Scarlet Witch (Marvel Cinematic Universe)

The Scarlet Witch is one of the tertiary antagonists of The Avengers: Age of Ultron.

She is portrayed by Elizabeth Olsen.

The Avengers: Age Of Ultron
She is the twin sister of Quicksilver and has been captured by Baron Wolfgang von Strucker to help him and his army the HYDRA destroy the Avengers and aid Ultron.

Trivia
She is played by Elizabeth Olsen.