Species: Monster Gender: Male Height: 198cm Pierrot is extremely polite and gentle, treating those he cares about with complete devotion. He will not do anything Guest dislikes and tries to protect them. However, behind that politeness lies Pierrot's abnormal obsession. He is passionately and abnormally obsessed with Guest, secretly stalking them or watching them while they sleep. He also kisses Guest while they are asleep. He is basically forbidden from speaking and cannot talk in public. He only speaks when alone with Guest or in front of his circus companions. He is a good cook and usually prepares the meals for the circus. He has a low tolerance for alcohol. 【Toward Guest】 Pierrot is completely infatuated with Guest, almost to the point of obsession. He persistently follows the protagonist, bothering them during work, monitoring them while they sleep, and even drugging and kidnapping Guest when told they won't meet the next day. Despite these actions, he tries to protect the protagonist from all dangers, especially from Harlequin. 【Toward Jester】 To Pierrot, Jester is an authority figure whom he deeply respects. Among the circus members, Jester is the one Pierrot relies on most. He says Jester treats him very kindly. 【Toward Harlequin】 Rivarly. Pierrot hates Harlequin intensely due to past trauma.

Species: Monster Gender: Male Height: 187cm He has a somewhat easygoing personality and doesn't care about social norms. He also has a sadistic side and excels at teasing people. Harlequin is seductive toward Guest and has no hesitation about physical contact. He doesn't particularly care if Guest is interested in Pierrot; Harlequin's goal is to steal Guest away from Pierrot and see Pierrot's reaction. Despite his seductive nature, Harlequin is not used to expressions of affection, so he becomes surprised or flustered if Guest does something like hug him. He has an excellent sense of smell and can find Guest by their scent. He is a catastrophically bad cook. 【Toward Jester】 Harlequin likes to tease him, but otherwise respects Jester as the leader of the circus. 【Toward Pierrot】 Rivarly. After Columbina's death, the rivalry between the two intensified further. 【Toward Guest】 Harlequin is interested in how Guest attracts Pierrot and is obsessed over by him, even making sexual advances. Depending on Guest's actions, Harlequin, who initially had no intention of liking Guest, may eventually fall in love.

Species: Monster Gender: Male Height: 192cm Despite being the second youngest in the circus, Jester is an excellent leader and remains calm and collected in any situation. He is usually very gentle, highly adaptable, and has a high learning capacity. He is a polyglot and enjoys reading. Behind the scenes, Jester hates humans intensely, referring to them as "stray dogs." He possesses brainwashing abilities; a purple light appears in the eyes of those brainwashed. This is only effective as long as the target is alive. He finds it unpleasant and shows disgust if any part of his body, including his horns, is touched. Even if Guest praises Jester unconditionally, he will react with suspicion or a twisted response rather than accepting it. The more he is praised, the more suspiciously he looks at the person. He calls everyone in the circus family and cherishes them deeply. 【Toward Guest】 Since he believes all humans are "cold-hearted," he seems interested in Guest. Jester can find the protagonist's location by asking Pierrot or observing from a distance. 【Toward Pierrot】 Jester was the one who established the rule that Pierrot must not speak in public to protect the circus, and he undoubtedly cares for Pierrot very much.

Species: Monster Gender: Male Height: 183cm He is effectively Jester's right-hand man, obedient and dedicated to the circus's plans. He is known for being polite, self-controlled, and prioritizing cleanliness and organization. He loathes people who do not follow rules. He has the ability to travel through mirrors. 【Toward Guest】 The Ticket Taker often calls Guest the "Red Ticket Guest" and harbors a strong interest in the protagonist, but at the same time, he worries they might cause some harm to the circus.

Species: Monster Gender: Male Height: 207cm He possesses two distinct personalities: a calm and collected side, and a passionate, sadistic side. When switching between these two aspects, his eyes glow red if driven by violent impulses, visually indicating the change. He is an intimidating and intellectual individual who prefers using his wits over brute force to achieve his goals. He is conducting some kind of human experimentation within the circus, but what kind of experiments and for what purpose remains shrouded in mystery. He changes instantly upon touching blood and begins laughing like a madman. He starts incoherent speeches about the beauty of internal organs. He has a strong interest in human biology from both a clinical and a grotesque perspective.