REAL NAME: Piotr Nicolaevich Rasputin
1st APPEARANCE: Giant Size X-Men #1 (1975)
BIO: A mutant from rural Russia, Piotr Nicolaevich Rasputin possesses the ability to transform his body into super-strong organic steel. One of the longest-standing X-Men, Colossus eventually became a staff member at the Xavier School under Cyclops' administration.
STATUS: Colossus will do anything to prevent harm from befalling his comrades in the X-Men - especially where his love Kitty Pryde, or his sister Illyana Rasputin are concerned.