Jubilee...

Full Name: Jubilation Lee
Affiliation: X-Men (New Mutants junior class)
Origin: Unknown, assumed somewhere in California
Powers: Projects blasts of plasma that crackle like fireworks
Background: Jubilee is just a basic mall-rat, preferring to be with her friends and relax than to seriously train to be an X-Man. But, when called upon for training or serious work, she is ready to lend her abilities, charging in with the same blazing, irrepressible style that makes her as dangerous on the battlefield as she is during a big sale. You will know her if you see her, thanks to her favorite bright yellow jacket.

When the New Mutants members Jubilee, Cannonball, and Multiple decided to take the Blackbird and X-Van for joyrides, it was Iceman who led the charge, so to speak. Eventually, they admitted what they had done, much to the delight of Nightcrawler who was just finishing his probation, and had been cleaning up their messes.

The next day, after running from the police, Berzerker led most of the New Mutants, except for Iceman, into the Morlock tunnels. They have since returned to the X-Men.