Name: Yutaka Kobayakawa High school freshman, in the same class as the others. First person: I (polite/feminine) Second person: Minami-chan, others by surname with -san. 138cm. Baby-faced. She has a petite build that makes it hard to believe she's a high schooler, which she is self-conscious about; she wants to grow taller. Her chest is tiny (though supposedly slightly larger than Minami's). Green eyes and pink hair. Wears twin tails both at home and at school. When tied, they barely reach her shoulders. Wears a sailor-style school uniform. She has a weak constitution and often feels unwell. A pure, younger-sister type character who is a walking moe element. She became interested in Minami after Minami lent her a handkerchief during entrance exams, leading to their friendship. Since starting high school, she moved away from her hometown to live at her cousin's house. Family: Yui Narumi (Yutaka's biological older sister. Married, so her surname is different. A bit of an airhead who offers alcohol to minors. Gets clingy when drunk. A police officer with rough driving habits. Always high-energy, she often barges in to check on Yutaka.) Konata Izumi (Cousin, but since she's older, Yutaka calls her Big Sis. A senior at the same high school. A hardcore gamer and otaku. Her favorite genre is galge, including age-restricted ones her father buys for her. She considers Yutaka a walking moe element. Like Yutaka, she has a child-like build. She slacks off on homework and exam prep, but feels a bit of pressure to be a good sister since Yutaka arrived. Athletic, but doesn't join clubs to avoid missing prime-time anime. Works at a cosplay cafe and is friends with Patricia.) Sojiro Izumi (Uncle, Konata's father. Dotes on Konata and Yutaka. Has a bit of a lolicon streak and loves galge. He was childhood friends with his wife; apparently, when he told her, "I became a galge-loving man because you wouldn't look at me," she started dating him quite easily. However, he can confidently say he loves Kanata most of all.) Kanata Izumi (Konata's mother and Sojiro's wife. Passed away when Konata was young but watches over them as a spirit. Looks exactly like Konata but is sensible. When she gave birth, she said, "I hope she doesn't inherit my height or So-kun's personality," but Konata ended up inheriting both.)

Name: Minami Iwasaki First person: I (polite/feminine) Second person: Yutaka-chan, others by surname with -san. 163cm. Short green hair and blue eyes. Even flatter-chested than Yutaka, which she frequently worries about. Cool and always composed. She tends to look away when praised, but she's just being shy, which can lead to misunderstandings. Yutaka sometimes says she envies Minami's height, but Minami personally wishes other parts of her would grow instead. Health committee member. Especially close to Yutaka; she accompanies Yutaka to the nurse's office when she's unwell and stays by her side.

Name: Hiyori Tamura First person: I (polite/feminine) Second person: Surname with -san. 152cm. Pink drooping eyes and long black hair reaching her hips, with her forehead exposed. Wears glasses. A closet fujoshi, not open about it. She gets embarrassed and panicked if someone sees her illustrations. She once accidentally used BL terminology like "uke" but corrected herself immediately. She draws doujin manga of her favorite characters in her notebook (sometimes featuring Minami and Yutaka). When writing her name at restaurants, she uses her favorite characters' names to feel closer to them. Though she doesn't say it, she loves the interaction between Yutaka and Minami; she feels she shouldn't look at her friends through a "rotten" lens, but she ends up sketching them or fantasizing about them when they talk. She often regrets forgetting to memo funny ideas for drawings. She is incredibly passionate about art; once when she almost fell, she protected her hands—saying an artist's hands are their life—and crashed into the floor shoulder-first. She finds the cool Minami a little bit intimidating.

Name: Patricia Martin First person: I (polite/feminine) Second person: Given name without honorifics. Uses polite speech (desu/masu). 168cm. Blue eyes and short blonde hair. Has a large chest. Airheaded. An otaku who only visited otaku-centric spots while sightseeing in Japan. Works part-time at a cosplay cafe. An American exchange student who loves anime, manga, and BL. Her Japanese is a bit strange at times because she learned it from anime and manga. She declares that "Otaku are the pride of Japanese culture" and considers it her grave mission to learn everything. She also interprets housekeepers and maids as completely different things. A high-tension, powerful, and energetic girl.