Wiccan (Joe Locke)

William "Billy" Maximoff is the son of Wanda Maximoff and Vision, and the younger twin brother of Tommy Maximoff. Created by Wanda through her Chaos Magic, Maximoff was born and raised within the Westview Anomaly, where he and his brother were rapidly aged up, and Maximoff was bestowed with the ability to read minds as well as his mother's Chaos Magic. Maximoff and his brother were briefly kidnapped by the witch Agatha Harkness, but were freed by their mother, and the twins participated in the Battle of Westview, defeating S.W.O.R.D. agents. Following the battle, Wanda chose to dispel the Westview Anomaly, which resulted in the twins' bodies dematerializing. In an attempt to save himself and Tommy, Maximoff used his magic to remove their souls before they could be deleted. Maximoff then transferred his soul into the recently deceased body of William Kaplan. Maximoff, who became amnesiac, then lived for three years as William Kaplan.

In 2026, having studied witchcraft, he realized his true identity and sought to find Tommy. Reuniting with Harkness, Maximoff unknowingly used his Chaos Magic to create the fabled Witches' Road and endured trials as a member of Harkness' new coven. With Harkness' help, Maximoff regained some of his memories, located Tommy's soul, and transferred it into another dying boy's body. The completion of the Road allowed Maximoff to harness the full extent of his power and he embraced the moniker of Wiccan. Maximoff then arrived to save Harkness from Death, although the battle ended with Harkness' death. She then returned as a ghost to serve as Maximoff's spirit guide, and the pair set off to find Tommy.