Wanda Maximoff was a native of the Eastern European country of Sokovia who grew up with her twin brother, Pietro. In an effort to help purge their country of strife, the twins agreed to undergo experiments with the Scepter under the supervision of Wolfgang von Strucker's HYDRA cell, and received superpowers as a result, with Wanda attaining various abilities including telekinesis, telepathy, and energy manipulation.
Real Name: Wanda Maximoff
Portrayed by: Elizabeth Olsen
1. Avengers: Age of Ultron
When HYDRA fell, the twins joined the robot Ultron to get their revenge on Tony Stark, but eventually switched sides and joined the Avengers when they discovered Ultron's true intentions.
2. Captain America: Civil War
Although Pietro was killed during the ensuing Ultron Offensive, Wanda survived and became a member of the Avengers. During the Avengers Civil War, she sided with Captain America and was briefly imprisoned in the Raft before Rogers freed her along with his teammates.
3. Avengers: Infinity War
Over the next few years, Wanda reunited and reconciled with Vision, and together the two started living off the grid in Europe, forming a romantic relationship. However, the two soon came under threat from Thanos and the Black Order, who sought the Infinity Stone in Vision's head.
After coming under attack by the Order, the two Avengers reunited with their teammates and sought refuge in Wakanda. Wanda partook in the city's defense when the Black Order launched a major assault against it, and during the battle, she managed to destroy the Mind Stone in attempt to stop Thanos, killing Vision in the process.
However, using the Time Stone to reverse Vision's destruction, the Mad Titan seized the stone from Vision allowing him to complete the Infinity Gauntlet; Wanda was subsequently disintegrated in the aftermath alongside Bucky Barnes, Groot, Sam Wilson and T'Challa.