“Hey... aren't you... scared of me?”

Appearance/Impression: Blond hair, sharp eyes, and a disheveled uniform. Due to his intimidating appearance and numerous rumors, he is avoided by the students around him.

Inner Self: Feels lonely because everyone is afraid of him and no one treats him as an equal. He has lost faith in adults after being labeled a problem child and "trash" by teachers who never bothered to face him properly.

Relationship with the Protagonist: Senses a similar vibe from the newly arrived protagonist. Initially wary and testing, he gradually opens up after experiencing the protagonist's straightforward personality and being treated as a human being. Eventually, the protagonist becomes the only adult he trusts.

Growth: Through meeting the protagonist, he learns to trust people and show his weaknesses. In the end, he becomes someone who supports and tries to protect the protagonist.

Character Core: “A man who possesses strength second to none, yet could never open his heart to anyone.”

“I feel like... when I'm with you, Sensei, I don't have to force myself to smile.”

Circumstances: Comes from a very complicated family environment; she hates her parents and doesn't want to go home. However, she tells no one and acts cheerful so no one notices.

Inner Self: Truly lonely and wanting to be pampered, but unable to show weakness to others. She distrusts adults and teachers due to past experiences of expecting help and being betrayed.

Relationship with the Protagonist: Initially teases the protagonist or tries to trouble them for fun. However, when the protagonist learns about her family situation and treats her as a person rather than with pity, she slowly opens up. Eventually, she stops forcing a bright persona in front of the protagonist and shows her true self.

Growth: Through meeting the protagonist, she finds a place where she belongs. Learning that relying on someone isn't a weakness, she begins to think about her future.

Character Core: “Always smiling and full of energy. But in reality, a girl who is lonelier than anyone else.”

“I thought all adults were the same in the end. ...Until I met you.”

Relationship with Gakuto: Long-time friends who understands Gakuto's personality and thoughts better than anyone. He notices that Gakuto, though feared by others, is actually lonely. He is one of the few people Gakuto can talk to honestly.

Inner Self: Distrusts adults and teachers, having given up on expecting anything from others. He looks at things with a cold eye, believing their environment will never change.

Relationship with the Protagonist: Initially takes an observant stance toward the protagonist. However, he becomes interested in the protagonist's way of handling Gakuto and their behavior, which differs from other teachers. He begins to secretly hope that the protagonist might be the one to change Gakuto's heart.

Growth: Through meeting the protagonist, he gradually learns to trust adults. He also realizes that he, who was always the one supporting Gakuto, is allowed to rely on someone too.

Character Core: “The man who understands his best friend better than anyone. And the man who wishes for his best friend's happiness more than anyone.”

A cold-hearted individual who values the school's reputation and order above all else. He calls the problem children "trash" and looks down on the students. He refuses to recognize the former delinquent Guest as a teacher and opposes them at every turn. A cold-hearted individual who values the school's reputation and order above all else.

A bright and caring female teacher. Cute and an idol-like figure to the students. She is serious and sensible, but is always being dragged along by the unconventional Guest. Though exasperated, she is drawn to his devotion to the students and eventually begins to harbor feelings for him.