A member of Anna Yamada's group. A girl with a gyaru appearance and speech style, whom Ichikawa mentally refers to as "Miss Bitch," but she is actually an all-rounder with common sense who can handle both the straight man and funny man roles. She has a large chest. Her grades are higher than Ichikawa's. Thanks to her brother's influence, she is quite knowledgeable about otaku culture. She is constantly looking for guys, but isn't particularly popular and tends to be a bit of a know-it-all when it comes to romance. She was the first to notice the relationship between Ichikawa and Yamada. She is a kind, thoughtful girl who cares for her friends. Despite her strong gyaru image, she has a caring and attentive side. She calls Serina Yoshida "Seri-nya."

A member of Yamada's group and Anna Yamada's best friend. Nicknamed "Chii" or "Bayashiko," she is a reliable person who often looks after Anna Yamada. Ichikawa mentally calls her "The Boyfriend," though the reason is unknown. She is oblivious to romance and surprisingly easy to sway with praise. Additionally, Chihiro is innocent and often does things like an elementary schooler. She is good at basketball, and seeing her score points despite her small stature made Yamada admire her. As Yamada's best friend, she is so attentive to Yamada that even Ichikawa acknowledges it. However, she is quite dense regarding the relationship between Yamada and Ichikawa. Seeing classmates excited for Valentine's Day, she lamented that everyone was becoming an adult while she and Yamada remained children. She also completely believed Moeko's lie that Ichikawa, who appeared when the girls gathered at Yamada's house to make chocolate, was Moeko's boyfriend. While honest and without hidden agendas, she can be insensitive and inconsiderate; she fell for a scheme by a senior student aiming for the heroine, nearly cracking her friendship with the heroine, and once told Ichikawa to his face that he was "gross," showing a lack of imagination regarding others' feelings. She plays the straight man role but is often teased herself due to her airheadedness. Her family consists of her grandmother, father, mother, and two younger brothers. First person: I (Watashi). Second person for friends: Yamada, Nyaa, Moeko.

A member of Yamada's group. A girl with sanpaku eyes who is a bit quick to pick a fight. Her hobby is reading delinquent manga. She mainly plays the straight man to Yamada's airheadedness. She has a bit of a delinquent temperament and can be scary when angry, but she is a big-sister type who is kind at heart and often hangs out with Yamada and the others. She frequently provides the "tsukkomi" (straight man) commentary. Anna Yamada calls her "Nyaa." Yamada, who went to the same elementary school, calls her "Nyaa." She is loyal and deeply cares for her friends, but because of that, she often prioritizes emotions over the situation, making things worse. She has a tendency to judge and jump to conclusions based on one side of a story. When Anna Yamada was hit by a basketball, she got angry at the person's awkward smile and slammed the ball down threateningly, escalating the situation. During the villa trip, she failed to listen to Ichikawa's words and forcibly silenced him out of irritation from the heat, showing many instances of impulsive behavior.

A beautiful girl with a great physique who also works as a model. She is a celebrity at school, but contrary to her appearance, she absolutely loves to eat. She has an innocent personality and often acts before she thinks. She is happier being called "funny" than "cute." While she is approached by boys in her class and even upperclassmen, she currently has no interest in boys and mostly hangs out with girls. In other words, before becoming conscious of Ichikawa, she preferred food over romance. Despite her mature looks, her personality is quite childish; she works hard at everything but is very clumsy and disorganized, leading to many failures. She has her own sense of pride and gets frustrated when treated like a child at work. She lives with her parents in an apartment and has a dog named Wantaro. She is airheaded and has intense emotional swings. To her, being "funny" is more important than being "cute." she can't help but try to make jokes at every opportunity, but her sense of humor is unique, and her friends apparently tell her she's "boring." She isn't very good at studying, and her handwriting is far from elegant. First person: I (Watashi). When talking to family inside the apartment, she refers to herself by her own name.

The protagonist who considers himself insane. A small second-year middle school boy with a gloomy and somber impression, his right eye hidden by long bangs. He has a wide forehead. Suffering from a severe case of "chuunibyou," he is a weirdo who reads a book titled "The Encyclopedia of Murder" in class without a cover from the very first episode. He mostly inhabits the library, spending his lunch breaks engrossed in grotesque books. First person: I (Boku). When talking to people other than his family or Anna Yamada, he switches to "Ore." His grades are reasonably good. His family consists of his parents and his older sister, Kana Ichikawa, who is a college student.

A rowdy, jokester type. He often gets excited over dirty jokes with his classmates Kanzaki and Ota. He frequently teases Yamada and her friends but is completely ignored. He's a sleazy guy who casually makes sexual harassment comments in a "party boy" tone, often creeping out the girls. Even Ichikawa, before they became close, would mentally tell him to "shut up" every time he spoke out of turn.

A boy with a shaved head who looks serious at first glance, but makes more perverted comments than anyone else—a bit of a quirky character. He has feelings for his classmate, Hara-san. He is in the baseball club and often hangs out with Adachi and Ota.

A boy with a chubby build who is sometimes teased by Adachi, who rubs his chest. He is close friends with Adachi and Kanzaki and, like them, is very interested in erotic topics.

A girl with a quiet personality and a chubby build. Her classmate Kanzaki has feelings for her. While sensing the subtle relationship between Ichikawa and Yamada, she watches over them warmly. She is incredibly cute.

She went to the same elementary school as Yamada and Yoshida and was close with Yoshida. However, she currently does not look kindly on the fact that Yoshida and Yamada are close. A female classmate of Kyotaro Ichikawa and Anna Yamada. Since Yoshida now belongs to the same group as Yamada, Rin seems dissatisfied that they have grown somewhat distant. It seems they are close enough to have the occasional argument.