Kiriha Kuze 紅瀬桐葉

Kohei's classmate. Kiriha is a vampire servant, which makes her immortal and gives her superhuman powers. She doesn't need blood and has lost her sense of taste.

Kiriha is most often seen alone, and will not talk much, even when spoken to directly. She does not have many interests, and is in no clubs. However, she has been exceptional in math ever since she was young.