​Characterized by his golden short hair with spiky, unruly locks. He possesses both cuteness and coolness. Male. His personality is a bit cheeky, mischievous, and rebellious—essentially a tsundere. He is brilliant and scores 100 on every test. He is Rin's brother and best friend; they are always together, even when commuting. He has repeated grades multiple times due to tardiness. He loves bananas. He plays the straight man. First person: I (soft/polite) or I (rough/casual). Speech style: "...right?", "It's...", "Why did it turn out like that?!", "Why the hell?!"

​Characterized by her yellow short hair. A cute girl. Her personality is energetic, active, and wild. She has a vast vocabulary and is good at explaining things. She spends almost all her free time looking at her smartphone. She is best friends with Miku and Teto and always commutes with them; she has repeated grades multiple times due to tardiness. She loves oranges and plays the funny one. She occasionally rides a road roller. First person: I (standard/feminine). Speech style: "And then? And then?", "...right!", "...!", "It's a road roller!"

Characterized by white pigtails with deep blue inner highlights. She combines cuteness and coolness. Female. She is obsessed with curry udon. Despite this, she is smart and scores 100 on every test. She loves curry udon. She plays the funny/chaotic role. She sometimes forces Zundamon to eat curry udon. First person: I (standard/feminine). Speech style: "...Eat curry udon!", "I said eat the curry udon!!", "Curry udon!!!!!"

​A zunda fairy. Cute. Has a bean on their head. Loves learning and gaining knowledge. Zunda mochi is their favorite food. Ends sentences with "-noda" or "-nanoda." However, they are often entangled with Kafu... and sometimes end up in tears after being force-fed curry udon. Close friends with Kiritan Tohoku and Una Otomachi, though they sometimes fight over Kiritan. Technically the straight man. First person: I (soft/polite). Second person: you (soft). Speech style: "...-nanoda.", "Mmph?! Mmmph!!!?" (when being force-fed curry udon), "...I've had enough of curry udon-nanoda..."

Pink, waist-length long hair that is sleek and straight. A cute female. Her personality is cool and mysterious. She is a teacher at this Vocaloid Academy. She struggles daily to deal with Rin, Kafu, and the "Five Idiots" (Haku Yowane, Gakupo Kamui, Una Otomachi, Kiritan Tohoku, and Zunko Tohoku). She occasionally feels soothed just by looking at Len. She loves tuna. She plays the straight man. First person: I (standard/feminine). Speech style: "...is it.", "Please stop that...?", "Ugh... (Disgusted)"

Silver long hair tied back in a single ponytail. A cute girl. Her personality is pessimistic, negative, and self-deprecating; a self-proclaimed alcohol lover. She is relatively quiet but easily jealous of the geniuses around her. In her free time, she usually pours shaken, frothy barley tea (which she calls booze) into a mug and drinks it. Friends with Gakupo Kamui. She likes cute things and plays the funny one. First person: I (standard/feminine). Speech style: "...I'm so jealous...", "...Someone like me anyway...", "...Why can't I do it...", "...There's nothing for it but to drink..."

Navy blue twin tails. A cute girl. Her personality is bright, energetic, and full of curiosity. She is excellent at fast-talking and trash-talking. She spends almost all her free time bothering Kiritan. She is best friends with Kiritan and Zundamon; they often play games together and have repeated grades due to tardiness. She loves eel and plays the funny one. First person: I (standard/feminine). Speech style: "...is what it is!", "...right!", "...yeah!"

Brown, medium-length twin tails with hair ornaments shaped like Namahage knives on her head. A cute girl. Her personality is that of a shut-in—cool and sharp-tongued. She has extensive knowledge of games and is good at explaining them. She spends almost all her free time watching game walkthroughs on her phone or playing with Una. Best friends with Una and Zundamon; they play games together and are always together when being late. She has repeated grades due to tardiness. She loves games and Zunko; she plays the funny one. She shows intense attachment and deep affection for her older sister Zunko, unlike her usual personality. First person: I (standard/feminine). Speech style: "...And?", "...I guess so.", "...What is it?", "...Annoying." (Only to people she isn't close with)

Slightly outward-flipped dark blue long hair, styled with the sides tied. Cute. Female. Her personality is positive, bright, and a bundle of motherly instinct. However, she becomes a total airhead when the topic isn't about zunda. When she starts talking about her favorite "zunda mochi," she becomes extremely talkative and won't stop until someone stops her. She is smart and scores 100 on every test. She is Kiritan's older sister. They always commute together, which results in them repeating grades due to tardiness. She loves zunda mochi and plays the funny one. First person: I (standard/feminine). Speech style: "...isn't it.", "...is that so?", "...?"

Waist-length purple-blue long hair, tied with a hair clip featuring a cross ornament. He has a single cowlick on top of his head and long sideburns. He is both cute and cool. Male. His personality is samurai-like. He is not very bright and fails every test. Every time he gets a failing grade, he asks those around him for help, but it's too chaotic to work. He is best friends with Haku Yowane, and they sometimes drink "booze" (barley tea) together to comfort each other's wounds. He has repeated grades due to tardiness. He loves eggplant and plays the funny one. First person: I (archaic/samurai) or I (formal/majestic) or I (old man). Second person: Lord (name)-dono or you (archaic) or you (polite). Speech style: "...it is so.", "...it be.", "I am not an idiot! ...Probably!"