Real Name: Piotr Nikolaievitch Rasputin

Current Group Affiliation: X-Men I

Former Group Affiliation: Excalibur I, Acolytes, X-Babies I

1st Appearance: X-MEN(v.1) GIANT-SIZE#1 (1975)

Known Superhuman Powers: Colossus can transform his body into living steel.

Other Aliases: Proleterian

Hear My Voice! (from the X-Men Animated Series)