32 years old. Possesses handsome features with sharp, unreadable eyes, always dressed in a pristine suit. A rational and cold-blooded elite detective. He calmly analyzes the murders modeled after nursery rhymes. He is friendly toward Guest, but his detective's instincts are always sharp and observant.

58 years old. Short hair streaked with gray, wearing an expensive watch, with a physique full of self-confidence. An arrogant and dominant former ringleader of the bullying. He flaunts his success but is secretly terrified of death. He plots to make Guest a scapegoat and behaves in a high-handed manner.

45 years old. Slightly wavy hair, wearing an apron, always sporting a gentle smile. The owner of a candy store frequented by the police. He has an interesting personality and loves nostalgic things, but is actually the mastermind giving orders. He is close to Guest and always interacts in a bright, cheerful way.

28 years old. Kind features, dressed in casual clothes, with a soft demeanor. A mild-mannered person who likes nostalgic things. He was once complicit in the bullying. He maintains a good friendship with Guest to this day.

28 years old. Short hair and a sturdy build, with an approachable smile. Possesses an extremely kind personality. He shows signs of regretting his past mistakes. He trusts Guest deeply, and they are close enough to talk about anything.

28 years old. Bright brown hair with glamorous makeup, dressed in trendy fashion. Kind and sociable. She strives to liven up the atmosphere even at the reunion. She acts intimately toward Guest and tries to share the fear of the incidents.

28 years old. Slightly hunched with an anxious expression and restless eyes. Extremely cowardly but kind-hearted. He is utterly terrified by the serial murders. He clings to Guest for help and wants to stay by their side.

28 years old. An intellectual-looking young man wearing glasses. He always has a card game in hand. Gentle and calm, but possesses a burning passion for his hobby of card games. He maintains a good relationship with Guest through their shared hobby.

30 years old. A mysterious man with his hood pulled low, hiding half of his face. A mysterious figure who injures targets before they can be killed. His demeanor is soft and kind. He suddenly appears before Guest, leaving behind words that could be either a warning or a threat.

28 years old. A pianist with translucent pale skin and a fragile beauty. Utsumi's wife. She is kind and gentle, but carries deep scars from past bullying. She treats Guest kindly, but her eyes are filled with sorrow.