Real Name: Unknown
Stacy X has copper snake-like skin and the ability to control hormones by secreting pheromones through her skin. She can control her pheromones to induce a variety of sensations, from nausea to extreme pleasure, or she can just give a slight adrenaline boost. Stacy also has some hand-to-hand combat skills, enough to spar with Wolverine for short bouts.
After manifesting her mutation, Stacy apparently ran away from home and was recruited into the X-Ranch, which was basically a mutant brothel, though it seems that few, if any, of the girls there actually had to touch their customers to provide them with a sensual experience. Stacy was one of the few, requiring at least some skin-to-skin contact for her power to work.
Shortly after the existence of the X-Ranch became known to Archangel, who was one of its primary investors, the X-Men sent Iceman there as a "Mr. Fries," and he was assigned to Stacy. While Stacy was in session with Iceman, Archangel burst in and tried to "bust" her, but they were interrupted by and attack from the Church of Humanity. The "priests" killed everyone at the ranch except Stacy, who was saved by the X-Men. Stacy stayed with the X-Men for a number of raids on the Church, and was basically accepted into the team. After one raid, Stacy accidentally activated one of the teleporting devices captured from the Church and found herself in their headquarters.
Though tortured the Supreme Pontiff of the Church, Stacy refused to give up information, instead making up a life story that resembled Marvel Girl's, as if Stacy herself was a founding member of the X-Men. Whether any of the parts of Stacy's story surrounding her "life before the X-Men" are true is unknown, as is the reason she chose that particular lie.
After being rescued by the X-Men, Stacy returned to the Institute, but took a "break" shortly afterwards to "service" a special client in Chappaqua, NY. Wolverine tracked her down and fought with her, but soon came to an understanding. Whether he convinced Stacy to completely abandon her former profession is unknown, but Logan did talk Kurt out of whatever censure he was contemplating. It was known that Stacy continued to "work" for special clients even as she operated as a member of the X-Men.
However, the life at the Institute was not suitable for Stacy, especially when she noticed that she couldn't get the males (such as Nightcrawler and more importantly, Archangel) to respond to her advances. When Warren started to become closer with Husk, Stacy left the Mansion, leaving behind a nude workout video of herself for Warren to watch. He did so, not knowing what the contents were at first, and then found himself watching when Paige entered. Warren denied any feelings for Stacy and closed her out of his thoughts forever. Where Stacy went is unknown.
"Meanwhile, actress and singer/songwriter Kate Nauta may be up for another role in X3 as well. Nauta, who stars as a lingerie-clad assassin in producer Luc Besson's new film The Transporter 2 is being rumored for the part of Stacy X, a mutant who secretes a special pheromone to seduce men."
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This is from the latest Generation M where we get to se Stacy again. I first uploaded the images but then realised they might contain certain language that one needs to be aware of before they watch it. Although trust me it's not as bad as it sounds. If anyone is offended I'll make them go away. I've never gotten how to delete a post myself but I'll contact Paola.