wedding, and the two continued to drink before making out outside Jitters. The two ended up at a hotel room in which the pair had sex, three times. Alex wakes up to discover Sara next to her and sneaks out. Alex arrived to the wedding where she and Kara talked until Sara arrived who asked if Alex was okay after falling out of bed, thus revealing their interaction to Kara. Kara told Alex that it was okay and mentioned how Sara was an assassin, Alex calls her a "sassy assassin". Alex and Kara entered the church and watched the wedding, but before the ceremony could continue, the priest was killed by Overgirl and the invading Nazi forces of Earth-X. Alex and Sara teamed up and took down many Nazis as well as knocking out Prometheus.
After imprisoning Prometheus in S.T.A.R. Labs, they learn that he's Tommy Merlyn. While Oliver conversed with him, Alex joined the other heroes in the Cortex to discuss recent events. The Legends suggest that Tommy was an anachronism, yet Alex agreed with Iris' argument over why Nazis would target her wedding, stating that time-displaced Nazis would target military or law enforcement. Ultimately, Team Flash discerned their attackers were from another Earth and Harry Wells revealed the existence of a fifty-third Earth, Earth-X.
Later, Alex runs into Sara and was nervous, though Sara didn't think too much of it. Alex then speaks with Kara and admitted that she doesn't know what to feel due to her sleeping with Sara and wondered if she made the right choice when it came to Maggie. Kara tries to console her but Alex believed that she made a mistake when it came to sleeping with Sara and breaking up with Maggie.
When Kara, Oliver and Barry return from a confrontation with the Nazis at a science lab, they also produced a kryptonite arrow with blood on it, explaining that the Nazis leaders were doppelgangers of Kara and Oliver. A confused Alex inquired how Kara could have a doppelganger. Harry pointed that if there were 53 Earths, there could also be 53 Kryptons. Alex quickly analyzed the blood and determined that it contained high amounts of solar radiation, giving them the means to track Overgirl.
When the team had discovered Overgirl's location, Alex and Sara teamed up again in which Sara asked if that was okay, Alex agreed. Alex battled along with the others and seemed to be winning until the arrival of Metallo who quickly took down Supergirl and Firestorm with ease, and Alex and the others were knocked out. Once they awoke, they were imprisoned and discovered that Overgirl was dying from excess solar radiation and that they planned to cut out Kara's heart and put it into Overgirl's. Alex warned against harming her sister, to which Overgirl reacted with amusement, stating that her own sister tried to kill her. Metallo then knocked them all out again in which they were all taken to Earth-X except Kara.
After awaking on Earth-X, Alex and the group met Ray Terrill who revealed he was in prison because he loved the wrong person, this worried both Alex and Sara due to their sexuality. Suddenly they met the Earth-X version of Sara's father, Quentin Lance who planned to have them executed along with Ray. When they tried to escape they were shocked by the collars they were wearing and were almost executed until the arrival of Leo Snart. Leo freed them and helped them escape when he freed Ray which allowed him to use his powers. They escaped to the Freedom Fighters, who were led by the Earth-X version of Winn Schott, and he refused to allow them to go to the breach as he planned to have it destroyed. Alex tried to convince him due to knowing his Earth-38 counterpart, but he still refused. Alex attempted to find a gun so that she could try to rescue Kara, but Sara stopped her by mentioning that she is part of her team now. Sara learned about Maggie and talked to Alex about her own Maggie, Nyssa. Sara then told Alex that she should follow her instincts and that her reasons behind the break-up were valid. Eventually Winn was convinced by Ray and Leo to attempt to get to the portal, in which Alex and Sara teamed up against the Nazi's. They succeed in taking the site, but during the conflict Martin Stein got injured.
Alex and the rest of the team along with Ray and Leo arrive back on Earth-1, where with the help of the Legends, Team Flash and Team Arrow were able to rescue Kara and escape to the Waverider. Alex was reunited with Kara, in which Kara joked about how their plan to come to Earth-1 went up in smokes. They soon discovered that Martin Stein died from his injuries. In the final battle with the Nazi's, Alex and Sara teamed up against the Nazi's and won after the deaths of Dark Arrow and Overgirl. Alex attended the funeral of Martin Stein along with everyone else. Alex and Sara had one last conversation in which Alex agreed with Sara that she should follow her instincts, they hugged before parting ways. Alex and Kara said goodbye to Barry, Iris, Oliver and Felicity and returned to Earth-38.
The rise of Reign
After returning home, Alex along with Kara, Winn and J'onn listened to Mon-El and Imra's interpretation of their future, Imra revealed to them that they are part of a group called The Legion and that Mon-El helped create them through what he learned from Supergirl. Alex went to Kara's Christmas party, where she bonded with Ruby Arias through tales of her adventures with Supergirl, who Ruby idolizes. Later when an unknown Kryptonian arrives in National City leaving marks all over the city, Alex finds out along with everyone else that the Kryptonian is said to be the Krypton equivalent of the devil, Reign. When Reign finally makes her presence known and is called out by Kara, Alex tells Kara that she needs to embrace her Kryptonian side. Kara did, but was brutally beaten to unconsciousness. Alex arrived at the scene and took Kara back to the D.E.O. where she attempted to keep Kara alive after her brutal fight with Reign.
Mon-El awakened Querl Dox from his hibernation in order to help Kara and Alex watched with the others. Mo-El and Imra told Alex and the others about their mission and that they know Reign eventually left but with Supergirl out of commission, Reign is creating terror. In order to capture her, Alex, J'onn and the DEO staged a robbery in which Reign arrived to kill them, but when they revealed themselves she hesitated, this allowed the DEO to use their advanced weapons to capture Reign, in which Alex placed a chain with kryptonite on hjer, but she resisted it and broke out and used a whip that was used on her to snap Alex's leg. Alex was taken care of by Querl, in which Alex decided to watch over Kara, she would use words of encouragement that Querl would use to help Kara awaken. Alex witnessed Kara awaken and told her of the plan that the Legion were doing, in order to subdue Reign. Kara left and was successful in subduing Reign, though she escaped.
Bonding with Ruby
With her leg broken, Alex was side-lined from active duty, when Sam couldn't get her usual sitter for Ruby, Alex offered to look after Ruby. Alex and Ruby bonded throughout the day, in which Alex got a text from Maggie, asking about her passport that she left at her place, Alex pointed out to Ruby where she believed it to be and she was right. Ruby then admits to Alex that she is being cyber-bullied, refusing to allow this, Alex had Ruby take her to the girl and pretended to be an FBI agent, and scolded the girl for cyber bulling. Alex and Ruby spent the rest of the day bonding, when Sam arrived to pick her up. Alex pretended that Ruby was a nightmare that Sam laughed about. When Alex asked about Sam's business trip, Sam had no knowledge of it, Sam then asked for Alex's help.
Fully healed from her leg injury, Alex ran some tests on Sam to find out what was wrong but had no luck in finding out. While at the DEO, Kara arrived with a dying Lena, who had ingested some poison, after asking Kara several questions, Alex deduced the poison and had Kara use her freeze breath to counteract the poison. Alex and Sam then went to Kara and Lena in which Sam revealed to them about her blackouts, after hearing from a friend, Alex informed Sam, Lena and Kara that there was nothing wrong with her blood.
Becoming the new director of the D.E.O.
Losing her memories
After Supergirl attempted to save a freighter from invisible aliens, Alex arrived with Colonel Haley to investigate and clean up the matter. However, Haley was more concerned about finding out Supergirl's identity, which forced Alex to do whatever she can to keep her sister's identity safe. She briefed all those within the D.E.O., who knew Supergirl's identity about Haley's intentions, and they all swore to protect it.
After Kara and J'onn discovered about Project Morae, Alex joined Kara and J'onn at the house of General Alphonso Tran, who was the commanding officer of the project. He explained, that they found three Morae children, and after learning of their camouflage ability, they were trained to become invisible assassins. But the methods used were brutal, and now the Morae wanted to find and kill all those involved in their lifelong torture. The Morais arrived, and despite the protection from Alex, Kara and J'onn, they managed to kill Tran.
Alex returned to D.E.O. to question Haley about Project Morae, as she was involved in it. Haley admitted it, but claimed she wasn't involved in the Morais torture. Alex grows even more frustrated as Haley was turning the D.E.O. into a force for an alien war, and that she was more focused on discovering Supergirl's identity than protecting Earth. Alex called Kara and claimed that as long as Haley is in the D.E.O., she can't work there anymore. Kara said that she just has to bear it, and fight for her ideals. Just after that, Alex discovered that agent Reiff had broken during Haley's interrogation, and revealed Supergirl's identity. Haley reprimanded Alex for protecting her own sister. At that moment, the Morais attacked the D.E.O.
Haley had ordered the use of lethal weaponry against the Morais. Eventually, they managed to corner Haley to the cell block, where Alex managed to save Haley with Supergirl's help. However, despite that she was just saved by Supergirl, Haley attempted to blackmail her into rejoining the D.E.O., so that she could keep her in line, otherwise she will reveal her identity to the world. Alex snapped, and knocked Haley unconscious. The sisters put her inside a cell and called J'onn to erase her mind of the knowledge. J'onn reluctantly did.
The next day however, Alex saw Haley bringing with her a Vertullarian. Brainy revealed to Alex that they are known as "Truth Seekers", capable of detecting lies. Although Haley's memory was erased, her desire to reveal Supergirl's identity wasn't. Alex went to J'onn's office, where he claimed that there's no avoiding a Truth Seeker; anyone who knows Supergirl's identity, will be forced to reveal it. All the agents, who knew about it, agreed to have their memory erased by J'onn to protect Supergirl. But when Alex said that she too has to have her memories erased as well, Kara denied her, to no avail. Kara left the office in tears, unable to look as J'onn erased Alex' memories of Kara being Supergirl.
Regaining her memories
Despite the martial law, Alex is exercising with Kelly, and they talk about Kara and James. Alex' phone rings. It's the adoption agency saying that they have found a suitable baby for her. She is immediately nervous, and with Kara in Kaznia, she isn't of support. However, Kelly goes with her to Portsmouth.
In a hotel at Portsmouth, Alex gets even more nervous, since she worries, will she be a good mother. Kelly calms her down, and by asking, what Kara would do, Alex gets the courage. But then, the phone rings, and it turns out the birth mother decided against all odds to keep the baby.
The two return to National City, where Kelly tells her she too was once engaged, but nobody knew. Her fiancé was killed during a military operation. Alex sees she and Kelly are in many ways alike.
Alex has a dream from her youth from 2007, when she was with Kara in the cliffs in Midvale, and taught her to be in the rhythm with music. As Kara clapped her hands in sync, she accidentally caused a thunderclap, that knocked them both down the cliff. The dream ends there, and Alex begins to wonder, what does the dream mean. Alex gets a call from Brainy, and she goes to the D.E.O., where she sees that Ben Lockwood took all the experimental Harun-El serum. Lena arrives, and reveals, what she and Kara learned in Kaznia, and that Lex has engineered Kaznia to invade the United States. She also reveals that Lex has a clone of Supergirl, who was the real culprit behind the attack on the White House. Alex decides to find the clone herself.
Kara sneaks into the D.E.O. to talk with Alex, to warn her about the Red Daughter. Colonel Haley catches them, but they convince her, and together all three try to find out, where Red Daughter is. Haley also has been looking into the Claymore, since she didn't know about it. They triangulate an address in National City, and Kara goes there. Alex wants to come along, but Kara denies it.
However, Alex doesn't remain behind. She comes to Red Daughter's apartment, and is shocked, that it's like an exact copy of Kara's apartment, and that Kara's apartment can be seen there. Alex wonders, why Red Daughter would be interested in her sister, and starts to have more suspicions. Her phone rings. It's Eliza saying, that Kara just came by. Both Alex and Kara realize it's actually Red Daughter. Kara speeds away to Midvale, while Alex follows in a motorcycle.
The night falls by the time Alex reaches Midvale. When she hears Supergirl's and Red Daughter's fight, she witnesses Red Daughter defeating Supergirl. With every hit Red Daughter inflicts on Kara, Alex has flashes about her memories with Kara, from their youth and Kara's early times as Supergirl, when they fought together. Alex's memories return, and she once again remembers, that Kara and Supergirl are one and the same, her beloved adoptive sister. As Red Daughter hovers, seemingly victorious, Alex goes to her sister, whose heart beat fades. Eliza arrives, saddened, but Alex claims she only needs sunlight to recover and Alex tries to put grass on Kara's hand, since plants too have sunlight within them. At first, nothing happens, and Alex cries in despair but then sunlight starts seeping from plants towards Kara, and she is revived. Alex and Kara are immensely happy to see each other again.
Alex, Kara and Eliza return to the Danvers' house in Midvale, and Alex talks with Colonel Haley, who reveals, that the Claymore Kara destroyed was actually a prototype. Since then, Lex developed it into a size, that it can be used with Lexosuit. Haley tells Alex to turn on the TV. President Baker holds a speech, where he commends Lex as the one, who saved America from the Kaznian invasion, and further frames Supergirl, as Alex and Kara witness Lex defeating and carrying an unconscious Red Daughter in his arms.
Battle at Shelley Island
Alex arrived with Kara to Lena's office and met with Brainy, who had reacquired all of Kara's evidence about Lex's scheme. As Lena left for the White House, Alex supported Kara, as she wrote her article in order to expose Lex. When Kara was finished, Alex commented, that the article is a real masterpiece, maybe even worth a Pulitzer. Brainy, acting without emotions, expected Nia Nal to appear in the office through astral projecting. When she did, Alex and Kara couldn't see her, but Brainy breathed water vapor on window, and Nia wrote "Shelley Island" on it, as it was Lex's base for captured aliens. Kara and Alex went to get James and then head to the island with Brainy.
When the four arrived on the island, they were met by Ben Lockwood and the Children of Liberty. They wanted revenge against Lex for using them as pawns and also kill every alien they could find on the island. A battle erupted between them and Superfriends, but the Children were no match against them. Suddenly, Lex arrived. Kara took him on, while Alex remained with James to take care of the Children. During the fight, James and Ben used the Harun-El extractors on each other, and took out their superpowers. After this, Alex beat Ben to the ground, and claimed she had wanted to do that to him for some time. The battle on the island ended in Superfriends victory: Lex was defeated by Kara thanks to Red Daughter's sacrifice, and J'onn and Nia managed to stop Lex's Claymore from destroying Argo City.
After the battle, Alex was walking to J'onn's office with Kelly. Kelly admitted, that her time with Alex had made her feel whole again, and they both kissed. This was the proof of the encouragement Alex received from Sara Lance, that there is someone out there for her. They were passed by Nia and Brainy. Inside the office, all of the Superfriends had gathered for a game night, finally able to relax. Lena arrived later as well. When Kara went to get more drink, she told Alex that she can no longer keep lying to Lena about her identity as Supergirl, and intended to tell her. Alex, however, suggested, that since Lena has gone through a lot because of Lex, to let Lena enjoy this night without further distractions. However, both Alex and Kara were unaware that Lena had already learned the truth about Kara's identity from Lex.
Conflict with Leviathan
After the Children of Liberty were defeated, a new criminal organization arrived in National City; the Leviathan.
Alex learned that worlds were being destroyed by an antimatter wave so she went to Lena Luthor for help despite not trusting her. The two combined their knowledge in science and engineering to create Transmatter portals to send the inhabitants of Earth-38 to Earth-1.
During the Anti-Monitor Crisis, Alex as well as everyone in the multiverse except for the seven Paragons, was killed in an antimatter wave by the Anti-Monitor on December 10, 2019, only to be restored a month later, after the Paragons and the Spectre created a new universe.
In the New Earth, Alex's life appears to remain the same, after the creation of Earth-Prime, with the sole exception that Lex Luthor's is an international hero and creator of the DEO, and now forced to work together.
Later, Alex immediately went to Central City to join the final battle alongside J'onn, Kara, Nia, Clark, Spartan, the Flash, White Canary, Batwoman and Wild Dog to stop the resurfaced Anti-Monitor from destroying everything once more.
After dealing with the brief disaster of multiple Brainy’s, they determine they are all one and the same, just different versions of their Brainy before the new creation of Earth prime. 
Reunited with Winn
Winn makes an unexpected trip from the future, wanting to clear his name from a doppelgänger look-alike. Everyone gathers at J'onn's office who has added a secret entrance for their new headquarters. Toyman - Winn from the alternate timeline appears on their screens, promising a firework display once he reaches 1 million followers. After defeating him for the first time they celebrate with karaoke.  While dealing with evil Winn, Alex, wanting to solve her problem of working with Lex plant spyware on DEO Internet, but Brainy removes it, not wanting her to get caught. No longer able to work under Lex’s thumb, Alex quits.  While doing some light commiserating with her sister, they are interrupted with the revival of Mr. Mxyzptlk, looking to make amends for his last visitation. Kara agrees to his help and sends her and J'onn away for an elaborate game of paintball. 
Alex removes herself after William brings Kara and Nal coffee. She and J'onn track down who might be attacking Andrea Rojas right before the launch of her Obsidian Platinum lenses. Brainy thinks it might be xx’s aliens. And when the question one of the alien bartenders he disagrees, as they are not aggressive. Despite Brainy confirming no one was at an address outside the city, they decide to check it out but are attacked by the mind controlled aliens, and Alex is unable to work her Martian weapon. After calling Supergirl she saves them and tracks down the emotionally distraught wife who lost her husband to suicide. 
Losing her father
Weeks later, Alex gives her sister a quick pep talk before her first date with William, Alex begins her investigation into a missing alien refugee, Trevor Crane, who disappeared after volunteering as a trial patient for Obsidian lenses. With Kelly's help she uses the new lenses, and enters the alternate reality version of Las Vegas. Once inside she discovers a random add-on of a haunted house, and frees a couple of people trapped inside. She has much more control over her Martian weapon, creating the key, but once she goes through the door she loses communication with Kelly.
At the end of the hallway she finds Trevor, who randomly explodes every couple of minutes. She talks him through overcoming his mental barriers, and eventually helps him out of the game, but only after physically fighting Richard Bates, the man who trapped everyone inside.
Afterwards, in reality, Alex and Kelly go to Al's Dive Bar and discuss virtual morality, and how people are having affairs in VR while evading guilt because they believe it is not real. Trevor Crane soon approached their table and finally met and hugged the real Alex.
Later, Alex and Kara receive a devastating phone call from their mother, that Jeremiah Danvers is dead.  His funeral is the following day and both Alex and Kara have an explosive argument when Alex refuses to grieve for her father one more time, insisting he was always so focused on protecting Kara, he stopped being a good father, long before he disappeared. Kelly tries to calm her down and suggests that she stops drinking, much to her annoyance.
Wanting to be alone, Alex eventually decides to put on the new Obsidian lenses. Once inside her alternate reality, she decides to be Supergirl. She meets a couple of people looking to escape inside the game as well, and while dealing with her anger and grief is also slowly sucked into a fake reality believing it too is real. After again saving the day and stopping a bank robber, she discovers her teenager self is one of the criminals. Unbeknownst to her, Kelly is trying to contact her and wake her up from the outside.
After an intense standoff with her video-player friends, Kelly is able to forcefully awaken her. She confides in her and how she just wanted to escape and eventually decides to go to her father's funeral. 
Life without the D.E.O.
Alex continued to practice with the Hand of the soldier but she missed the resources that she once commanded as director of the D.E.O. as the other members of the Superfriends used their powers to search for Leviathan. Places that were once theirs have changed on Earth-Prime. Alex suggested that she and Kara should meet with Pete Andrews, an old friend of Kelly's who worked in Washington, D.C. and has knowledge of obscure information.
While there, Kara gets called back to National City by William Dey who is researching Margot Morrison, leaving Alex and Pete to continue their research. They have a difficult time when the library refuses to willingly give them the proper papers and books. Suddenly, an assassin begins firing at them, causing them to run for their lives. Ultimately, Alex leaves the city discouraged.
When she returned home, she told her ordeal to Kelly, who suggested that if she was going to act as a super hero, Alex might as well dress as one. Taking the advice, Alex asks J'onn J'onzz to prepare for her a protective suit.
The Superfriends get a call that Lena Luthor was in Kara Danvers' apartment and Kara needed help; they hurry to Kara's location and burst through the door, with Alex armed and ready to fight. Kara calmed her teammates and explained that Lena was there telling all she knew about Leviathan and Lex and Kara wanted their help in stopping their plans. The team discussed recent events and it was decided that the Martians would distract Rama Khan away from Kara as she got a new suit from Lena. Alex took Kara to the side and caused her sister to scream in delight as she saw the new suit that J'onn had prepared for Alex.
Alex teamed up with M'gann M'orzz, who shape-shifted to look like Supergirl, to be a distraction. When they received word that Rama Khan was fighting Dreamer and Martian Manhunter elsewhere, they relaxed for a moment until M'gann felt the presence of Sela. Alex used her Martian weapon to create a bazooka to blast the foe, but Sela was not deterred and attacked the two with her electrical powers, ultimately causing Alex and M'gann to flee.
Soon after, Alex received a call from Kelly that William was missing and Kelly wanted help to break into Obsidian North to find information on where he might be. They quickly learn that William is a hostage of Eve Teschmacher and convey the information to Kara.
Later, Alex is with the others as they made a stance against Leviathan to distract them as Supergirl entered Obsidian Platinum to save its users from being killed while in virtual reality. The Jarhanpurians suddenly disappeared, thanks to Querl Dox.
Alex is a courageous and independent person, who faces danger head on. She is caring, confident, and headstrong, with the same passion for bio-engineering like her parents. Alex had dedicated her life to protecting her sister, Kara, and rarely found time for herself since teenhood. Despite her good traits, sometimes Alex can be impulsive and prone to make difficult decisions crossing the line between right and wrong (some might even classify her as morally grey); such as when she stabbed Astra in the back, or when she assaulted a Cadmus facility on her own by placing mines in the structure to blackmail Lillian Luthor, even if on those occasions it was to save first J'onn J'onzz's and then her father's life. However, she has a great sense of justice, since when J'onn took the blame for Astra's death, as he did want not Alex to lose her relationship with her adopted sister, knowing it was wrong, she eventually confessed to Kara her role in Astra's death despite her fear to lose her. After much soul searching and exploration, Alex finds the courage to come out as a lesbian to herself, then to her ex-girlfriend Maggie Sawyer, then Kara, her mother Eliza, her friends and her father Jeremiah. Alex's interactions with Maggie show a more flustered, awkward and almost goofy side of her personality, similar to that of Kara. Above all, Alex is a strong woman, she fights for what she believes in and has a difficult time giving up. When she was kidnapped by her childhood friend, Rick Malverne, she never stopped trying to escape and was able to use her D.E.O. training to help her survive. She has been referenced as being a "bad-ass" by many people. After losing Maggie, Alex became devastated unable to cope with it and started drinking heavily. She is also fond of leather jackets. Alex loves her sister and asks J'onn to erase her memories of Kara's identity as Supergirl. Alex later retrieves her memories when Supergirl saves her and fights Red Daughter.
After her memories of Kara's identity as Supergirl were erased by J'onn J'onzz, Alex's view on aliens completely changed; for example, she was about to kill an innocent alien who was attacking Bobbi Miller (as he believed her to be a member of the Children of Liberty) as he was only defending his home, which forces Kara to use her heat vision to disarm Alex of her weapon. However, even without her memories, Alex still teamed up with Supergirl when a false Supergirl attacks the White House.
- Peak of human physical condition: As a top agent of the D.E.O., Alex is in top physical condition, with heightened reflexes, strength, and durability. She regularly engages in intense exercises to maintain her conditioning. Alex is strong enough to break Rick Malverne's nose with a single punch. Alex was even capable of swiftly subduing Brainy and knocking him out with a single punch.
- Acrobatics/Free-running: Alex is very agile and nimble, able to fall from multiple feet without injuring herself.
- Master hand-to-hand combatant/Martial artist: As an agent of the D.E.O., Alex is a highly skilled hand-to-hand combatant and martial artist. As required by the organization, she went through an entire year in training before being let out into the field, which included spending 12 hours a day for five months in the D.E.O.'s training room. Alex has proved to be capable of defeating multiple alien enemies at once with ease. She was able to fight on par against notorious assassin John Corben and was skilled enough to battle him to a stalemate. Alex was also able to easily defeat multiple Earth-X Nazis and together with Sara Lance, overpower Earth-X Tommy Merlyn. Alex could stand up to Mercy Graves for a while before being pushed back. She was later able to hold her own against and eventually overpower Manchester Black, and managed to fight Ben Lockwood on equal grounds even after the latter was mutated by the Harun-El.
- Skilled knife wielder: Alex practices fighting with knives as part of her D.E.O. training. When battling Nazis during the Earth-X invasion, she proved capable of fending the assailants off with a blade.
- Expert markswoman: Due to her D.E.O. training, Alex is highly trained in using multiple kinds of firearms.
- Expert swordswoman: Alex was able to fend off various rogue Kryptonians with a sword made of Green Kryptonite. During her fight with Earth-X Tommy, she managed to disarm the latter of one of his katanas and use it against him.
- Expert stick-fighter: Alex is an accomplished stick-fighter, able to take down multiple Cadmus agents with a pool hue.
- "They recruited me because my background in bioengineering makes me an expert on alien physiology."
- —Alex Danvers to Kara Danvers[src]
- Genius-level intellect/Expert tactician/Leader: Alex has a very sharp intellect. She pursued an M.D./PhD at an accelerated speed and finished the PhD portion by 2012 at the age of 23. Additionally, Alex is a highly trained tactician and an extraordinary leader, capable of managing and organizing a handful of D.E.O. agents by herself. She is also the second-in-command of the D.E.O. and was the acting director of the organization when J'onn J'onzz was captured by Non and Astra and when J'onn was incapacitated during the Daxamite invasion. J'onn even entrusted Alex with leading the D.E.O. once he retired for good.
- Master scientist: Alex displayed an aptitude towards science since early childhood, as demonstrated by her interest in science fairs as a child. Having a PhD in bioengineering, Alex is also an expert in alien physiology and has used this knowledge in multiple D.E.O. operations, such in the mission to capture the Hellgrammite; she figured out that the Hellgrammite embodied chlorine-based DNA and thus was raiding multiple chemical plants to gather their stockpiles of DDT for use as food. Alex was able to successfully create Blue Kryptonite to incapacitate Bizarro and working with Maxwell Lord, synthesized a cure for Red Kryptonite. She is also an accomplished neuroscientist and xenobiologist. Alex herself stated she could've had a promising medical career as a researcher had she not decided to work at the D.E.O. instead.
- Medical knowledge: Alex has performed medical procedures on both humans and aliens; she patched James Olsen up after he was knocked out by a super soldier with Livewire's abilities and examined a comatose M'gann M'orzz, who suffered a psychic attack, figuring out that a Martian mind meld with J'onn would be the only way to save her. Alex also performed an MRI on Samantha Arias when studying her blackouts and helped save Lena Luthor when the latter was poisoned. She and Lena later worked to treat Sam's failing health following her separation from Reign.
- Expert interrogator/Torturer: Due to her time with the D.E.O., Alex is an effective interrogator and torturer. She once claimed to know six ways to torture someone with just an index finger. Her knowledge of interrogation techniques is so advanced that when she was interrogated with a polygraph, Alex managed to fake the results.
- Explosives expert: Alex demonstrated expertise with bombs, as seen when she rigged an entire Cadmus facility with Haldorr particle mines, linking some of them to a dead man's switch.
- Expert driver/Pilot: Alex is a very capable pilot, being able to drive both common vehicles and spaceships.
- Indomitable will/High tolerance for pain: Alex has shown she is capable of tolerating a high amount of pain; while captured by Malverne, she snapped her credit card in half and used its broken edge to cut deeply into her skin on her shoulder to remove her subdermal tracking chip with barely any reaction. With help from her mother, Eliza Danvers, Alex was able to overcome Indigo's brainwashing. She even battled an army of Earth-X Nazis in spite of being slightly hungover.
- Intimidation: Alex was able to intimidate Winn Schott to the point that he revealed that James Olsen is Guardian. However, when she attempted to intimidate Julia Freeman (who's alter-ego, Purity was in control at the time) by threatening her with months of incarceration, in order to get her to reveal who the other world-killers are; unfortunately, this completely backfired, as Julia was completely unfazed by these threats of hers. However, after Alex's memories of Kara's identity as Supergirl was erased by J'onn J'onzz, she no longer has the ability to intimidate any individual; even someone like Spencer, who has no form of training to resist interrogation. It is likely that she regained this ability after getting her memories back.
- Protective suit: Winn made Alex a protective suit for the battle against the Worldkillers. The suit is fitted with magnets so that Alex is able to force her gun back to her. Since leaving the D.E.O. Alex has lost the use of this equipment being D.E.O. property.
- Kryptonite-powered exosuit: Alex used a special cybernetic exosuit powered via Kryptonite, which she got from Non while under Myriad's mind control, to allow her to fight superhumanly stronger opponents such as Kara Danvers or Metallo by physically enhancing her. Also, the suit's forearm was fitted with a Kryptonite-powered energy gun and it could generate green, concussive shockwaves to physically repel and incapacitate opponents, especially Kryptonians. Since leaving the D.E.O. Alex has lost the use of this equipment being D.E.O. property.
- Taser batons: Alex uses a pair of batons with an electric charge powerful enough to incapacitate super-powered humans. Since leaving the D.E.O. Alex has lost the use of this equipment being D.E.O. property.
- Kryptonite electric field: With her new suit that Winn made her has included some new features such as a kryptonite blaster on her glove of her suit that generates a Kryptonite energy field.
- Magnets: Also built into the suit are magnetics which can be used for offensive and defensive ta such as pulling her gun towards her if disarmed. She has also used the magnets in the suit to make a magnetic shield to defend herself or to contain explosives.
- Maaldorian laser pistol: During a rescue mission on Maaldoria, Alex acquired an alien pistol from a fallen alien. The pistol itself is shown to be very powerful as it sends any target it hits over a distance and it has even proven strong enough to take down a White Martian, albeit weakened from J'onn and M'gann. Following the constant attacks by the Worldkillers, Winn has upgraded the gun to use not only laser bullets, but also Kryptonite bullets when fighting the Kryptonian witches.
- Kryptonite bullets: While fighting the Worldkillers, Alex alien pistol was modified to shoot Kryptonite bullets when loaded.
- Electric bullets: While fighting against some mind-controlled aliens, Alex used electric bullets to restart Supergirl's protective suit.
- Electric net ammunition: Generates an electrical net capable of briefly restraining three Kryptonians, It works until the net is blasted by heat vision.
- Hand of the soldier: Alex received a Martian watch from J'onn which is capable of transforming into any weapon she wants to use eg. Guns, brass knuckles, knifes.
- Protective suit: Winn made Alex a protective suit for the battle against the Worldkillers. The suit is fitted with magnets so that Alex is able to force her gun back to her. Since leaving the D.E.O. Alex has lost the use of this equipment being D.E.O. property and has started wearing a black and blue suit that was manifested by the Hand of the soldier for her time as a vigilante.
DC's Legends of Tomorrow
Adventures of Supergirl
TV Guide Comic-Con edition
Crisis on Infinite Earths
- Since quitting the DEO, Alex is unemployed. Possibly she is currently living on her savings or works with J'onn as a detective.
- Alex has appeared in every episode of except "" and "".
- Alex is one of the only two characters who appeared on all four main series of the Arrowverse (, , and ), the other being Kara Danvers.
- Alex is the fifth character in the Arrowverse to have an episode named after her in a civilian sense, after Sara Lance, Felicity Smoak, Harrison Wells, and Oliver Queen.
- Alex is listed on Maxwell Lord's phone as Mata Hari.
- She has an M.D. and a PhD in bioengineering.
- Three of her favorite shows are Homeland, Game of Thrones, and The Wire.
- According to Kara, Alex never eats sugar in the middle of the day.
- She enjoys scary movies.
- As a teenager, Alex liked punk rock music.
- She is a fan of the Barenaked Ladies.
- Alex enjoys pizza and eats it more than most foods. Her favorite meal is her mother's homemade lasagna.
- She had the chicken pox in junior high.
- She likes her coffee with honey.
- Alex's favorite ice cream is rocky road.
- Her favorite color is blue.
- Her favorite animals are dogs.
- Alex's favorite movie is Terminator 2: Judgement Day, which she considers to be "the greatest movie of all time".
- She wants to be a mother and have children one day.
- Alex has double piercings in her right ear and triple piercings in her left ear.
- Alex, Maxwell, Lillian Luthor, Lena Luthor, and Eve are so far the only humans known to be able to create Kryptonite.
Behind the scenes
- Alex Danvers is the first main character of who doesn't originate from the DC comics, being created exclusively for the TV series.
- In the DC comics, the Danvers family did have a biological child, but instead of a girl named Alex, it was a boy named Jan.
- Alex references a time she was a doctor in Seattle in the episode "". Her actress, Chyler Leigh, previously portrayed a doctor named Lexie Grey in Grey's Anatomy, which took place in Seattle.
|Other versions of Alex Danvers|
|To see other versions of this character, click the Earth name below for that Earth's counterpart of Alex Danvers.|
|Earth: Prime • Obsidian Platinum|
|Earth: 1 • 38 • TUD15|