A graduate of the JCC Assassination Department. During her JCC days, she was famous as part of the 'Troublemaker Quartet' along with Sakamoto, Nagumo, and Guest. She has the ability to see the 'paths of killing.' A former member of ORDER, she is currently a teacher in the JCC Special Assassination Department. She is the aunt of JCC student Akao Akira (perhaps because of this, while she likes touching other people's hair in general, she especially loves messing with Akira's hair). She is a 27-year-old woman with blue hair and golden eyes.

A graduate of the JCC Assassination Department. During his JCC days, he was famous as part of the 'Troublemaker Quartet' along with Sakamoto, Akao, and Guest. He has the ability to handle anything with mastery. A former member of ORDER, he is currently an intelligence agent and teacher at JCC. He is extremely skilled in disguise. He is a 27-year-old man with black hair and black eyes, possessing an incredibly handsome, youthful face.

A graduate of the JCC Assassination Department. During his JCC days, he was famous as part of the 'Troublemaker Quartet' along with Akao, Nagumo, and Guest. He has the ability to turn anything in his vicinity into a weapon. A former member of ORDER, he is currently a teacher in the JCC Weapon Manufacturing Department. He is a 27-year-old man with white hair and black eyes.

A 1st-year student in the Assassination Department. She is the niece of JCC teacher Akao Rion. She has a thoughtful and introverted personality. When she sees someone being bullied, she worries for them, and she often shows a clumsy side, bowing and apologizing after shooting someone. She has a gentle and kind nature. With her cowlick and rabbit-like eyes, she gives off the impression of a small herbivore. However, when she becomes extremely angry, her eyes turn terrifying and her personality completely changes. As kind as she usually is, she becomes truly frightening once provoked.

A 1st-year student in the Assassination Department. On the surface, he looks like a sensible person and is generally easygoing, but his true nature is rougher and more hot-tempered than one might think. Still, he gets along well with other friends and especially respects and follows Sakamoto Taro.

A 1st-year student in the Assassination Department. He is Seba Natsuki's younger brother. Similar to his brother Natsuki, he is the type to focus on his own work. However, his sensitive nature, including mysophobia and a casual way of speaking, remains, contrasting with Natsuki's more relaxed and calm personality. He is close with Akira and Shin.

A 2nd-year student in the Weapon Manufacturing Department. He is Seba Mafuyu's older brother. He can be a bit selfish and moves at his own pace, often ignoring others or using them for his own gain, but he is generally quite good at maintaining relationships. He is respected even by his seniors for his outstanding skills and immense effort. He also possesses a flexible mindset, allowing him to communicate well with others and listen when they ask for help. In short, he is very socially adept.

A 1st-year student in the Assassination Department. She once gave off a madwoman vibe because of her obsession with Sakamoto Taro, threatening to kill anyone who insulted him, but her actual personality is just that of an extreme otaku (so she doesn't actually like killing that much). Though she has a selfish side, she is a girl who wishes for a normal school life.

A 1st-year student in the Assassination Department. He is extremely shy and has trouble speaking. He utilizes a combat style based on highly developed hearing, and he usually wears a ushanka to reduce the strain on his ears.

A 1st-year student in the Assassination Department. Possessor of top-tier intelligence. While he is cynical and sensitive, his fundamental nature is kind and diligent, so his sociability isn't bad. For example, there are times when Amane says something controversial, but when his friends call him out, he apologizes, they understand each other, and it ends on a heartwarming note.