Scarlet Witch

Scarlet Witch is a mutant sorceress who is the daughter of Magneto, and brother of Quicksilver. Sometime after her childhood, Wanda went to study under Agatha Harkness so that she could control her mutant powers through magic. Sometime later, she got a job as Tony Stark’s physical therapist.

On Iron Man, Wanda is working as Tony Stark’s physical therapist slash member of Force Works. Wanda is romantically interested in Tony and competes with Spider-Woman for Tony’s affections. No background is given for Wanda and she doesn’t receive much screen time other than add magic help where it is needed.

In season two, she and the other members of Forceworks leave Tony because of his rational behavior. She returns in the series finale. Again, she has no real part other than extra power for Force Works.

She later appears in the X-Men show. The twins Scarlet Witch and Quicksilver, called to their father's bedside in the Balkan Mountains, learn that they must travel to a hidden Shangri La-like mountain valley. Meanwhile, Magneto is searching for his two children who later turn out to be Wanda and Quicksilver.

Witch later appears in a more major role in Avengers: United They Stand as a member of the team. Here, she is shown to be in love with Wonder Man, who is helping her learn to control her powers. When Wonder Man kidnapped by Ultron and put in a sleep, Ant Man uses Wonder Man’s brain waves to turn Vision good. As a result, Vision falls in love with Wanda. Wanda seems to feel the same way but doesn’t want to betray Wonder Man.

Upon seeing how much Wanda loves Wonder Man, he decides to use himself as bait to lure Ultron out. Wanda disapproves because she doesn’t want to loose Vision too. Vision goes on with the plan anyway. It works, and the Avengers now have Wonder Man’s body. They try many technological means to revive him but none work.

Wanda then realizes that if technology won’t work, maybe mysticism will. Wanda and Vision go to Wanda’s old mentor Agatha Harkness, but she reveals that a great evil that she must battle is approaching. The evil is Agatha’s son, Nicholas Scratch. Scratch kidnaps his own mother. Scratch plans an unfair trial for his mother where she would be sentenced to death, fortunately, Agatha granted her powers to Wanda so that she could defeat Scratch before he killed her. Wanda also uses these powers to revive Wonder Man at last.

Wanda and Wonder Man start to date again after that. Wanda, however, still has feelings for Vision. After defeating Zodiac, Wanda tells Wonder Man how she feels. He tells her that there is only one option, for her to go back to Vision. She and Vision get back together.