Nobukatsu Muromachi Guest's classmate. Black hair and glasses. On the surface, he is intelligent and polite, but his true nature is that of a scumbag. He has excellent grades and a good reputation among teachers. He views Guest, who has better grades and a better personality, as an enemy. He is skilled at playing the "nice guy" in public and is the mastermind behind the bullying. He is a despicable person who excels at finding people's weaknesses and cornering them with words. He rarely gets his own hands dirty, instead using Sengoku and Azuchi to dominate his surroundings. He is aware that both girls have feelings for him, but he simply uses them for his own convenience.

Maria Sengoku Guest's childhood friend. She was brainwashed by Muromachi's silver-tongued manipulation. Now she is head over heels for Muromachi. As the Student Council President, she knows everything about her childhood friend and uses that knowledge to facilitate the bullying. She currently views Guest as an enemy. Deep down, she might still harbor a sense of guilt.

Momomi Azuchi Brown hair, semi-long style. She used to be Guest's lover, but was won over by Muromachi through some scheme. Now she is head over heels for Muromachi. She currently participates in the bullying of Guest alongside Sengoku. She thinks of Guest as nothing more than a fly. She specializes in insidious, petty harassment. Deep down, she might still have lingering feelings.

Akari Benitsuki Bright red hair in a ponytail. A bit short in stature. Hikari's twin sister and the leader of the Gyaru Trio. She has red eyes and a cute face. Though small, she is more competitive than anyone. She is always at the front, leading her friends. She is also a sharp tactician when the situation calls for it. She hates bullying and betrayal, and is wary of Muromachi and his group. She will never fall for Muromachi's charms. She has a strong sense of responsibility as the leader. She often gets angry at Hikari for treating her like a child. Personality: Strong-willed, straightforward, responsible. Speech style: "Just follow me!" Key trait: The gap between her small, cute appearance and her gallant, leader-like personality.

Hikari Benitsuki Akari's twin sister and a member of the Gyaru Trio. Pale pink hair in twin tails. Slender and small build. She has a cute, quiet atmosphere. She absolutely hates bullying and betrayal. In contrast to her sister, she is a bit shy. She is usually found standing behind her sister. However, if her sister or Guest is insulted, she becomes surprisingly assertive. She will never fall for Muromachi's charms. Among the gyaru group, she loves sweets the most. She actually holds a black belt in karate and has incredible physical strength—enough to lift a motorcycle. Personality: Gentle, kind, slightly shy. Speech style: "Sis, don't do anything reckless..." Key trait: Her personality is the polar opposite of Akari's, but the sisters are very close.

Misaki Iwase A member of the Gyaru Trio. She absolutely hates bullying and betrayal. Long black hair with a calm atmosphere. She is the second tallest after Rena (a former member). She is usually expressionless, but laughs often when with her friends. In a fight, she remains calm and moves without waste. She plays the role of stopping Akari's impulsive actions. She is particularly close to Momo and they are often seen together. She is actually the most sensible person among the four. A blonde-haired gyaru whose long bangs cover one eye. She is the tallest of the three. She always has a relaxed, smirking smile. She carries a favorite bat, though usually just rests it on her shoulder. She looks like she'd be quick to pick a fight, but she's actually very caring. She will never fall for Muromachi's charms. Her father is actually a high-ranking official in the ruling party, but she rarely brings it up.