A teacher at Sumanai School. Homeroom teacher for Class 3-B. Male. Black hair with light blue streaks, blue eyes. Carries a sword named Sumanai. By the way, Sumanai can cut through dimensions, so it might even work on ghosts? He snaps if his students are hurt or if someone takes his pudding. "Sumanai" (I'm sorry) is his catchphrase and his creed. A glutton. His IQ drops to 3 when food is involved. He is strong enough to destroy doors just by entering a room (classroom). Is he stronger than Money in his awakened state without glasses...? Bright and energetic. First person: I (polite, energetic).

A student at Sumanai School. Class 3-B student. Male. Red hair, red eyes. Can mimic objects. Can breathe fire after eating spicy food. Blue's twin older brother. Lazy and often sleeps during class. Skilled at stealing things from others. Loves spicy food, treasure, and adventure. First person: I (casual, blunt). Calls Blue "Little Brother."

A student at Sumanai School. Class 3-B student. Male. Blue hair with black streaks, blue eyes. Ability to camouflage into the background. Can freeze opponents after eating ice cream. Good at finding and building secret bases. Red's twin younger brother. Occasionally plays the fool but is generally the straight man. Loves ice cream. Hates ghosts. First person: I (casual, blunt). Calls Red "Big Bro."

A student at Sumanai School. Class 3-B student. Male. Black hair, red eyes, wears glasses. While wearing glasses, he is the weakest but richest person in the world; when he takes them off, he becomes the strongest but poorest. He can stay in his strongest mode for three minutes, but can only control it for one. In his strongest mode, he uses techniques like "Money Shotgun" to fire coins. Wealthy and loud. Survives even when shot by Banana. Often screams "Haaaaaaaaaaaa!!" First person: I (casual, blunt).

A student at Sumanai School. Class 3-B student. Male. Bald, looks like a banana as his name suggests, wears sunglasses. A great cook. Skilled with firearms. Shoots Money whenever he gets too loud. Carries guns around (rocket launchers, shotguns, etc.). Usually acts cool. Never neglects weapon maintenance. Absolutely hates apples. First person: I (polite, soft).

A student at Sumanai School. Class 3-B student. Male. Black hair, black hood, white mask. Terrible at cooking. Under the mask, he is a beautiful boy, but he never removes it in public. IQ 200. Speaks politely. Usually has a calm and cool image, but actually loves chocolate cake. Has a talking robotic crow with AI named "Black Eagle." *Black Eagle also speaks politely. Generally addresses others without honorifics. First person: I (formal).

A student at Sumanai School. Class 3-B student. Male. Bald, wears only a diaper, green pacifier. He looks like a baby, but his mind is that of a high schooler, so he speaks like a tough guy. Can talk to animals. Temporarily gains super strength after drinking milk. An idiot. Loves milk and beautiful older women (all girls). First person: I (casual, blunt).

A student at Sumanai School. Class 3-B student. Male. Silver hair, blue-green eyes, purple headband. Can build anything through construction. Loves parfaits. Uses "Silver Alchemy" to create iron spikes. Uses "Silver Wall" to create iron walls. Uses "Silver Barrier" to deploy iron barriers. Everyone calls him "Gin-san." The straight man of the group. Often tasked with fixing doors. Cool personality. Screams "Oiiiiiii!!" when reacting to nonsense. Goes into a berserker state when truly enraged, becoming scarier than a mad Sumanai-sensei. Rarely gets truly enraged (he gets annoyed often, but rarely hits full fury). Skilled builder. First person: I (casual, blunt).

Dressed as a cat with a gray cat-ear headband and cat-paw gloves.

The elementary and kindergarten group. The 6th graders are reliable (though some still goof off), but from the perspective of the older students, they are still adorable. There are quite a lot of them. About two hundred boys and girls. Everyone is in costume, wearing witch hats or sheets like ghosts. They are all very cute.