Black Widow from The Avengers.
Black Widow is a fictional superhero appearing in comic books published by Marvel Comics. Created by editor and plotter Stan Lee, scripter Don Rico, and artist Don Heck, the character first appeared in Tales of Suspense No. 52 (April 1964). The character was first introduced as a Russian spy, an antagonist of the superhero Iron Man. She later defected to the United States, becoming an agent of the fictional spy agency S.H.I.E.L.D., and a member of the superhero team the Avengers.