Mon-El

"I want to help you keep the world spinning. To prove that I was spared for a reason."

- Mon-El to Kara

Mon-El is a Daxamite who crash-landed on Earth after escaping the ravaging of his home planet Daxam. While adjusting to living on the new planet, he briefly used the fake identity of "Mike Matthews".

Daxam's demise
Mon-El worked as a palace guard for the royal family of Daxam. The day Krypton was destroyed, its debris showered on to the sister planet, causing multiple casualties. Mon-El tried bringing the prince to safety, when they spotted a functional Kryptonian pod used by a visiting delegation, he instantly decided to send the prince away, but the prince chose to embrace the fate of his people, so he locked Mon-El in the pod instead and sent him away.

Landing on Earth
The pod travelled passing the Well of Stars (a region in space where time is ceased) and got stuck there for decades, before eventually finding its way to Earth where it crash-landed. Supergirl quickly discovered the pod, and she and J'onn J'onzz took the man to the D.E.O. to run some tests. However, they discovered that he had skin that could not be penetrated by a needle and so the man remained comatose.

Escape from the D.E.O.
He eventually came to and escaped into the city, and found his way to a station in hopes of sending a signal to his planet. The signal was detected by Winn and Supergirl, upon finding out he was from Daxam and fearing that he was behind the attack on President Marsdin. Supergirl apprehended Mon-El at the Mount Pride Observatory and temporarily incapacitated him. The next day, she apologized for her prejudice after realizing Mon-El wasn't behind the assault. She told him that Daxam had become a wasteland, as a result of the planet's moon being struck by Krypton's debris that disrupted Daxam's gravitational force. He then realized his only option was to remain on Earth.

Adjustment to living on Earth
Soon after, Kara decided to help Mon-El get a false identity as "Mike", and a job at CatCo. While Kara tried to coach him in human customs and work ethics, he resisted the boring lifestyle of a desk job, refusing to do any work and engaging in office sex with Eve Teschmacher. Eventually he was fired from CatCo.

Mon-El found new work as a loan enforcer, to which Kara is oblivious. Eventually however she caught him attacking an alien for his employers. In the heated conversation that followed, she told him she was disappointed and that he was no hero, and in turn he told her she was not really altruistic, but rather an attention seeker. The exchange left both disheartened.

Path to Heroism
Soon after, Kara was seriously injured after a battle with Parasite. After seeing her unconscious and still thinking about what was said during their conversation, he became overcome by guilt and left. Mon-El was found by Alex drinking alone at the underground alien bar. Alex appeared to belittle Mon-El and saying that she believed he was a coward, but reminded him that Kara, who constantly put herself in danger and was hurt by Parasite, sincerely believed otherwise. Moved by this, Mon-El took off alone to battle Parasite, however he was no match for the rampaging monster. In the midst of the destruction however, Mon-El performed his first heroic deed by saving a by-standing child. With the help of Guardian and a recovered Supergirl, they managed to defeat the threat. Seeing Mon-El redeem himself, Kara thanked him, while also noting Guardian's contribution. That night, Mon-El wandered the streets looking for people to help. Approaching what appears to be a sick homeless man, he was instead subdued by the Cadmus agent in disguise. He was transported to a Cadmus facility, where Supergirl was baited to rescue him. After threatening to kill him with lead, Lillian Luthor succeeded in forcing Supergirl to overload her powers, despite his pleas for Kara not to do it. Cadmus then proceeded to obtain Supergirl's blood for the purpose of obtaining information on "Medusa". Left in the cell, Mon-El and Kara bonded and discussed their fears, and what happens if they do not live through this ordeal. Fortunately they were rescued by Jeremiah Danvers, who had access to Cadmus IDs, and chose to remain behind for unknown reasons.

Kara, Mon-El and friends celebrated their return in Kara's apartment. She told Mon-El he was brave throughout the ordeal. He replied any courage he had, he learnt from her. During this time Mon-El began developing a romantic interest on Kara, asking Winn and James if she was "mated to anyone". James replies that Kara hasn't mated with someone yet.

A few days later, Mon-El is invited have the Thanksgiving dinner with Kara's family and friends. Later, that night, after a rough fight with Hank Henshaw outside the alien bar, Mon-El contracted the Medusa Virus, which was deadly to all alien species except for humans and Kryptonians. Mon-El was then quarantined at the D.E.O., where he soon collapsed and nearly succumbed to the virus before Eliza Danvers was able to extract a sample of the virus to create a cure.

In the aftermath of the incident involving the virus, Mon-El became a bartender at the alien bar due to many aliens having been killed. When Kara came to bar to speak to Maggie about investigating the disappearance of Izzy Williams, Mon-El decided to help her.

The two pretended to be a couple of millennials and visited a clinic linked to the disappearances that was offering money rewards for blood tests. Soon they discovered the personnel there are in fact aliens and Kara pursued them through the portal that connects Earth to their planet; despite being told to go get help, Mon-El did likewise and follow her. After realizing the new planet they landed on had a red sun, depriving them of their powers, the two were ambushed by a harmless hermit alien and Mon-El realized they were on Maaldoria, the "Slaver's Moon", a hub of sentient trafficking. Kara and Mon-El were able to infiltrate the slavers' fortress by feigning surrender, and afterwards they encountered Roulette, who was partially behind the operation. They also discovered the missing humans, and with them were soon sold to a Dominator. After Mon-El had a talk with Kara about heroism, the slavers ordered the group to start moving. Kara, despite having no powers, attempted to block them from taking the others, only to be hit with electric shocks. As the slavers repeatedly tortured her with their weapons, Mon-El and others, seeing her in agony, were moved by her sacrifice; the group seized the opportunity to disarm the slavers and moved together to escape. Mon-El helped to hold their pursuers off but saw that one of them was aiming a blaster at Kara and moved to shield her. However, a Dominator stopped the guard before he could fire and insisted that Mon-El must not be harmed before bowing to him in respect. Mon-El slightly nods at this before escaping with Kara. They were then helped out of the fortress and taken to the portal by Alex and the strike team that she had assembled.

Later that night, Mon-El went to Kara's apartment and tells her he has decided that he wanted to join Kara in her work to protect people. He told her that he wanted to be a superhero on Earth just like her.

Personality
Mon-El is light-hearted, cheerful, carefree, laid-back and fun-loving. He hates being locked indoors and loves to party. Presumably like all Daxamites, Mon-El dislikes Kryptonians; due to their arrogant and self-righteous traits, although he later warms up to Kara. Mon-El also possesses good morals, as he shows guilt and remorse for his actions.

Some people see Mon-El as a coward who runs away at the first sign of danger. However, in truth, he only avoids fights because he doesn't want to get involved unnecessarily, as well as the fact that he has no desire to become a hero. After some word with Alex, however, Mon-El begins to warm up to the idea and also develops a romantic attraction to Kara.

Since Mon-El is new to Earth, he is naïve to how things work on the planet, as well as expressions, holidays, jobs and dangers; when he attempted to have sex with Eve Teschmacher (before this was prevented by Kara) she asked him if he took protection, Mon-El took this as an expression for a weapon like a sword, unaware that it actually means a condom.

Powers

 * Daxamite physiology: Normally, like all Daxamites, Mon-El's capabilities are no greater than a normal human of his physical conditioning. However, once charged by the energy of a blue or yellow sun and metabolized into his body, he becomes able to perform various inhuman feats. While generic for his race (as well as for Kryptonians), upon arriving to earth for a short amount of time it is unknown whether he will develop other powers.
 * Solar energy absorption: While Mon-El's powers are dependent on the energy spectrum from a blue or yellow sun, his body is able to constantly and passively absorb such energy while exposed to it, essentially keeping his reserves fully charged near-constantly. Direct exposure to sunlight will also accelerate his recovery from any injuries he does manage to sustain.
 * Accelerated healing factor: Mon-El is able to heal much faster and efficiently than a normal human; due to him absorbing energy.
 * Invulnerability: Mon-El's body is impervious to disease and damage than a normal human's, as needles couldn't penetrate his skin; the full extent of his durability is currently unknown.
 * Super speed: Mon-El is able to move, react and think at amazing speeds far exceeding that of a normal human.
 * Super strength: Mon-El possesses an incredible amount of strength, as he was able to temporarily hold his own against Kara and easily choke her. Although Winn states, that his strength is not equally as high as Kara's.
 * Super leaping: Mon-El's incredibly strong legs have the ability to do incredibly high jumps in a single bound.
 * Photosynthesis: Mon-El's cells harness and absorbed the electrical energy surrounding him, manipulating it to regenerate himself at a cellular level and even his own energy source when he was comatose.

Abilities

 * Expert hand-to-hand combatant: As a former palace guard of Daxam, Mon-El is an expert in unarmed combat.
 * Expert marksman/Firearms: Mon-El has proved to possess a certain level of knowledge on the use of firearms.

Weaknesses

 * Lead: Lillian Luthor discovered that Mon-El has a weakness to lead. If a lead bullet stayed in his system for too long, he would die from poisoning.
 * Red Sun energy: Like Kryptonians, exposure to the Red Sun will make Mon-El the equivalent of a human being on Earth.

Supergirl
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Season 2
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Behind the scenes

 * In DC comics, Mon-El (alternatively spelled as M'Onel), born Lar Gand, is a Daxamite superhero known as Valor, inspired by a young Superman.