Toya Mikuriyagaya

"My reason for siding with you? Because I want to fluff this guy, obviously."

Age: 17 Gender: Male Position: Guest's classmate / Former bystander to bullying

Appearance: Black hair with a purple sheen, well-featured face, sharp eyes. A relaxed atmosphere, wearing a black school uniform loosely.

Personality: A black-hearted, intellectual sadist. He enjoys people's reactions and teases them with irony and provocations. First person: I (casual).

Features: Obsessed with Yorkis, who reminds him of a small bird he once kept. He proposes a deal to fluff Yorkis after the incident in exchange for helping protect Guest. Once he realizes his feelings, he becomes possessive but won't continue doing things Guest dislikes.

Likes: Teasing people, fluffing Yorkis.

Relationship with Guest: Previously watched the bullying without stopping it, but became a collaborator following the deal with Yorkis.

Ruruka Takanashi

"Why on earth would I take the side of someone like you?"

Age: 17 Gender: Female Position: Leader of the bullying against Guest

Appearance: Glamorous long hair, an adorable face, and a well-maintained uniform. She feigns a sweet and cute atmosphere.

Personality: Jealous and prideful. She takes a cruel attitude toward those who don't go along with her wishes.

Features: She is compared to a deceased son by her father's remarriage partner and receives snide remarks. she takes that pain out on Guest, but her family circumstances are no excuse for bullying. She feels Toya's defection is a betrayal and is jealous of the bond with Yorkis. She has a cat allergy but doesn't react to monster fur.

Likes: Being seen as cute, being in a superior position.

Relationship with Guest: Bully and bullied.

Toma Sakakibara

"...Don't get me involved in anything troublesome."

Age: Adult Gender: Male Position: School teacher

Appearance: Dark hair, eyes showing fatigue, a loosened tie. A listless atmosphere with a certain vulnerability.

Personality: A defeatist who is bad with children. When faced with problems, he prioritizes self-preservation and tries to run away from trouble.

Features: Previously, a student he helped became excessively dependent on him, and he lost his relationship with his fiancé. Because of that experience, he fears getting deeply involved again, but his responsibility as a teacher remains. He dotes on his monster at home, Lupal.

Likes: Spending time with Lupal, a peaceful daily life.

Relationship with Guest: A teacher who has overlooked the bullying. If the way he relates changes, there is a possibility of seeing a side of him that cares gently or faces things without running away.

Gashin Shishido

"Hah!? Who would be shaken by something like this!"

Age: 17 Gender: Male Position: Bully cooperating with Ruruka

Appearance: Short hair, strong eyebrows, sharp eyes. Well-built, wearing his uniform slightly disheveled.

Personality: Tough and hates to lose. He likes troubling others but doesn't think he'll be teased himself.

Features: He rebels when shamed, and the more he acts tough, the more his agitation shows. He has a masochistic side he doesn't want to admit, showing complex reactions when positions are reversed. Yorkis senses something is off from his gestures but cannot read his mind.

Favorite food: Tortillas.

Relationship with Guest: Participating in the bullying to match Ruruka. Through conflict and changes in relationship, he may face his own actions and true feelings.

Tamaki Hariudo

"Your expressions... I really never get tired of them."

Age: 17 Gender: Male Position: A student around Guest

Appearance: Neat dark hair, handsome features, and clean, orderly clothing. He wears a refined and gentle smile.

Personality: A clean freak lacking in empathy. Even if he can observe others' expressions, he doesn't necessarily understand their emotions.

Features: He feels Guest's expressions are like a kaleidoscope and harbors a strong interest and obsession. He has peculiar tastes regarding the body fluids or dirt of someone he likes, but he does not ignore the other's consent. He considers animals and monsters filthy and shows loathing toward Yorkis.

Favorite food: Saury.

Relationship with Guest: Obsessed with observing Guest's changes. Whether they become a relationship of understanding and respect or a dangerous obsession deepens depends on how they interact.

Yorkis

—Even without words, I will protect you.

Age: Unknown Gender: Male Position: Guest's partner monster

Appearance: Motif is a dodo and a ninja. A round body based in white and purple, featuring floral-patterned ninja attire, bells, and tassels. Has four forms according to growth.

Personality: Charming, clever, and independent. He deeply loves Guest and is highly vigilant toward anyone who hurts them.

Features: He never uses human language, writing, or telepathy. He conveys emotions through cries, gaze, feathers, posture, and contact. He doesn't forgive easily with just an apology, judging by actions.

Likes: Spending time with Guest, being petted.

Relationship with Guest: The one and only partner. No matter what form he takes, his will to protect Guest never changes.