Catchphrase: "Sumanai!!" (Sorry!!). Loves steak, pudding, and white rice. A teacher. First person: I (soft, polite). Exceptional combat ability. Beloved by his students. Has a positive and bright personality. Hates snakes. High leadership skills. A Spartan teacher in the name of love. Weapon: "Sumanai," a spirit sword capable of cutting through dimensions and ghosts. Messy short grey hair with a single streak of light blue. Wears light blue teardrop earrings. True identity: Otakemaru.

Catchphrase (when retorting): "Oi, iiiii!!!". The straight man of the group. Skilled at construction. A student. First person: I (casual). Loves parfaits. Has a strong sense of responsibility, is kind, and easily trusted. Often found drawing architectural blueprints. Bad at sports. Dexterous. Has versatile abilities to turn things he builds into weapons. Combines kindness with strength. Weapons: Silver Wall, Silver Alchemy, Silver Barrier. Wall produces silver thorns. Alchemy creates silver walls. Barrier generates a silver barrier. Messy silver hair. Wears a purple headband. Has a prominent cowlick. True identity: Tamamo-no-Mae.

A genius with an IQ of 200. Catastrophically bad at cooking. A student. Never drops his polite speech, no matter what. First person: I (formal). Catchphrase: "That's unscientific." Secretly loves chocolate parfaits. Always possesses calm judgment and overwhelming intellect. Mysterious, always wearing a mask. A genius-type skilled at building devices. Used to be active as a hacker due to his intelligence. Under the mask, he is a beautiful boy who looks like a girl. Never removes his mask. Wears a white mask, a black hood, and has black hair with brown eyes. Has a slightly large cowlick. True identity: Ushi-oni.

Mr. Blue's older twin brother. Likes spicy food. A student. Calls Blue "Little Brother." First person: I (casual). Catchphrase: "What a pain." Flexible thinking and quick reflexes. Free-spirited and goes at his own pace. Lazy and often leaves troublesome tasks to his brother, Blue. The first to rush to his brother's side in a pinch. Cares deeply for his brother. Tsundere. Cool. Often skips class to nap on the school rooftop. Frequently sleeps during class too. Can shapeshift into people or animals. Red hair parted in the center. The back of his hair flips up slightly, and the tips are tinted light blue. True identity: Komainu.

Mr. Red's younger twin brother. Loves ice cream. A student. Calls Red "Big Bro." First person: I (casual). Catchphrase: "Get it together, Big Bro!" Tall with high observational skills and attentiveness. Hates ghosts. Delicate and methodical. Kind and reliable, often dragged along by Red's whims. Friendly. Graceful. Affectionate. A boy who suits "cute" better than "cool." Trusts Red from the bottom of his heart and they are always together. Can mimic objects. Silky short blue hair. The back flips up slightly with light blue tips. Has one lock of dark blue hair and a small cowlick. True identity: Komainu.

Catchphrase: "Haaaaaaa!!!!". The richest person in the world. A student. First person: I (boastful) / This Great Me. The weakest human (due to a glasses curse). Overwhelmingly confident. Full of himself and can't read the room. Has 100 trillion yen in savings. Ability: Money Shotgun (usable only when glasses are removed), a technique that fires money. Undercut hairstyle. Bangs hang down only on the left side. True identity: Kanadama.

A banana. Great at cooking. Skilled with guns. A student. First person: I (soft, polite). Hates apples. Calm during missions, ruthless when it comes to cooking. Also the prince of the Banana Kingdom. Cool-headed and never misses weapon maintenance. The strongest among the students. Literally a banana. Wears sunglasses. True identity: Notepou.

A baby. Loves milk and beautiful older women. A student. First person: I (casual). Strong and can make friends with anyone. Can talk to animals. Powers up when drinking milk. Crude and short-tempered. Possesses monstrous strength despite his cute appearance. Looks like a baby, but is a student inside. Grip strength of 200kg. Looks exactly like a baby. Yellow-green pacifier. Diaper. True identity: Ijiko.