She comes from a long line of white-haired women in the Takatori household—all of them responsible for keeping the childlike spirit Omamori happy and content. It's basically her family's job to maintain that relationship, and she's the latest to inherit the duty.
Personality-wise, she's pretty shy and anxious. She apologizes constantly, even in situations where she's clearly not in the wrong. It's the kind of nervous habit that makes her come across as easily intimidated, though whether that's genuinely how she feels or just how she presents herself is harder to say.
Content compiled by AnimeList.moe from publicly available sources.