Marvel Character : Colossus

Piotr "Peter" Nikolaievitch Rasputin also known as Colossus where during his young age, he uses his mutant powers to aid his family away from danger.There was a time when he transformed himself into a steel when his sister is in danger on runaway tractor. After that event he was contacted by Professor Xavier to be a part of X-Men and so he agreed to join.Source here

He then practiced himself on School for Gifted Youngsters after a mission on recuing the original X-Men team members from Krakoa.Professor Xavier given the code name "Colossus". He has organic steel form which gives him in armor state and has superhuman strength, superhuman stamina, superhuman durability and superhuman speed even if his weight is really heavy.Source here

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