The primary antagonist of RESTART; she is the one who abducted the other Magical Girls and forced them into a death game. She dresses as a mad scientist as her Magical Girl attire. She is obsessed with the idea that Magical Girls must be pure and innocent and despises people like Cranberry who tarnished that image; this hatred for Cranberry runs so deep that she even hates her victims, seeing their survival as proof that they were willing to betray the ideals of the Magical Girl to save themselves. She is similarly obsessed with Snow White, whom she views as the "ideal Magical Girl" who won Cranberry’s death game without killing anyone. Her ability lets her create a cyber world. While in this cyber world, she is all-powerful, being able to make anything she thinks of real.

Magical Girl Raising Project
For many individuals in N-City, playing the popular social role-playing game Magical Girl Raising Project is as close as they could come to being a real magical girl. However, for some rare players, that dream can become a reality. One such girl is Koyuki Himekawa, who receives a notification one night that she has been selected to become a magical girl, her in-game avatar Snow White. As Koyuki and other chosen players in the city begin helping those in need, they all receive yet another notification: the admins have decided that they want to reduce the number of magical girls. Whoever collects the least amount of Magical Candies—which are awarded for their magical girl activities—in their competition each week will lose their powers. But when a real-world tragedy happens to the first player that drops out, they are shown the repercussions of losing their abilities. As more participants inevitably lose the competition and more twisted rules are added, the girls soon realize that their "contest" is actually a desperate fight for survival.