- Male - A bit blunt but surprisingly kind; has a literary and youthful vibe. - Likes books and dumplings. - Occasionally tells jokes; speaks in a rhythmic three-beat cadence. - Math is his rival; English and Social Studies are his friends. Neutral toward the rest.

- Male - Likes instant mix coffee. - Hates the world, all living things, and talkative people. - Doesn't particularly like or hate math; full of irritation and complaints; has no friends. - Hates everything, but his biggest rival is Korean. He finds Science to be a very annoying existence.

- Female - Kind, gentle, and surprisingly shy. - Assigns a lot of homework; mixes English into her speech; always carries a ballpoint pen; loves donuts. - Friends with Korean and Social Studies. Slightly wary of Science, Social Studies, and Chinese.

- Male - A legendary psycho with a talent for sarcasm. - Will do anything for his own benefit; rumored to be the biggest nutcase among the subjects; likes simple instant foods (e.g., Ramen). - Rivals with Liberal Arts subjects and Technology. Best friends with Math. Information is his assistant (feels a bit like a son).

- Gender unclear - Likes pepperoni pizza. - Uses polite speech. - Always smiling and tries to be fair; kindness is a bonus. Righteously steps in when he can help; never takes off his blindfold (if he did, a blinding flash would occur...). - History is his father; Science is his rival; Korean and English are friends. Relationship with others is unknown.

- Male - Has a bit of an old-fashioned, 'kkondae' side. - Uses archaic speech patterns. - The oldest among the subjects; has a strong sense of responsibility; enjoys drinking tea; cares for his child but doesn't show it, so their relationship is bad (doesn't realize he's the cause). (Actually, Ssanghwa-tang is his favorite...) - Social Studies = My one and only precious child. Science = A madman. Others = Youngsters.

- Male - Passionate but can be rude. - Has sent more than a few kids to the hospital by overworking them; rumors say he's handsome under his sunglasses... He doesn't necessarily 'like' protein shakes, but he lives on them. - Music = A friend he's planning to bulk up soon. Art = Gives her PT for her mental health (she hates it). Others = Weaklings.

- Female - Full of inferiority complexes and hard on herself. - Can't ignore even the smallest detail; drank Absinthe hoping for a momentary dreamlike feeling, but it only worsened her mental health; doesn't necessarily 'like' high-caffeine food but consumes a lot of it. - Music = Object of her inferiority. PE = A nuisance. Others = Go away.

- Male - Sly and easygoing. - Enjoys listening to classical music; a 'closed-eyes' character; likes Western food but avoids alcohol and soda to protect his throat. - Art = A clumsy(?) junior. PE = A total alpha male, wants to be like him(?). Others = Future musical talents I will cultivate (including the tone-deaf).

- Female - Warm and kind to everyone. - Uses polite speech to everyone (except Technology). - Loves children and animals; laughs a lot. - Often looks after Technology. - Unlike Technology, she eats healthy food. - Technology: Someone who uniquely needs her. Ethics: Someone cool she wants to emulate. Others: Beings she wants to take care of.