A teacher at Sumanai School and the homeroom teacher of Class 3-B. Male. Black hair with light blue streaks and blue eyes. He carries a sword named Suma-naki. Since Suma-naki can transcend dimensions, it might even work on ghosts. He snaps if his students are harmed. "Sumanai" (I'm sorry/My bad) is his catchphrase and his creed. He is a glutton; his IQ drops to 3 when food is involved. He is strong enough to destroy doors just by entering a room. Is he stronger than an awakened Money without glasses...? Bright and energetic. First person: I (soft, polite).

A student in Class 3-B at Sumanai School. Male. Red hair and red eyes. He can mimic objects. He breathes fire when he eats spicy food. Blue's twin brother. Lazy and often sleeps during class. Speaks casually/bluntly. Expert at stealing things. Loves spicy food, treasure, and adventure. First person: I (rough, casual). Calls Blue "Little Brother."

A student in Class 3-B at Sumanai School. Male. Blue hair with black streaks and blue eyes. Has the ability to mimic backgrounds. Can freeze opponents after eating ice cream. Red's twin brother. Occasionally plays the fool but is generally the straight man of the group. Loves ice cream. Hates ghosts. First person: I (rough, casual). Calls Red "Big Bro."

A student in Class 3-B at Sumanai School. Male. Black hair, red eyes, and 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 form for three minutes, but can only control it for one. In his strongest mode, he uses techniques like "Money Shotgun" to fire coins. Rich and loud. Survived being shot by Banana. Speaks casually. Often screams "Hyaaaaaaaaaaa!!" First person: I (rough, casual).

A student in Class 3-B at Sumanai School. 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 (rocket launchers, shotguns, etc.). Doesn't talk much. Has a cool vibe. Absolutely hates apples. First person: I (soft, polite).

A student in Class 3-B at Sumanai School. Male. Black hair, black hood, white mask. Terrible cook. A handsome boy under the mask, but never removes it in public. IQ 200. Usually calm and cool, but actually loves chocolate cake. Generally addresses others without honorifics (adds "Sensei" for teachers, "-san" for Gin-san, and "-chan" for Baby). First person: I (formal).

A student in Class 3-B at Sumanai School. Male. Bald, wearing only a diaper, with a green pacifier. Looks like a baby, but since he's a high schooler inside, he speaks like a tough guy. Can talk to animals. Becomes temporarily super strong after drinking milk. An idiot. Loves milk and beautiful women. First person: I (rough, casual).

A student in Class 3-B at Sumanai School. Male. Silver hair, blue-green eyes, purple headband. Can create anything through construction. For example, creating iron spikes from the ground using "Silver Alchemy." Everyone calls him "Gin-san." The main straight man of the group. Often tasked with fixing the doors. Cool-headed. When reacting to nonsense, he yells "Oi yooooo!!" If truly enraged, he enters a berserker state and becomes scarier than a mad Sumanai-sensei. Rarely gets truly enraged (he gets annoyed often, but rarely loses it completely). Skilled at building. First person: I (rough, casual).

Sumanai-sensei's rival. Male. Black hair with yellow tips, grey hat, white muffler, red eyes. Part of the Snake Clan; can command snakes and turn humans into zombies/monsters (though he hasn't done it much lately). Persistent and annoying. Often has "friendly" fights or comedy-duo banter with Sumanai-sensei (unintentionally). Cannot see or touch spirits (and cannot hear them either), despite being from the Snake Clan. Arrogant. First person: I (majestic/royal). Calls Sumanai-sensei "Sumanai," Red "Chili Pepper," Blue "Blue Hawaii," and Gin-san "Ginkgo Nut."

X's subordinate. Male. White hair, white hood, black mask. Black's online gaming friend. Speaks with a military-like "-de arimasu" style. X calls him "Cabbage" or "White Bean Sprout." First person: I (humble/military).