Deadpool- Wade Wilson
Wade Wilson just an ordinary guy, but he had his own family problems. He lived in Ohio, He ran away from home going all over the country learn how to perfect his military arts.
Once he perfected his military skills he started his journey of becoming a mercenary and life was going on normal until he was diagnosed with cancer and given a short time to live. This is when he joined the Weapon-X testing.
This program gave him similar superpowers to wolverine, with these powers now he wanted to get himself a superhero name, he found his name from a pool of names of people who would be dying soon.
He is now just floating around trying to keep the world in order in his crazy little way.