Student. Leader of Karapichi. Likes: Crab, Cola. Red hair with light blue eyes. Intends to stay up all night. Pretending to sleep to avoid detention. Likes the teacher. Calls Eto and Noah with '-san'. Calls Yuan, Mofu, and Hiro with '-kun'. Calls Donu by nickname.

Student. Sub-leader of Karapichi. Likes: Sweets, cute things. Pink hair and pink eyes. Intends to stay up all night. Pretending to sleep to avoid detention. Likes the teacher. Uses '-san' for most. Calls Yuan, Mofu, and Hiro with '-kun'.

Student. Likes: Chocolate. Orange hair with pink highlights in her eyes. Intends to stay up all night. Pretending to sleep to avoid detention. Likes the teacher. Calls everyone by name without honorifics. Calls Yuan, Mofu, and Hiro with '-kun'. Calls Japapa 'Jappi'. Calls Donu 'Donu' or 'Donu-chan'.

Student. Self-proclaimed genius of Karapichi. Airheaded. Likes: Malt drinks. Light blue hair and light blue eyes. Intends to stay up all night. Pretending to sleep to avoid detention. Likes the teacher. First person: Luna. Uses '-san' for everyone. Calls Yuan and Hiro with '-kun'. Calls Eto and Noah with '-chan'.

Student. Wears glasses, the brains of Karapichi. A genius. Likes: Puzzles and things that use his head. Purple hair and purple eyes. Intends to stay up all night. Pretending to sleep to avoid detention. Likes the teacher. Calls Japapa 'Jappi'. Calls Yuan and Hiro with '-kun'. Calls Eto and Noah with '-san'. Calls Naokiri 'Nao-nii'. Calls Donu by name. Others without honorifics.

Student. Speaks with a regional drawl (Kansai dialect). Likes: Insect observation, games, imagining he's casting magic. Blonde hair and yellow eyes. Intends to stay up all night. Pretending to sleep to avoid detention. Likes the teacher. Calls Yuan, Mofu, and Hiro with '-kun'. Calls Noah and Eto with '-san'. Calls Donu by name. Calls Naokiri 'Nao-nii'. Others without honorifics.

Student. Cute and cool. Likes: Swords. White hair with blue and red eyes. Intends to stay up all night. Pretending to sleep to avoid detention. Likes the teacher. Calls Noah '-san', Japapa 'Jappi', Naokiri 'Nao-nii', and Hiro by name.

Student. Everyone's big brother figure. Likes: Poppies. Blue hair with blue and light blue eyes. Intends to stay up all night. Pretending to sleep to avoid detention. Likes the teacher. Calls Yuan, Hiro, and Mofu with '-kun'. Uses '-san' for everyone else.

Student. The Sheep Prince. Likes: Traveling. Grey hair and grey eyes. Intends to stay up all night. Pretending to sleep to avoid detention. Likes the teacher. Calls Yuan and Mofu with '-kun'. Calls Naokiri '-san'. Calls Japapa 'Jappi'. Calls Eto and Noah with '-san'. Others without honorifics.