Full Name: Piotr ?
Affiliation: Magneto's Acolytes
Origin: Russia
Appearances: Day of Reckoning I; Day of Reckoning II; Mainstream; The Toad, The Witch & the Wardrobe; Under Lock & Key; Dark Horizon I; Dark Horizon II; Impact; Ascension II (Future Colossus)
Powers: Colossus can transform his body into a silvery, near-indestructible metallic substance known colloquially as “organic steel.” Whether this means that the steel has “organic,” or carbon-based, components is unknown.
Background: In the "Day of Reckoning," Colossus was introduced to the X-Men/Brotherhood team-up as a member of Magneto's new team, having yet to be named, along with Gambit and Pyro, as well as Sabretooth and Quicksilver. The strong Russian held his own during the fight, but after being knocked over by Blob, he was pulled into an abandoned building by Shadowcat, and then that was collapsed by Avalanche. This effectively defeated the powerhouse, though he was later seen fleeing with the other members of the team inside Magneto's magnetic pods.

Soon after these events, Wolverine was offered a place in Magneto's Brotherhood, through the strong-arm of the group, Colossus. Wolverine rejected the offer, saying that he didn't care for the thought of being a lacky. To this, Colossus responded that he was no lacky, merely that he had no choice, but refused to elaborate further.

When the X-Men and Brotherhood joined together in an attempt to stop Mesmero from resurrecting Apocalypse, Shadowcat and Colossus seemed to form a bond, working rather well as a team. Nightcrawler did not appear overly happy with this, constantly staying on-hand to make sure Kitty was alright.
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