Eloise ‘Ellie’ Phimister, under the codename Negasonic Teenage Warhead, is a mutant and member of the X-Men. She is Colossus' apprentice. With the power of Nuclear Detonations.

Yukio is the kind and joyous girlfriend of Eloise, with the ability to control and manipulate electricity.

Ellie has Brown Eyes and Short Black Hair which Points up, Pale Fair Skin.

Yukio has Brown Eyes, Straight Pink Hair with Bangs and Light Fair skin.