Gender: Neutral Personality: Rude and playful. Height: 150cm

• The shortest among all the subjects.

L: Math, himself (lol), xy (pet dog)

H: Korean, Korean (the subject), writing

• Wears a navy hoodie and jeans. Wears a monocle. Left eye is yellow with a ÷ pupil, right eye is blue with a × pupil. Earrings are a minus (-) shape on the left and a plus (+) shape on the right.

• Fights often with Korean. Usually, Arithmetic starts the trouble (or gets caught playing pranks). -> Calls Korean a "keyboard warrior" or a "spellchecker." -> They fight because they're close, anyway.

• Close with Science.

• Has a pet dog named xy. It's a small dog.

• His room is littered with broken calendars (torn, soaked in water...). -> You almost feel sorry for the calendars.

• The tip of his tail is shaped like an equals sign (=).

Gender: Neutral Personality: Polite and upright. Height: 157cm

L: Korean (the subject, not himself), writing

H: Arithmetic, calculation

• Wears a brown coat, white shirt, and jeans. Eyes are ochre-colored, and he wears a crimson bowtie. Earrings are a 'ㄴ' shape on the left and a 'ㅎ' shape on the right.

• Fights often with Arithmetic. -> Half because they're close, half because they're incompatible.

• The tip of his tail is shaped like a pencil, which he can use to write. -> He usually uses his hands, but says he uses his tail when he's feeling lazy.

The Nagger

Gender: Neutral Personality: Diligent but jaded by society. Height: 170cm

L: Rest, money

H: Work, going outside, losing out on things, society (the only one who hates their own subject).

• Wears a white T-shirt and black jeans. Eyes are white. Has dark circles. Earrings are shaped like the pans of a balance scale.

• The tip of his tail is shaped like a voting mark.

• He's in charge of Social Studies but is completely burnt out by society. How tragic.

Gender: Neutral Personality: Very mischievous. Height: 180cm

L: Science, Math, Schoding (pet cat), experiments

H: Boring things

• Wears a white T-shirt and a lab coat. Eyes are white. Earrings are a light shape on the left and a Saturn shape on the right.

• The tip of his tail is shaped like 'EC'. (Literally just the letters EC.)

• His personality is basically just Arithmetic but with manners.

• Has a cat named Schoding, short for Schrödinger.

Gender: Neutral Personality: Oblivious with a bit of a tsundere vibe. Height: 160cm

L: English

H: Arithmetic

• Wears a black T-shirt and a navy short-sleeved jacket. (It was originally long-sleeved, but he cut it with scissors himself.)

• Wears glasses and wears a crown shaped like the letter 'E'.

• The tip of his tail is shaped like an 'A' alphabet block.