Miura Vice Principal Male, 187cm, looks to be in his early thirties. Red hair in a slicked-back style, light blue eyes with a downward cast, long eyelashes. For some reason, he always wears a pink rabbit headband (hobby). Large, muscular build. Loves cute things and spends his free time at the rabbit hutch. Taciturn, soft-spoken, and somewhat clumsy. Calm and very much marches to the beat of his own drum, but does his job properly. Assistant advisor for the basketball and track clubs; shows his face occasionally.

Miyamoto Science Teacher and Head of Student Discipline Male, 184cm, looks to be in his late twenties. Brown hair reaching down to his knees, red upturned eyes, long eyelashes. Slender but muscular. A smoker; he sneaks puffs in the parking lot because he'll get scolded otherwise. Short-tempered. Usually a logical and pedantic science type. Quick to get physical but tries his best to hold back with students. Responds with a punch if forced to cross-dress. Has a somewhat rough and blunt way of speaking. Old friends/rivals 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. Black hair reaching her knees with messy curls and hidden braids. Her left eye is covered by her bangs (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, "Want to grow your hair out?" She is a long-hair fanatic and loves long hair on anyone regardless of gender. Old friends 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 slip. If she finds a kindred spirit, she uses memes without restraint. She refrains from using internet 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 excels at math. Has nostalgic tastes. Club: Board Game Club (only Aoe, Noko, and Kurume are members).

Noko Adachino Class 2-4 Friends with Aoe and Kurume. Female, 157cm. Wears round glasses (fashion). Blonde bob with light blue highlights, round blue eyes. Speaks informally 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-era retro styles (Y2K, Mori Girl, etc.). A humanities student who likes philosophy. Has nostalgic tastes. Clubs: Board Game Club, Light Music Club (Guitar and Vocals).

Kurume Matou Class 2-4 Friends with Aoe and Noko; she feels comfortable around them. Female, 165cm. Wears thick "swirl" glasses. Long hair in a bluish-light-blue shade. Shy, introverted, a worrier, and timid around strangers. Loves retro games and board games (NES and other Nintendo products; especially fond of Mahjong). A humanities student who excels at literature and Japanese. Has nostalgic tastes and is strong at gambling. Club: Board Game Club (which for some reason has a mahjong table).

Yofune Shirakawa Class 3-1 Female, 168cm. Cream-colored hair leaning toward white, long and very frizzy/bouncy. Has a single hairpin in her bangs. Her sleep schedule is flipped; she's often sleeping and is somewhat famous in school for oversleeping. Easygoing personality, a gal. She's smart, but she sleeps so much she's on the verge of repeating a grade. Club: Girls' Basketball Club.

Maika Imai Class 3-5 Twins with Taka; Maika is the older sister. Best friends with Hazuki (no romantic feelings). Female, 164cm. Light blue hair reaching her back, pinkish-red eyes, wide-eyed look. 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. Socially adept. Often forgets things and storms into Taka or Hazuki's classroom to borrow them. Goes to school, eats lunch, and goes home with Taka and Hazuki. Science track, but has no particular favorite subject. Loves games. Club: Go-home Club.

Taka Imai Class 3-6 Twins with Maika; Taka is the younger brother. Best friends with Hazuki. Male, 177cm. Hair color is a bit more grayish than Maika's, short in the back. Pale pink eyes (a bit of a complex), surprisingly wide eyes. Perceived by those around him as a silent, cool, handsome guy... but in reality, his facial muscles just don't move much; he's actually quite playful and a bit of a brat. He plays pranks with a straight face. He never smiles, but he does show other expressions. He's not taciturn; he actually talks quite a bit. Always eating something, but his stomach capacity is only slightly above average, so he gets full normally. Humanities track, no particular favorite subject. Loves bread and games. Club: Track Club.

Hazuki Kayaba Class 3-6 Friends since middle school with Maika and Taka; too embarrassed to call them "best friends." No romantic feelings for Maika. Male, 183cm. Green hair with two long cowlicks. Shoulder-length hair usually tied up. His right eye is covered by his bangs (his whole family does the "covered eye" look, so he does too for no real reason). Yellow eyes with a slightly sharp, cynical look. Has poor 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: Go-home Club.