My Favorite Avengers!
Iron Man

A wealthy American business magnate, playboy, and ingenious scientist, Anthony Edward "Tony" Stark (Robert Downey JR.)suffers a severe chest injury during a kidnapping. When his captors attempt to force him to build a weapon of mass destruction, he instead creates a mechanized suit of armor to save his life and escape captivity. Later, Stark develops his suit, adding weapons and other technological devices he designed through his company, Stark Industries. He uses the suit and successive versions to protect the world as Iron Man. Although at first concealing his true identity, Stark eventually publicly reveals himself to be Iron Man.
Black Widow

Natalia Alianovna "Natasha" Romanoff, also known as Black Widow, was one of the most talented spies and assassins in the entire world and a founding member of the Avengers. Originally a KGB operative and dangerous assassin, Romanoff was recruited into S.H.I.E.L.D. by Clint Barton. Having extensive mastery in martial arts and armed with her Widow's Bite, Black Widow became one of S.H.I.E.L.D.'s most efficient agents. During one mission, she was sent undercover into Stark Industries to watch Tony Stark due to the fear that he was dying. During this mission, Romanoff assisted Stark with defeating Ivan Vanko's terrorist plots against him.
Thor

Thor is the "God of Thunder", a member of the race known as the Asgardians, a group of humanoid beings from the pocket dimension of Asgard, the Realm Eternal. Thor is the son of Odin, the king of Asgard. Armed with his enchanted hammer Mjolnir, which helps him to channel his energies, he became the mightiest warrior in the Ten Realms. When his irresponsible and impetuous behavior became too much, Odin sent him to Midgard (Earth) as a disabled mortal medical student named Donald Blake, stripped of his memory. After learning humility he regained his memory as well as his godly powers. Thor went on to become one of the founding members of the Avengers; "Earth's Mightiest Heroes".