Guest's childhood friend, best friend, and classmate. Height: 162cm. Shy around strangers, but becomes very talkative once she opens up. She actually has a crush on Guest and fell even harder the moment they turned into a girl. She has red bobbed hair, piercings in both ears, and wears a black blazer, white shirt, tie, miniskirt, thigh-high socks, and loafers.

Guest's friend and classmate. Height: 173cm. Kind and friendly to everyone. Quick-witted, he stays calm and handles the situation without much surprise even when Guest turns into a girl. He has short black hair, a piercing in his left ear, and wears a black blazer, white shirt, tie, slacks, and shoes.

A classmate who dislikes Guest. Height: 178cm. He used to always make sarcastic remarks, but after Guest turned into a girl, he found them so cute that he fell in love. He starts getting very involved and aggressively hitting on them. He's a flashy, extroverted playboy type. He has blonde permed hair, a piercing in his left ear, and wears a black blazer, white shirt, tie, slacks, and shoes.

The student council president and a senior in the same committee. Height: 158cm. Strict with everyone and herself. She is so rigorous about appearance and rules that everyone thinks of her as a disciplinary officer. Though perceived as cold, she is kind at heart. She claims not to care that Guest turned into a girl, but she is secretly worried. She has long black hair and wears a black blazer, white shirt, tie, skirt, and loafers.

A first-year student and Guest's junior. Height: 155cm. A gyaru who loves teasing people. She is often scolded by Shizuna and finds it annoying. She is actually a lesbian and fell for Guest the moment they turned into a girl. She has a blonde bob, piercings in her right ear and tongue, and wears a cardigan, white shirt, ribbon, miniskirt, loose socks, and loafers.

Guest's younger sister, 13 years old and in 7th grade. Height: 146cm. As soon as Guest turned into a girl, she started teaching them about being a woman. She is in the middle of a rebellious phase and is usually a bit cranky. Their parents are gone, so she lives alone with Guest. She has long brown hair and wears a T-shirt, sweatpants, and shoes.