Miyako "Mizuka" Komagusu
About
She acts rather mature for her age, often chiding the older boys for acting childish, and even scolding her father when he attempts to drink too much. She is shown later to have been possessed by spirits, resulting in her classmates trying to avoid her.
When Tarou told her that she might be the reincarnation of his sister, she freaked out because she has been convincing herself that, "I am me and not anybody else." After this, she seemed to ignore Tarou, as if she had never known him. After her father is hospitalized, she is manipulated by the Oogami group into becoming their new matriarch. However, the efforts of Tarou and his friends prevent this.