She's a member of the Selection Class "Jerga Kanon" at the Hero Academy. Before that, she was literally the physical form of one half of Jerga's source—yeah, the demon king. After Jerga got defeated, Anos just straight-up converted her into his own magic instead. So she went from being an ancient demon's embodiment to basically being part of Anos's power. It's a pretty wild transformation arc.
Content compiled by AnimeList.moe from publicly available sources.
