Peter was part of the second generation of X-Men, formed by Charles Xavier to save the original X-Men from the living island Krakoa. He agreed to leave the farm community in which he was born to go to the United States with Xavier. Xavier gave him the name "Colossus." After the battle was won, Colossus remained in the United States with the new X-Men. Colossus is typically portrayed as being peaceful, selfless, reluctant to hurt or kill anyone, and always putting himself in danger to protect others.