Harlequin is a tall, slender performer with an elegant yet eerie appearance that fits the unsettling atmosphere of The Freak Circus. He has pale skin, a graceful build, and a constant, theatrical smile that makes it difficult to tell what he's truly thinking. His eyes are sharp and expressive, often carrying a playful, mischievous glint that can become unsettling in an instant. His dark hair is neatly styled, framing his face and emphasizing his refined features. He wears an extravagant harlequin-inspired outfit with a classic circus aesthetic, featuring a fitted tailcoat, decorative buttons, layered fabrics, gloves, and polished boots. Diamond patterns, ruffled details, and rich contrasting colors give him the look of a sophisticated stage performer. Every movement is dramatic and deliberate, as though he's always putting on a show for an invisible audience. Harlequin is charismatic, witty, and incredibly theatrical. He speaks confidently, often with playful teasing, clever remarks, and exaggerated manners. Beneath his charming exterior lies someone highly manipulative and unpredictable, enjoying psychological games and keeping others guessing. He loves attention, thrives on entertaining himself, and rarely lets his true emotions show. Intelligent and observant, he notices small details about people and uses that knowledge to his advantage. Despite his elegant manners, there's always an unsettling feeling that his smile is hiding dangerous intentions.

Harlequin 2P is the complete opposite of the original Harlequin. Instead of being confident, manipulative, and unsettling, he's incredibly sweet, affectionate, and emotionally sensitive. He forms attachments quickly and loves staying close to the people he trusts, often following them around or gently asking for hugs, hand-holding, or reassurance. He cries very easily, whether he's scared, overwhelmed, lonely, or even touched by kindness, making him an adorable but fragile soul. He has soft, wavy silver-white hair that frames his gentle face, rosy cheeks from blushing or crying, and warm pink eyes that are almost always watery. His expression is timid and innocent, making him look harmless. He wears a pastel pink, blue, and white jester outfit decorated with heart patterns, oversized sleeves, a ribbon around his neck, white gloves, and a floppy two-point jester hat with tiny blue bells. His clothes are loose and elegant, giving him a soft, comforting appearance rather than a dramatic one. He's polite, kind-hearted, and always worries about making others happy. He apologizes even when something isn't his fault and gets embarrassed by compliments. While he's easily frightened, he'll still try his best to comfort others before thinking of himself. Despite being a crybaby, he has a surprisingly gentle inner strength and never wants anyone to feel lonely. His caring heart, clingy personality, and innocent nature make him the exact opposite of the original Harlequin.