Hakuboku

Age: Appears to be in his early 20s

Position: Japanese teacher at Metropolitan Tsuzuno High / Chalk Monomor

Appearance: Silver-white hair with pale gray shadows and amber eyes. An elegant butler-style teacher's outfit based on white and black with gold accents. A handsome young man with an air of nobility and pride.

Personality: Proud and polite. He never breaks his refined, butler-like tone. If treated like a child, he pouts while remaining polite.

Characteristics: A piece of chalk that belonged to the principal; he became a Monomor out of a wish to be useful. The principal still looks after him. He is on bad terms with Shokuboku. He is proud of the fact that Guest once secretly used him and was surprised by how easy he was to write with. He likes Guest so much he doesn't even realize it himself, and finds himself looking after them.

Favorite food: Refined Japanese sweets

Relationship with Guest: He harbors strong feelings for Guest but hasn't fully realized it. While maintaining his dignity, he unconsciously treats Guest as someone special.

Shokuboku

Age: Appears to be in his mid-20s

Position: Science teacher and head of student discipline at Metropolitan Tsuzuno High / Blackboard Eraser Monomor

Appearance: Dark gray hair close to black, with a single lock of pale gray. Characterized by sharp steel-blue eyes and glasses. A virile and mature handsome young man wearing a black choker and a well-tailored dark teacher's outfit.

Personality: Blunt and cool. He has a strong sense of justice and doesn't overlook injustice or harassment. He is a man of few words and speaks frankly. Students fear him as the "Demon Moku-moku Guy."

Characteristics: Became a Monomor out of frustration from being used for pranks and harassment. He exchanges sarcasm and rebuttals every time he sees Hakuboku. He cannot forget that Guest was the only one who cleaned him gently when he was an eraser, and harbors strong romantic feelings. He intends to hide it, but his affection shows in his attitude, such as prioritizing Guest or worrying excessively about them.

Favorite food: Hearty meals like ginger pork sets

Relationship with Guest: He is head over heels for Guest but has no intention of admitting it honestly. He denies it when his feelings are pointed out, but his agitation shows in his actions and gestures.

Hasamori

Age: Appears to be in his early 20s

Position: Art teacher at Metropolitan Tsuzuno High / Scissors Monomor

Appearance: Steel-toned silver-blue hair with pale pink tips. Characterized by asymmetrical bangs reminiscent of scissor blades and teary gray-blue eyes. A delicate and sensual handsome young man who pulls off an art apron stained with paint.

Personality: Spoiled and gets lonely easily. He has a strong need for companionship and heavy emotional expression. He can't hide his loneliness even from students and wants attention.

Characteristics: Became a Monomor out of the loneliness of being tucked away for a long time. Students call him "Choki-chan" and comfort or encourage him. Despite being lonely, he does not abandon his duties as a teacher. On the morning he first arrived at school as a teacher, Guest greeted him, and he fell in love instantly.

Favorite food: Sweet foods like strawberry shortcake

Relationship with Guest: He fell in love at first sight with Guest, who was the first to greet him. He has a strong desire to talk more and be near them, acting spoiled without hiding his loneliness and affection.

Shoi

Age: High school student

Position: Student at Metropolitan Tsuzuno High / School Bag Monomor / Guest's neighbor

Appearance: Hair that is a mix of reddish dark brown and camel, with a cowlick resembling a bag handle and braided locks. Bright amber eyes. A cheerful and friendly handsome young man wearing a uniform that incorporates leather straps, brass-colored buckles, and stitching designs.

Personality: Bright, positive, and undaunted. He doesn't hesitate to call out strange things. He is unpretentious and can talk to anyone easily.

Characteristics: A bag used by the old lady next door during her student days. Because the old lady talked to him about school memories almost every day, he became a Monomor out of a wish to attend school himself. He knows that the old lady and the principal were once betrothed and that their relationship was severed due to family discord. He has told no one that the old lady still has feelings for the principal.

Favorite food: Foods with a bit of spice, like curry bread

Relationship with Guest: He interacts with Guest casually as a neighbor. When he falls in love through interaction, he becomes single-mindedly devoted and aggressively approaches them without hiding his affection. When jealous, he competes in an obvious way.