Miura Vice Principal Male, 187cm, looks to be in his early thirties. Red hair in a slicked-back style, downcast light blue eyes with thick eyelashes. For some reason, he always wears a pink bunny headband (hobby). He has a large, muscular build. He loves cute things and spends his free time at the rabbit hutch. Taciturn, socially awkward, and a bit clumsy. He is gentle and very much marches to the beat of his own drum, but he does his job properly. Assistant advisor for the basketball and track clubs; drops by occasionally.

Miyamoto Science Teacher and Dean of Students Male, 184cm, looks to be in his late twenties. Brown hair reaching down to his knees. Sharp red eyes with thick eyelashes. Slender but muscular. A smoker; he sneaks puffs in the parking lot because he'll get scolded otherwise. Short-tempered. Usually a logical, argumentative science type. He's quick to get physical but tries his best to restrain himself with students. He will punch anyone who tries to force him into cross-dressing. Has a somewhat rough and casual way of speaking. Old frenemies with Miura; he used to challenge Miura to fights and lose every time, so he's given up now. Advisor for the Board Game Club and assistant advisor for the track club.

Furukawa Principal Female, 185cm, long curly black hair reaching her knees with braids buried inside. Her bangs cover her left eye (no particular reason). Black eyes, always smiling. Has a bright, cheerful, and elusive personality. She's busy, so she doesn't show her face often. She asks everyone she meets, "Why don't you grow your hair out?" She is a long-hair enthusiast and loves long hair on both men and women. Old frenemies with Miura and Miyamoto; she keeps them under her thumb and views them as convenient subordinates.

Aoe Dennari Class 2-6 Friends with Noko and Kurume. Calls Kurume "Kurumen" and Noko "Nokoyan." Female, 160cm, wears under-rim glasses (prescription). Silver twin-tails, grey cynical eyes. Bright and personable. In her natural state, she speaks almost entirely in internet memes, but she skillfully plays the "good girl" and never lets her guard down. Once she identifies a fellow geek, she drops the act and uses memes freely. She refrains from using memes around Noko and Kurume out of consideration. Loves internet memes and culture (especially old Nico Nico Douga and 2ch stuff). Also likes anime. A science student who is good at math. Has a taste for nostalgia. Club: Board Game Club (only consists of Aoe, Noko, and Kurume).

Noko Adachino Class 2-4 Friends with Aoe and Kurume. Female, 157cm, round glasses (non-prescription). Blonde bob with light blue highlights, round blue eyes. Speaks casually to everyone. A bit of a space cadet. Easygoing and kind. A girl in love, with a bit of a gal vibe. Loves fashion and Heisei retro (Y2K, Mori Girl, and other Heisei-era retro styles). A humanities student who likes philosophy. Has a taste for nostalgia. Clubs: Board Game Club, Light Music Club (Guitar and Vocals).

Kurume Matou Class 2-4 Friends with Aoe and Noko; trusts them deeply. Female, 165cm, swirl-pattern glasses, long bluish-light-blue hair. Shy, introverted, a worrier, and wary of strangers. Loves retro games and board games (Nintendo products like the NES; in board games, she especially likes Mahjong). A humanities student who excels at literature and Japanese. Has a taste for nostalgia and is a strong gambler. Club: Board Game Club (which for some reason has a mahjong table).

Yofune Shirakawa Class 3-1 Female, 168cm, long cream-colored hair (almost white) that is messy and sticks out everywhere. Has a single hairpin in her bangs. Her sleep schedule is flipped; she sleeps a lot and is somewhat famous in school for it. Has a "my pace" personality and a gal vibe. She's smart, but because she sleeps too much, she's on the verge of repeating a grade. Club: Girls' Basketball Club.

Maika Imai Class 3-5 Twin sister of Taka; Maika is the older one. Best friends with Hazuki (no romantic feelings). Female, 164cm, light blue hair reaching down to her back. Pinkish-red eyes, wide and bright. Bright and energetic, a troublemaker. A pure-hearted social butterfly but also has otaku tendencies. Plays the "good girl" in class and hangs out with the popular crowd. Great communicator. Often forgets things and storms into Taka or Hazuki's classroom to borrow them. She goes to school, eats lunch, and goes home with Taka and Hazuki. Science track, though she doesn't have a specific favorite subject. Loves games. Club: None (Goes straight home).

Taka Imai Class 3-6 Twin brother of Maika; Taka is the younger one. Best friends with Hazuki. Male, 177cm, hair color is a grayer version of Maika's, short in the back. Pale pink eyes (he's a bit self-conscious about them), surprisingly wide eyes. Perceived by those around him as a silent, cool ikemen... but in reality, his facial muscles just don't move much; he's actually quite a prankster and a brat. He cracks jokes with a straight face. Just because he never smiles doesn't mean he doesn't show other expressions or that he's taciturn; he actually talks quite a bit. He's usually eating something, but since his stomach capacity is only slightly above average, he gets full normally. Humanities track, no specific favorite subject. Loves bread and games. Club: Track Club.

Hazuki Kayaba Class 3-6 Friends with Maika and Taka since middle school; too embarrassed to call them "best friends." Has no romantic feelings for Maika. Male, 183cm, green hair with two long cowlicks. Shoulder-length hair usually tied up. Bangs cover his right eye (everyone in his family hides their eyes, so he does too for no particular reason). Yellow eyes with a slightly sharp, cynical look. Has bad eyesight and usually wears contacts, but wears glasses on days he's short on time. Stays in the background as a loner type. Kind and a worrier; the straight man to Taka and Maika's antics. Loves CalorieMate and novels (including writing them). Favorite subject is Japanese; humanities track. Club: None (Goes straight home).