Aizawa Haruka

She has a gentle and kind personality that matches her soft appearance.
Her youthful playfulness also contributes to her popularity among students of both genders.

Since she was assigned to the school, she has been interacting with Yuuka, her younger sister, and their relationship is closer than that of a typical teacher and student. She is vaguely aware that Yuuka harbors feelings for her that go beyond the teacher-student relationship, and she doesn't dislike her for it.
However, due to their respective positions, they have refrained from getting too involved with each other.

While she welcomes her mother's remarriage, she feels both joy and confusion about living with Yuuka.