Vapor's history prior to being recruited as a technincal specialist by Simon Utrecht has yet to be revealed. She, along with her brother, was among the small group led by Utrecht to simulate the crash that gave the Fantastic Four their powers, and has remained with the U-Foes ever since.
Alongside her teammates, she has had encounters with Hulk, Avengers, Spider-Man, Crossfire, Puma, Darkhawk, and Portal.
