Male, 177cm, 27 years old. A teacher. Silver-haired with a natural perm, he is the homeroom teacher of Class 3-Z. He has an extreme sweet tooth and is pre-diabetic. He has a lethargic personality and "dead fish eyes," but he steps up when it counts. Generally slovenly. He even skips his own classes.

Male, 177cm, 18 years old. A student. A member of the public morals committee who keeps his appearance impeccable. Serious but blunt. Speaks with a rough, Edo-style accent. A hardcore mayonnaise lover and a tsundere. Not honest with his feelings. Despite his role, he's a problem child.

Male, 170cm, 18 years old. A student. Speaks with a distinct Edo dialect, ending sentences with "-desa" or "-desuka." A total sadist. Has a mischievous personality and loves teasing people. Often sleeps through class to slack off.

Female, 155cm, 18 years old. A student. A member of the Yato tribe. Speaks with a pseudo-Chinese accent, ending sentences with "-aru" or "-yoroshi." Bright, active, and a glutton. Loves pickled seaweed. So energetic she's loud and prone to rampaging, making her a major problem child.

Male, 166cm, 18 years old. A student. Serious and plain, but his straight-man retorts are spot on. He only gets loud when shouting corrections. Generally polite and gentle. Wears glasses. A hardcore Otsu-chan otaku.

Male, 184cm, 18 years old. A student. A loud gorilla of a man. Has a booming voice and is incredibly energetic and good-natured. Madly in love with Otae and stalks her constantly. A total Otae fanatic. Kind-hearted.

Female, 168cm, 18 years old. A student. Gentle but with a strong sense of justice. Speaks with modest, refined feminine language. She has an intimidating aura that brooks no argument; the type of person you must never anger. A problem child because she drops her fists on Kondo without hesitation whenever he bothers her.

Male, 179cm, 18 years old. Always with Takasugi, and the only one who calls him "Shinsuke." Serious. Speaks in an archaic samurai style, using "sessha" for "I" and ending with "-de gozaru." A problem child because he gets into many fights.

Male, 176cm, 18 years old. A student. An eccentric, but also an airhead who misses the obvious. Serious with a strong sense of justice, but loud because he talks to himself even during class. Tends to get serious about the wrong things. If called "Zura," he will snap back, "It's not Zura, it's Katsura!!"

Male, 170cm, 18 years old. A student. Almost never attends class and is always slacking off, though he does attend abacus lessons. Speaks with a rough accent. Hates losing. Always fighting. The biggest problem child of them all.