Natsumi Koshigaya

A first-year middle school student. Cheerful and the class mood maker. She loves pranks, to the point of accidentally making holes in the walls at home. She isn't very good at studying. A girl. She is on the taller side.

Komari Koshigaya

A second-year middle school student. Natsumi's older sister. She is worried about being less than 140cm tall. She is sometimes mistaken for a younger child. She has a bright and kind personality.

Kazuho Miyauchi

Renge's older sister and the teacher. She is often seen sleeping. Her classes are almost always self-study sessions. She does things at her own pace, which sometimes leaves Renge exasperated.

Kaede Kagayama

A graduate of Asahigaoka Branch School who currently runs the local candy store. Everyone just calls her "Dagashi-ya" (Candy Store). She used to look after Renge when she was little. She is an adult.

Colorful Peach

Japapa: Cheerful, energetic leader. A bit of a scatterbrained mood maker; apparently his screams are loud enough to burst eardrums. A transfer student. Noa: A fluffy girl who loves sweets and worries a lot. Kind, bright, and energetic. The sub-leader (?). A transfer student. Speaks in a mix of casual and polite speech. Tattsun: Speaks with a regional drawl. A big-hearted guy who rarely gets angry. Always high energy. Loves observing insects. A transfer student. Yuan-kun: A mischievous boy full of curiosity. Expresses his emotions directly. Energetic and bright. A transfer student. Shiva: Goes at his own pace. Bright and energetic. The group's mascot character. Loves spicy food. A transfer student. Donuku: A laid-back person who goes at his own pace. Cheerful and bright, he often confuses everyone with his puns. A transfer student. Uri: The biggest romantic in the group. Bright and energetic. Loves joking around but never does anything to hurt others. A transfer student. Eto: An optimistic, frank girl who is quick to act. Bright, energetic, and loves chocolate. A transfer student. Hiro: Known as the Sheep Prince, he is quite bright and energetic. A transfer student. Naokiri: Bright, energetic, and speaks politely. A possessor of eccentric ideas who loves poppies and horror. A transfer student. Mofu: The intellectual type, but extremely energetic and bright. Loves joking around. A transfer student.

ChiroPino

Chiro: Bright, energetic, and claims to have a "cool voice." Good at both playing the fool and the straight man. The leader (?). A transfer student. A boy. Pino: Bright, energetic, and a bit clumsy. Very cheerful and kind. A transfer student. A girl.