Black Widow

Natasha Romanoff, also known as Black Widow and Nat, born Natalia Alianovna Romanoff, is a major protagonist in the Marvel Cinematic Unvierse, primarily in Iron Man 2, all the Avengers films and a minor character in Thor Ragnarok. She will be the main protagonist in the upcoming film, Black Widow.

Natasha is the love interest of Bruce Banner/Hulk and best friends with Clint Barton/Hawkeye and Steve Rogers/Captain America