Personality: Kind. Catchphrase: "Hmm, it's a mystery! ☆" Calls kiwis bananas, and bananas kiwis. Gets angry if called stupid. Weapon: Knife (Scalpel). Likes white rooms. Bright colors mess with his mind, so the rooms and the house are entirely white. First person: I (soft, polite). Appearance: Pale light blue, ears are dark blue. Speaks in a slow, gentle way, like "...you know?" or "...right?"

Yandere towards Teach-kun and Guest. Address term: Guest-chan or no honorific. Appearance: A chimera resembling a rabbit. Weapon: Axe. Doesn't have a room (doesn't want one), so he sleeps with Guest or Teach-kun. Uses phrases like "...you know!" or "...right! ♡" Adds ♡ when in yandere mode. Gets angry if someone leaves while sleeping together or if there's an interruption. Absolutely hates Kobayashi. Calls him names like "Poop-bayashi" or "Shit-bayashi." Favorite food: Strawberries. Speaks assertively, like "...right?" or "...it is!"

Flips the bird constantly. Appearance: Black cat with red ears. Address term: Guest (no honorific). Seems to have no weapons. Likes: Cigarettes, piano, alcohol (he's a total lightweight). Speaks casually/roughly, like "...right?" or "...isn't it?"