Cecilia Reyes decided to become a doctor when her father was gunned down in front of her as a child, and she was unable to do anything to help him. The X-Men tried recruiting her when it was discovered that she was a mutant, but Reyes had no interest in being a superhero. She preferred to pursue her trauma surgeon career.
Operation Zero Tolerance When Reyes is targeted by
Operation: Zero Tolerance, a government-backed anti-mutant task force, she is forced to join forces with the X-Man
Iceman and other mutants to escape
New York City and track down
Bastion, leader of Operation Zero Tolerance. After meeting with problems with racism and both encouragement from
Daredevil and an encounter with the villain
Pyro, Reyes reluctantly joins the X-Men. Her first adventure involved saving
Cyclops from nanotechnology inside his body, which threatened to kill him and obliterate everything within a three-mile radius. Afterwards, a dazed Cyclops offers her honorary X-Men status. She has several adventures with the team, combating the Ru'tai and the
Shadow King. She usually does not bother with a costume, wearing either the yellow and blue training uniform or, on one occasion as a joke by
Beast, an old costume of
Wasp's. Reyes eventually decides to leave the X-Men and set up her own medical practice. Reyes becomes involved in the X-Men's battle with the
Neo, a villainous group of mutants who claimed to have evolved beyond the level of other mutants. She is trapped in the Neo's fortress below New York City and uses the street drug Rave to enhance her powers, ensuring her survival. The X-Men rescue Reyes and
Professor X helps her overcome her addiction to Rave during a detox period at the X-Mansion.
Neverland Reyes appears as a prisoner at Neverland, a mutant
concentration camp run by the
Weapon X program. There, she attempts to use her medical expertise to help out the other prisoners. She is apparently killed when a brainwashed
Agent Zero destroys the camo. Marvel Comics editor Mike Marts contradicted this in an interview on uncannyxmen.net, stating that if Reyes was dead, then her death would have been shown on panel. As she did not appear on panel, she was not yet considered dead. In
X-Men: The 198 Files, it is revealed that Cecilia's older non-mutant brother, Colonel Miguel Reyes, had been assigned to head
O*N*E security on the Xavier School grounds, with the purpose of finding out the fate of his sister.
Return Cecilia Reyes is revealed to have survived Neverland and now volunteers at local homeless shelters. The
NYX teenagers bring an injured
Tatiana Caban to her for help. During their visit to her apartment she does not reveal to the teens that she used to be part of the X-Men. After treating Tatiana, she offers them a place to rest while she goes out for a few hours. Unaware
Kiden Nixon is following her, she calls up Beast to ask a favor. Later when Reyes returns with groceries, she finds the teens have left. Sometime after these events, Reyes moves to the X-Men's new base of operations; Utopia.
The Five Lights After the events of
Second Coming, Cecilia Reyes is partnered with
Psylocke and sent to Mexico to locate the second of the Five Lights; the first mutants to manifest powers since M-Day. After sedating
Gabriel Cohuelo, she informs his parents of what is transpiring and offers him help from the X-Men. Psylocke comes to the room and explains that something has happened, Gabriel's manifesting ability to slow time around him causes him to appear to be moving so fast that he is invisible to the naked eye. Psylocke taps into Reyes' powers to create a force field around Gabriel's room so contain him until
Hope Summers arrives.
X-23 Gambit and X-23 arrive in New York City following a lead from London. Gambit is injured, with his wounds reopening later on. They visit Cecilia Reyes at her apartment, and she agrees to give Gambit stitches, but is perturbed at being disturbed and admits she left Utopia to avoid such "stupidity". X-23 picks up the scents of her friends from NYX in the apartment, and asks where they are. Reyes states that she gave them permission to stay there before she went to Utopia, but they were gone by the time she returned. X-23 leaves to pursue a lead, and the city is soon hit by a mysterious earthquake. Reyes and Gambit help rescue and treat quake victims. Reyes then accompanies Gambit as he searches for X-23, eventually finding her recovering in the care of the
Future Foundation.
Fear Itself During the "
Fear Itself" storyline, Cecilia Reyes is added to a team of X-Men opposing the "worthy" empowered
Juggernaut in the form of Kuurth: Breaker of Stone. She is instructed by Cyclops to protect a mob of anti-mutant protesters following Kuurth's attack.
Astonishing X-Men Although she is still more comfortable healing humans than fighting superhumans, Cecilia Reyes is part of the new team composed by
Wolverine. Alongside
Northstar, Iceman,
Beast, Gambit, and
Warbird, she assists to Northstar's wedding and tries to help
Karma, whose mind has been taken over Ms. Hatchi for yet unknown reasons. She is also carrying on a romantic relationship with Gambit.
Dawn of X In the new status quo for mutants post
House of X and Powers of X, Professor X and Magneto invite all mutants to live on
Krakoa and welcome even former enemies into their fold. Cecilia Reyes becomes something of a medical expert on mutant biology, running medical operations, autopsies and the like. She is also approached by
Prodigy of X-Factor with a suggestion to build a body farm to study the effects of decomposition on mutant bodies. ==Powers and abilities==