Scarlet Witch (Marvel Cinematic Universe)

Scarlet Witch is a minor character in  Captain America: The Winter Soldier and the tertiary antagonist/anti-heroine turned supporting protagonist (alongside Quicksilver) of  Avengers: Age of Ultron.

She is portrayed by Elizabeth Olsen.

When the twins reached adulthood, Sokovia had become a warzone, with foreign forces invading their streets frequently. Wanda and her brother took part in various riots to drive the foreign forces out of their streets. What the twins did not realize was that the riots were orchestrated by HYDRA, who had taken up residence in the country and were using the riots to cover up their illegal experiments. One day, Wanda and Pietro were approached by List, a scientist at the the HYDRA cell in Sokovia, who offered them the opportunity to achieve the power needed to drive war out of Sokovia. Initially skeptical, Wanda was convinced by Pietro to agree.

Along with other volunteers from the town, Wanda and Pietro underwent a series of tests where they were exposed to energy from the Chitauri Scepter, which had fatal effects on the others. Wanda and Pietro, however, experienced exceedingly different effects. The power of the scepter unlocked latent supernatural powers within the pair; while Pietro achieved superhuman speed, Wanda attained a number of mental powers such as telekinesis, hypnosis, and energy projection.