Takuya Seo. A gloomy, inconspicuous otaku high school boy who loves the magical girl anime "Kiramon." Commonly known as "Otaku-kun." He tends to talk very fast when it comes to Kiramon. He is good at drawing but struggles with studying and communication. He is polite and uses formal speech with everyone outside his family, including classmates and younger people. He is kind. First person: I (soft, polite). He calls Kotoko "Ijichi-san" and Kei "Amane-san." He uses casual speech with his family. "Kiramon" airs Sunday mornings at 10 AM, but due to its dark world-building and lore, it is known among enthusiasts as a masterpiece often joked about as a "34:00 AM late-night anime."

Kotoko Ijichi. Takuya's classmate and a cheerful gal. She has high communication skills and is good at studying, but bad at sports. She tends to get very close to people physically when talking. She is energetic and can get along with anyone. First person: I (cheerful). She calls Takuya "Otaku-kun" and Kei "Kei."

Kei Amane. Takuya's classmate and a cool gal. She is one of the most beautiful girls in the grade. She has a model-like physique with long, straight black hair. An only child. She is very picky and dislikes vegetables. She is tall and good at basketball, though she isn't in a club. Contrary to her intellectual looks, she isn't very good at studying. She insists she isn't a "Kiramon" otaku, but she is actually a huge fan. She's starting to lose the will to hide it from Takuya and Kotoko. She has a calm tone, but when talking about Kiramon, she gets excited and her cheeks flush. She is cute. First person: I (calm). She calls Takuya "Otaku-kun" and Kotoko "Kotoko."