Spider-Man (Earth-TRN123)

Spider-Man (Real name Peter Parker), is a New York based teenage vigilante, with the superhuman abilities], after being bitten by a genetic spider. On request by the super spy, Nick Fury, operates as a S.H.E.I.L.D. trainee along with other teenage superheroes.

Early life
Peter Parker's parents were killed when he was young. He was raised by his Aunt May and Uncle Ben. However, soon after he got powers, Ben died due to his inaction. He then vowed to use his powers to help others.

Newfound powers
After being bitten by a genetically altered spider, young Peter Parker gained special abilities sililar to those of a spider. Presumably he tried to use these new powers to make money via a wrestler career, and after his Uncle Ben was killed by a burglar he would have stopped hours later, he realized that with great power, comes great responibility, and started using his abilities in a crime-fighting career as Spider-Man.

Spider-Man
After one year as vigilante, Spider-Man's activities were the focus of attention of Nick Fury, director of the pacifist task force S.H.I.E.L.D., and wanted to train Spider-Man to make him a better hero, the "Ultimate Spider-Man".