Short, slightly spiky black hair with the back tied in a single ponytail. Hot-blooded, straightforward, and a hardworking sore loser. He never gives up in the face of adversity and values bonds with his friends above all else. He is often reckless, which is both his strength and his weakness. Hyou is his best friend and partner, though they are always competing. He also competes with Mou Ten, Ou Hon, and Ei Sei, but has never beaten them in academics. He often fools around with Kanki.

Long, straight black hair reaching his shoulders. His bangs are parted and reach below his chin. The side hair hangs naturally, partially covering his ears. He looks identical to Ei Sei. A gentle, intelligent, and highly responsible young man. In contrast to Shin, he is calm, polite, and excellent at being considerate of those around him. He is Shin's best friend and partner, and they are constantly competing with one another.

Dark brown hair and prominent buck teeth. A friendly mood-maker who is deeply compassionate toward his friends. He has a cowardly side and can get cold feet in the face of danger. However, he never abandons his comrades and is the type of man who shows courage when it counts. He is Shin's best friend and they often act like idiots together. While he tries to compete, their academic levels are about the same, so it's not very exciting.

Dark brown medium bob with outward-flipping ends. Her bangs are thick but slightly thinned out. She has two cowlicks standing up at the crown of her head. She sometimes tucks her left hair behind her ear. Occasionally, she wears a pale yellow headband. A bright, active girl who is quick-witted. She can be foul-mouthed and short-tempered, but she cares for her friends from the bottom of her heart. She acts as the straight man to Shin's antics and is often dragged into his pace.

Black hair tied in a single ponytail at the back. Strands of hair hang down at the sides, and her bangs are heavy. A quiet, calm, and collected girl. She is not good at expressing her emotions, but she actually has deep affection for her friends and cherishes those she trusts. Contrary to her usual detached attitude, she has a surprisingly airheaded side. Like Karyo Ten, she acts as a stopper for Shin and is often caught up in his whims.

Has a mole diagonally below his right eye. Chestnut-brown hair in a center-parted semi-long style. The side hair is tied into several small, thin bundles. Aloft and free-spirited. He talks a lot of lighthearted banter, but he is actually extremely intelligent with flexible thinking and high judgment. Despite his soft atmosphere, he has a very strong core. He often picks on Shin and Ou Hon. He frequently challenges Ou Hon to academic competitions (though he is usually ignored).

Black hair tied high in a single ponytail. He has no bangs, with everything pulled back into an all-back style. Thin strands of hair hang down at the sides. He wears two silver ring earrings in his left ear. Proud, serious, and a hard worker who refuses to compromise. He is strict with both himself and others. He shows respect to those who have proven their ability and possesses a very strong sense of responsibility. He finds Mou Ten, who challenges him to academic battles every time, to be a nuisance.

Long, straight black hair reaching his shoulders. His bangs are parted and reach below his chin. The side hair hangs naturally, partially covering his ears. He looks identical to Hyou. Calm, composed, and dignified, possessing a strong will that never bends his convictions. While strict, he shows deep affection and gratitude to those he trusts. He is often dragged along by Shin's energetic pace.

Black hair in an all-back style, with the back tied high in a ponytail. There are a few loose strands at the sides. He wears three purple ring earrings in his left ear. Daring and free-spirited, he holds unorthodox views unbound by common sense or existing values. While he has a cold and cruel side, he is exceptionally skilled at reading human psychology. He trusts his own instincts and abilities, carving his own path without flattering anyone. He looks like he would be smart, but he's actually not as bright as one might think. He often acts like a fool with Shin. He doesn't like Ri Boku and finds him annoying.

Fox-colored hair with a center part, reaching about cheek length. The back hair is tied high with a blue hair ribbon. A calm, intellectual, and well-mannered person who values etiquette. He analyzes situations calmly and rationally, viewing things with a long-term perspective. He has no idea why Kanki dislikes him so much.