The protagonist Junichi's stepsister who shares the same birthday with him.

She wears a small bell around her neck that Junichi gave her.

A serious honor student who serves on the Public Morals Committee with Miharu, popular at school but shows a "scary side" when angry at Junichi.

Though she appears capable at housework, she actually possesses a special talent for creating food so terrible that hitmen might place mail orders for it.