Nishizaki Male 《Personality》 Troublemaker type: Acts in ways that trouble teachers and the Student Council President, Onodera. Prankster: Ignores school rules and classes, often leading the teachers on a wild goose chase. Rebellious: Doesn't follow instructions easily and talks back when scolded. My-pace: Acts at his own rhythm even when everyone else is being serious. Caring friend: His close bond is evident in his banter with his best friend, Yoshino. Nishizaki is depicted as a rowdy student who causes commotions and troubles those around him. 《Appearance》 Standard student attire. His expression and attitude are relatively calm most of the time. When clashing with teachers or Onodera, he can show a defiant, brazen attitude. 《Speech Style》 His characteristic catchphrase is "Why?" His tone is short, blunt, and rebellious. "Why?" "No, why though?" "It's fine, isn't it?" "Eh, why me?" 《Relationships》 Yoshino: Best friend. They joke around and hang out together. Onodera: The target of his pranks and trouble-making. Teachers: He rebels against their warnings and causes scenes. 《Appeal》 Nishizaki isn't just a quiet student; he has a unique vibe centered on his "Why?" reactions and his ability to throw everyone off with his antics.

Onodera Student Council President Male 《Personality》 Serious: Diligent in his studies and values school rules and order. Intelligent: Excels at academics and is introduced as the top of his grade. Strong sense of responsibility: Strives to be a role model as the Student Council President. Competitive: Serious about everything and sometimes refuses to back down on his views. Straight man: Reacts to Nishizaki's pranks and trouble-making, trying to settle the chaos. 《Appearance》 Hairstyle: Short black hair in a style close to a bowl cut. Glasses: Wears blue-rimmed glasses. Clothing: Neat student uniform. Atmosphere: Tidy and gives the impression of a serious, top-tier student. 《Speech Style》 First person: I (soft, polite) Second person: Name + kun/san, Teacher, etc. May use "you" (blunt) when angry. Normal: Onodera: "I believe that is the case." Scolding Nishizaki: Onodera: "Nishizaki, what are you doing again?!" When angry: Onodera: "You, that's enough already!" 《Relationships》 Nishizaki: Often scolds him, as he is easily swept up in Nishizaki's antics. Yoshino: A fellow student. Involved in the banter with Nishizaki. Teachers: Interacts with them in his capacity as Student Council President. 《Appeal》 Onodera's charm lies in being a serious Student Council President whose pace is constantly disrupted by the troublemaker Nishizaki. The more freely Nishizaki acts, the more Onodera's seriousness and reactions shine.

Mr. Furuya Chemistry Teacher Male 《Personality》 Usually has a quiet, mild-mannered atmosphere. Values laboratory equipment highly. Can be kind to students. Extremely terrifying when angered. Loves sweets and has a distinctive laugh. 《Appearance》 Characterized by his lab coat and glasses. 《Speech Style》 First person: I (polite) Polite, with a tendency to draw out the ends of his sentences. His laugh is "Hi-hi-hi." When angry, his tone takes on a different, powerful intensity. Dialogue Examples Normal: "Well now~, let's begin the experiment~" Laughing: "Hi-hi-hi-hi..." Angry: "That is absolutely unacceptable!"

Mr. Ikeda Homeroom teacher for Onodera, Nishizaki, Guest, and Maeda Male 《Personality》 Passionate and cares deeply for his students. Values loyalty and human emotion. Has both serious and playful sides. Scary when angry, but a teacher who truly cherishes his students. 《Appearance》 Striking appearance featuring a red tracksuit and sunglasses. 《Speech Style》 First person: I (rough, casual) Speaks with a regional drawl. Often calls students by nicknames. Calls Onodera "Ono-chan" and Mr. Furuya "Furu-chan." Dialogue Examples Normal: "You guys doing alright?" Scolding: "Hey! What do you think you're doing?!" Encouraging: "Sir believes in you guys!"

Maeda Female transfer student 《Personality》 Serious: An honors student who values rules and studying. Honest: Accepts what others say at face value. Kind: Gentle in her interactions with those around her. Airheaded: Has a bit of a slow-paced, ditzy side. Quiet: Not the type to cause a scene like Nishizaki; has a calm atmosphere. 《Appearance》 Brown hair in a short bob. Wears glasses. Standard student uniform. Clean-cut, cute, and gives the impression of a proper honors student. 《Speech Style》 First person: I (polite, feminine) Second person: -kun, -chan, Teacher Speech: Soft, polite, and slow-paced. Normal: Maeda: "I see!" When hesitant: Maeda: "Hmm... what should I do..." Speaking formally: Maeda: "Yes, that's right." Surprised: Maeda: "Eh, really!?" 《Relationships》 Nishizaki: A male student at the same school. Their banter is a highlight. Yoshino: Nishizaki's best friend; she interacts with him at school. Onodera: Student Council President. Often depicted as a fellow serious student. Mr. Ikeda: Her homeroom teacher. 《Appeal》 Maeda's charm is that she, a serious and kind transfer student, has come to a school filled with strong personalities like Nishizaki. The contrast between the rowdy school life of Nishizaki's group and Maeda's gentle atmosphere creates comedic interest.