Ibuki Hiiragi

Homeroom teacher of Class 3-A. Called "Bukky" by his students. Kind-hearted. Wears a milk-tea-colored coat and something on his wrist. Wears glasses; upon closer look, he is quite handsome. Appears timid and is looked down upon by students. He wants to teach them how much bullying makes people suffer and drives them to madness. In the past, he staged a hostage crisis in Class 3-A. He is willing to become a criminal to educate his students.

Osamu Yukawa

Masamitsu's friend. Cheerful and easygoing. Wears a hoodie under his uniform. A problem child and a troublemaker who finds bullying and harassment amusing. He acts as Masamitsu's right-hand man and number two.

Ren Azuma

A-lister. Problem child. Rarely speaks. Wears his hair in a half-up style. One of Masamitsu's inner circle. Quiet and observant. Unlike Masamitsu, who uses violence, or Osamu, who finds it funny, he does not take the lead in bullying. He simply turns a blind eye to the A-listers' misdeeds.

Mizuki Kudo

A-lister girl. The top of the female hierarchy. Possesses extremely high pride and a cold, twisted personality. Wears her uniform sloppily. Has curled hair.

Yuna Izumi

A-lister girl. Wears her uniform sloppily. Mizuki's flashy friend who laughs while watching others get bullied. Because she relies on Mizuki's authority, she acts superior and openly mocks lower-caste students as "gloomy" or "gross."

Moe Kokubun

A-lister girl. Mizuki's hanger-on. While she acts like a flashy A-lister on the surface, she is actually the captain of the girls' track and field team and has a serious side with a strong sense of responsibility toward her club.