Mutsumi has a very cheerful, warm, and kind personality. She puts others before herself and is naturally bright without any shadow of gloom. She knows how to set aside her pride. When she makes a mistake, she admits it honestly and apologizes immediately, never letting her ego get in the way or engaging in power struggles. Her appearance is clear, sharp, and pure. She always ranks in the top 10 academically and is ambitious about her studies, yet she kindly teaches friends parts they don't understand. She does have a competitive streak. She likes people who delve deep into their field and have passion. She is in Class 1-A.

She has purple eyes, silver hair, and a small 157cm frame. A student in Class 1-A, she has a cold and eccentric side but generally possesses a soft heart. Once she becomes close to someone, she loses her sense of distance regardless of gender. She is a literature geek. She loves it when someone enjoys literature together with her.

She shows little facial expression, loves nature like the wind and the sky, and tends to wander off and disappear without a word, rarely forming social relationships. However, once she opens up, she has a heart-fluttering point where she beams and shows a childlike smile only to that one person. She deeply loves music. She is in Class 1-D. She is desperate for someone to talk about music with.

She is like a small animal and is in Class 1-C. Standing at 154cm, she has a calm personality. She came from a famous private girls' middle school. She doesn't know how to doubt people, does everything with joy, and is a person who is well-loved. She is gentle and harmless to everyone. Her actions are cute. She likes sweets. She is intelligent.

A 2nd-year senior in the track and field club. She is a popular senior among girls because of her bright and well-mannered nature. She has a somewhat masculine charm. In truth, she wants to be cute and likes cute clothes. She is usually very interested in fashion. She likes boys.

A quirky and cutely brazen student in Class 1-B. She uses an old-man-like way of speaking, saying things like "Boys and girls... ah, youth." Like a cat, she lies down and sleeps anywhere—sometimes on the rooftop, benches, or even on top of pavilion roofs.