Chitose Azuma

Chitose Azuma (吾妻 あずま, Azuma Chitose) is Mihari Oyama's senpai at the university she attends, as well as the guardian of Nayuta Tenkawa. According to Miharai, she was responsible for perfecting the drug that Mihari developed to turn her brother Mahiro Oyama into a middle-school aged girl. She has since been using Nayuta to keep secret tabs on Mahiro to fulfill an unknown agenda.

Trivia

 * The name Chitose means "thousand" (千) (chi) and "year" (歳) (tose).
 * The name Azuma means "I" (吾) (a) and "wife" (妻) (zuma)