Laurel Lance (Earth-X)

"I will fight until every last one of you finds the same fate as my brothers and sisters."

- Laurel Lance to Leo Snart

Laurel Lance is a meta-human assassin from the New Reich, and the last remaining member of the New Reichsmen, known as Siren-X.

Serving the Reichsmen
Laurel Lance was born within the New Reich. Having great meta-human powers, she grew up to become an assassin and a valuable member of the New Reichsmen, an elite branch of Schutzstaffel. Laurel was in love with Oliver, the Führer, though he apparently did not feel the same way.

In November 2017, visitors from Earth-1 and Earth-38 allied with the rebels and killed the leadership of the New Reich, leaving the ruling government of Earth-X to topple. Having not participated in the invasion of Earth-1 for unknown reasons, Laurel survived and decided to avenge the fallen New Reich.

Revenge
When Leo Snart was trying to find her on Earth-X, he mentioned how the Reich had fallen, and that she might as well give up. However, Laurel managed to ambush Leo and hit him with a scream, refusing to give up. As Laurel was about to kill him, he was rescued by the Flash and Vibe. She tracked them through echolocation and used her sonic scream powers on them, but the heroes managed to escape through a breach to Earth-1. Her scream kept the portal open, allowing Laurel to travel through the breach to Earth-1.

While using echolocation to look for Leo, Laurel heard him and Team Flash plan to take Neil Borman/Fallout to Keystone City away from Clifford DeVoe, and tracked them down. Laurel attacked DeVoe and Team Flash. DeVoe escaped to his pocket dimension while Laurel was able to secure Leo's cold gun as she captured Joe West, Caitlin Snow and Fallout.

Laurel brought the trio to the Central City Police Department and forced Fallout to remove his helmet, exposing his powers to the outside world and starting a nuclear reaction within his body. Joe pointed out that this wouldn't bring back the New Reich, but Laurel didn't care and stated that destroying the CCPD would at least make them even. Laurel eventually started to scream at Fallout to speed up the nuclear reaction. Joe tried to stop her but she knocked him aside. The Flash and Leo then tried to sneak up on her, but Laurel's echolocation allowed her to hear them coming and she fended them off. Laurel then used her scream to push back Caitlin and Leo as they tried to suppress the nuclear radiation. As she continued to scream at Fallout, the Flash, with Leo's encouragement, got up and used his speed to knock Laurel against the railing, rendering her unconscious.

Laurel was then presumably taken back to Earth-X and imprisoned by the Freedom Fighters for her crimes.

Powers

 * Meta-human physiology: Through unknown means, Laurel's body was enhanced, enabling her to access her newfound powers.
 * Superhuman sonic scream: Laurel is able to emit a high frequency scream powerful enough to throw an adult human several meters away and even kill them. She was able to use this ability to keep a breach open long enough for her to enter it and speed up the nuclear reaction from Neil Borman/Fallout's body.
 * Echolocation/Super-hearing: Laurel's sonic powers grant her powerful hearing, able to detect movements and noises from great distances while likewise able to determine where they are coming from. Alternatively, she can use her sonic powers to create an echolocation effect, better enabling her to track down targets. This ultimately grants her an early-warning effect, able to better anticipate sneak attacks.
 * Enhanced durability: As a side effect of her meta-human physiology, she demonstrated impressive durability, as she stood unfazed in close proximity to a radiating Neil Borman for an extended period of time while every police officer in the room immediately collapsed due to intense radiation exposure (it wasn't confirmed, if she was given Caitlin's protective non-radioactive iodine solution).

Abilities

 * Master assassin: As noted by Leo Snart, Laurel is an extremely deadly assassin, being one of the New Reich's most valuable soldiers.
 * Skilled markswoman: Laurel is skilled in the use of guns, able to use Leo's Cold Gun with ease.
 * Skilled combatant: While unknown to what degree, Laurel is shown to have some basic combat skills, able to swiftly knock aside Joe West when he tried to attack her.
 * Stealth: As an assassin, Laurel is has skill in stealth and tracking. She was able to ambush Leo and would have likely killed him if not for the intervention of The Flash.

Equipment

 * Siren-X suit: Laurel wears a black leather suit as her alter-ego, Siren-X, which is similar in appearance to the suit worn by her Earth-2 counterpart.
 * Retractable mask: Like all members of the New Reich, Laurel wears an electronic mask to cover her face. It serves as protection and also has a built-in voice modulator to hide her identity.

Former equipment

 * Cold Gun: Laurel stole Leo Snart's Cold Gun while she was trying to kidnap Neil Borman in an attempt to use the latter's powers to destroy Earth-1's Central City. Leo managed to take it back when Laurel was knocked out.

Trivia

 * Like her other known doppelgängers, Laurel was in love with Oliver of of Earth-X, who apparently never reciprocated her feelings.
 * She and Vibe are the only known Earth-X doppelgängers of the main Arrowverse characters who didn't appear in ​.
 * Her absence in the crossover was because Katie Cassidy was mourning the death of her father, David Cassidy, during its filming.
 * Unlike Black Siren, Laurel wasn't brought to Earth-1 with her associated group to participate in a crisis event in Central City, although she found her way months later while she was pursuing Leo Snart.
 * She is also the second criminal version of Laurel to face Team Flash.
 * She's also the most evil of the three, considering she was going to destroy Central City in a Nuclear blast to avenge her fallen regime.
 * Leo noted to Team Flash that Laurel is an elite assassin, making her similar to her late Earth-1 doppelgänger's sister.
 * It is unknown if Laurel is the daughter of the Sturmbannführer and the sister of a deceased unnamed woman, as their Earth-1 and Earth-2 doppelgängers share the above familial relationship.
 * Laurel has triple piercings in her left ear.

Behind the scenes

 * Siren-X shares similarities with Scream Queen, a villainous doppelgänger of the Black Canary from an animated DC Original Movie "Justice League: Crisis on Two Earths", making her the second doppelgänger of Laurel Lance to have them, after Black Siren.