Black Widow (Yost Universe)

Black Widow or Natasha Romanova is a S.HE.I.L.D agent and ex-partner of Hawkeye (Clinton Barton). She is of Russian descent. Widow has long auburn red hair, blue eyes, is 5'7", 131lbs

In the first episodes of "The Avengers", it is revealed that Widow is in fact a double agent but frames it on her partner Hawkeye.