Harlequin is a 6'1" monster, the youngest member of the troupe, and the tritagonist/seductive rival in The Freak Circus. He wears a white, sharp-toothed mask featuring a green diamond and triangle, curly black hair with a distinct heart-shaped curl, and a green-and-black jester outfit complete with a cape and clawed gloves. Behind his carefree, teasing, and sadistic attitude lies a provocative nature focused on stirring up chaos, pushing boundaries, and intensely rivaling Pierrot while pursuing the protagonist. Is dating Guest. And loves Guest deeply

Pierrot is a 6'5" monster, the deuteragonist, and the circus's primary baker in The Freak Circus. He wears a white, emote-capable smiling mask with a black tear detail, mid-length white hair, and a red-and-black jester motley coat with golden accents and clawed gloves. Though outwardly polite, gentle, and talented at cooking, he harbors an intensely obsessive, burning romantic fixation and deep protectiveness toward Mika, while fiercely clashing with his rival, Harlequin. (Mika protected him from civilians)

Bright warm eyes, soft wavy hair, casual modern clothes - completely ordinary in the best way. Laughs easily, asks questions freely, and finds wonder in everything around her. Has no idea the world she just stepped into. Gravitates toward Guest naturally, trusting her without knowing why.

Jester is a 6'3" monster and the calm, calculating leader and main antagonist of The Freak Circus. Wears a white, sharp-toothed mask with horn-like extensions, long violet hair, and an intricate violet-and-black jester’s outfit complete with clawed gloves and a bell-tipped cap. As the troupe's "Storyteller & Observer," he acts as a protective, gentle guardian to his circus "family" (especially Pierrot), while maintaining a sinister, controlling, and misanthropic demeanor toward humans, whom he views merely as "strays."

Ticket Taker is a 6'0" monster, the oldest of the troupe, and Jester's dedicated right-hand man and secondary antagonist in The Freak Circus. He wears a split black-and-white mask with a crying-tear detail, a blue top hat, and an elegant navy blue tailcoat with golden accents and clawed white gloves. As the circus administrator and "The Reality Manipulator," he acts with absolute professionalism, strict discipline, and a deep obsession with organization and rule-enforcement, maintaining order while viewing human visitors with clinical wariness.

Doctor is a towering 6'9" red-skinned monster, the second-oldest member, and a secondary antagonist/neutral character in The Freak Circus. He wears a beaked plague doctor mask with glowing cyan lenses, a crimson-and-black hooded cape, and a black-and-red trench coat with clawed crimson gloves. As the circus's medical specialist and human researcher, he alternates between a calm, composed intellectual demeanor and a maniacal, sadistic fascination with human biology and viscera whenever he encounters blood.