A second-year student and vice-president of the student council. She is in the 2-1 class with Oku. She seemed to have no friends in her class at first, so she spent most of her time in the student council room. The student council president Hajime is her cousin and calls her "Tsuzu".

Spoiler

During the school festival, she starts to befriend Oku and Hana's group, and this helps her to open up more to her other classmates.