Colossus (Piotr Nikolaievitch Rasputin) is a fictional character, a superhero in the Marvel Comics universe. Created by writer Len Wein and illustrator Dave Cockrum, he first appeared in Giant-Size X-Men #1 (May 1975). A Russia mutant, the character is a member of the X-Men, and is by far the physically strongest X-Man. Able to transform into a strong metallic form, even without his powers he still cuts a physically imposing figure standing at 6'7". Throughout the series he has been portrayed as a quiet, shy character, honest and innocent. He's now a man without a family, having lost all whom he's ever loved including his parents, brother, sister and even Kitty Pryde, his primary romantic interest. He has had a fairly consistent presence in X-Men-related comic book since his debut. A talented artist, he only reluctantly agrees to use his powers in combat, feeling it is his responsibility to use his abilities for the betterment of human and mutant-kind.
Canadian actor Daniel Cudmore has portrayed Colossus in both X2: X-Men United and X-Men: The Last Stand. Wizard Magazine ranked Colossus 184 on the Top 200 Comic Book Characters of All Time.
A mainstay of the X-Men comic book series until the 1990s, Colossus then went on to appear regularly in the first series of Excalibur. While a member of the team, he had his own self-titled one-shot which depicted him and his teammate Meggan battling Arcade at his new Murderworld facility.
After returning to the X-Men alongside Excalibur teammates, Shadowcat and Nightcrawler, he stayed with the title until his death. He was later resurrected and was a regular in the third series of Astonishing X-Men, written by Joss Whedon. He was the feature of a limited series, Colossus: Bloodlines which had him journey back to Russia. Colossus has since returned to his status as an X-Men mainstay, appearing in various X-Men related titles such as X-Men: Manifest Destiny, Secret Invasion: X-Men, X-Men, and Astonishing X-Men.
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Official Site: Marvel Comics
Links: Wikipedia: Colossus Uncannyxmen.net: Colossus Marvel.com: Colossus