Although her performance in the recent Captain America: The Winter Soldier certainly pleased fans, her performance in The Avengers is more no-nonsense—a trait truer to the character. It’s her attention to detail that has her on this list. Black Widow is a lying, clever assassin who as at times been a quadruple agent in the comic books. Her scene in The Avengers where she interrogates Loki unbeknownst to him is a perfect example of the shrewd, shady efficiency that is the “red-ledgered” Natasha Romanoff and Johansson executes this flawlessly. Plus, it takes guts to pull a gun on Bruce Banner without blinking or incurring the Incredible Hulk. Johansson’s Romanoff is every bit untrustworthy as Samuel L. Jackson’s Nick Fury.