Clea

A magical user whose power and stature rival Doctor Strange himself, she's appeared as the Sorcerer Supreme's partner and is no minor character, as she has ...

Despite her misgivings over Strange's love, she asks that the sorcerer remains by her side as she takes the throne of the Dark Dimension. Strange declines and Clea is left to rule alone. She is the lover of that world's Baron Mordo and is eventually killed by Aldrif Doomsdottir, a version of Thor. With the help of a temporal remnant, Clea is able to find Stephen and resurrect him to say goodbye once and for all. She eventually battles Strange in a deadly encounter and murders him while he is in his astral form, taking the title of Sorcerer Supreme by force. Strange learns that the villain sought the powers of the Sorcerer Supreme and is enraged when he discovers that Strange is not only the Ancient One's newest disciple but has recently taken up his mantle. With counsel from the Ancient One, Strange realizes that Clea will never be safe if she remains in her home reality and arranges to remove her from the Dark Dimension. Eventually, Clea joins Strange on Earth, and the extra-dimensional sorceress moves to the Big Apple near the Sanctum Sanctorum on Bleeker Street. If you think moving from the country to the big city is some real culture shock, try relocating to New York City from a parallel hell reality like the Dark Dimension. At the culmination of the story, Strange's non-corporeal self escapes and discovers that his protege and partner Clea is being tortured by Silver Dagger. Following that first encounter, Clea begins to aid Doctor Strange in his many battles with Dormammu, and each time she is punished for her treachery. Clea is also a powerful magical telepath who shares a unique connection specifically with Doctor Strange as a result of their close bond. Though the Sorcerer Supreme — Stephen Strange — hails from New York City, his Clea is the product of an entirely separate dimension — the Dark Dimension. Home of the dread Dormammu, the Dark Dimension is a void within the Marvel Universe, an alternate plane of existence described by some as hell itself. She's fought alongside Doctor Strange and been a part of his team of Defenders. Her adventures have brought her into contact with everyone from Ghost Rider and Man-Thing to Spider-Man and Howard the Duck. As a key member of the Sorcerer Supreme's inner circle, she's been featured alongside him outside of comics too, appearing in video games, animated appearances, and toys. A magical user whose power and stature rival Doctor Strange himself, she's appeared as the Sorcerer Supreme's partner and is no minor character, as she has appeared in plenty of comics through the decades.