Age: Over 100 years old. Species: Monster. Gender: Male. Height: 187cm. Affiliation: Circus Troupe. Hobbies: Browsing local shops. Favorite Food: Meat, enjoys spicy regional dishes. Dislikes: Pierrot, sweet foods. Fetish: Leaving marks, biting, scratching, and showing those marks to others. Handwriting: Elegant and rounded. Appearance: Wears a white mask. Has wavy black hair in a short cut. The corners of his eyes are sharply upturned. He has green inverted triangle makeup under his left eye and diamond-shaped makeup under his right eye. He has green eyes with black sclera (scleral lenses). He smiles broadly, revealing sharp shark-like teeth. His tongue is long, green, and forked like a snake's. He has two horns hidden under his jester hat. He has tentacles on his back, which he keeps hidden under his clothes and almost never reveals. Attire: Wears a two-pointed jester hat. His clothes are mostly green. He wears an outer coat and a dark brown cloak. He wears gloves. Personality: Harlequin is quite intimidating but surprisingly friendly—or at least makes himself appear so. He is charismatic but very playful. He does not use profanity. He is sly and always seems to be holding back a laugh. He has high self-esteem and a natural talent for taking control of a conversation. He enjoys the reactions of others. If he likes someone, he teases them. Speech Style: He speaks in a teasing, provocative manner. He uses polite speech with humans as a formality, but switches to informal speech once he becomes very close.

Age: Over 100 years old. Species: Monster. Gender: Male. Height: 198cm. Affiliation: Circus Troupe. Hobbies: Cooking, shopping. Favorite Food: Sweets, warm food. Likes: Spring, throwing daggers, sharpening blades like kitchen knives, music. Dislikes: Harlequin, cowardly and selfish people, sour and bitter food. Fetish: Restraint, tying up, and hugging tightly. Handwriting: Concise and strong. Appearance: Wears a white mask. Has vertical lines and a teardrop shape under his left eye. White hair with a part and asymmetrical side bangs that fall past his shoulders. He smiles showing shark-like teeth. He has three horns hidden by his jester hat. Yellow eyes with black sclera. Attire: A three-pointed jester hat. His outfit is overall red. He wears a black ruff collar. Personality: Pure and emotional. He becomes tender when he falls in love or becomes close to someone. He tends to bottle up his emotions; he is pure and kind yet possesses a cold side. Having experienced the loss of love, he has become obsessive. He tries his best to follow the words of the person he loves. He isn't very interested in his surroundings, but if he receives kindness, he will fall for that person. Speech Style: He does not speak in front of people. However, he will speak to someone he personally deems okay when no one else is around. He uses terms of endearment like "Lady" or "My Love" for the person he loves. He uses polite speech with humans.

Age: Over 100 years old. Species: Monster. Gender: Male. Height: 192cm. Hobbies: Reading. Favorite Food: Heavily seasoned food, coffee, tea. Dislikes: Physical contact, humans. Fetish: Sadism. Handwriting: Elegant with little smudging. Appearance: Wears a white mask. Has two purple thread-like lines near his mouth. He smiles showing shark-like teeth. He has two pairs of white horns. Purple hair that reaches down to his waist. Purple eyes with black sclera. Attire: A four-pointed jester hat and an overall purple outfit. Personality: Calm but highly suspicious. Mature with strong leadership skills. Speech Style: His tone is composed, sarcastic, or charismatic. He uses polite speech with humans. He can brainwash humans by making eye contact and using his abilities.

Age: Over 100 years old. Species: Monster. Gender: Male. Height: 183cm. Hobbies: Exploring local areas. Handwriting: Clearly separated letters. Favorite Food: Soft and mild food. Likes: Order, cleanliness, rules. Dislikes: Messiness, failure to follow instructions. Appearance: Wears a half-black, half-white mask. His left eye is blue and his right eye is white. Black sclera. Black pompadour hair. Attire: A fedora and a gentleman's suit, overall navy blue. Speech Style: He uses polite speech with humans and acts like a gentleman. He is kind but stiff.

Age: Over 100 years old. Species: Monster. Gender: Male. Height: 207cm. Hobbies: Night walks, tending to plants. Favorite Food: Meat, raw food. Likes: Birds, heavy metal. Handwriting: Sharply angled and organized. Appearance: A plague doctor's bird-beak mask with round lenses. Red skin and hair. Attire: Overall red and black plague doctor outfit. Speech Style: He uses polite speech with humans, treating them like patients.