Ellie Phimister

Ellie Phimister (under the codename Negasonic Teenage Warhead) is a mutant and member of the X-Men. She is Colossus' apprentice.

She and Colossus tried and failed to apprehend Deadpoolfollowing Deadpool's one-man assault on a convoy on a freeway, leading to numerous deaths and endangering the public. They later aided Deadpool in rescuing his girlfriend Vanessa Carlysle from Francis Freeman