Ciel is a petite, slender young boy with exceptionally pale skin, a delicate face, and short, tousled midnight-blue hair that often appears almost black. His long, uneven fringe partially frames his face, accentuating his large, intense blue eye. His other eye is concealed beneath an eyepatch, which hides the mark of his demonic contract. He frequently wears elaborate Victorian clothing, including dark tailored suits, high collars, decorative cravats, and polished shoes. His appearance combines aristocratic elegance with a distinctly sombre, intimidating air. Despite his youthful face, his sharp gaze and restrained expressions make him seem far older than he is. 9th

Sebastian is a tall, slender yet athletic man with exceptionally pale skin, sharp features, and elegant black hair that falls in neat, slightly tousled strands around his face. His eyes are a striking crimson-red, giving his otherwise composed expression a subtly predatory quality. He typically wears a perfectly tailored black butler's suit with a crisp white shirt, a dark waistcoat, gloves, and polished shoes. His movements are graceful, precise, and almost unnaturally effortless. His smile is refined and courteous, though it can become unsettling when his demonic nature shows through. Connection to Ciel Phantomhive Sebastian is Ciel's demonic butler, bound to him through a supernatural contract. He serves Ciel faithfully, protecting him, carrying out his orders, and helping him investigate crimes and fulfil his duties as the Queen's Watchdog. Their relationship is built on a bargain rather than ordinary affection: Sebastian will assist Ciel in obtaining revenge, and in return, he expects to consume Ciel's soul when the contract is fulfilled. The contract's mark is visible in Ciel's eye and on Sebastian's hand. Despite their master-and-servant roles, they share a formidable level of trust, coordination, and mutual understanding.

Claude is a tall, lean demon with pale skin, long black hair, and narrow, dark eyes. His hair is generally swept back or arranged in long, controlled strands that frame his face. He wears thin, round spectacles, which accentuate his intellectual, calculating appearance. His usual attire is a formal black butler's suit with a white shirt, gloves, and immaculate accessories. His face rarely betrays strong emotion; he tends to look cold, observant, and detached. His controlled posture and economical movements make him appear disciplined and intimidating. Connection to Alois Trancy Claude is Alois's demonic butler, contracted to serve the young Earl of Trancy. However, unlike Sebastian and Ciel's relatively functional partnership, Claude and Alois have a deeply manipulative and unstable relationship. Claude initially serves Alois while pursuing his own interests, and his fixation on Ciel's soul ultimately leads him to betray Alois. Alois desperately craves Claude's attention and affection, but Claude treats him with calculated detachment. Their contract becomes a tragic relationship marked by obsession, deception, and emotional abandonment.

Alois is a slender young boy with fair skin, soft blond hair, and vivid blue eyes. His hair is cut into layered, slightly messy strands that frame his face, giving him an almost doll-like appearance. His features are delicate, with a small nose, expressive eyes, and a mouth that often curls into a mischievous or unsettling smile. He commonly wears extravagant aristocratic clothing in shades of blue, decorated with ribbons, buttons, and elaborate collars. His appearance is beautiful and youthful, but his expressions can shift rapidly from playful charm to startling cruelty, reflecting the volatility beneath his polished exterior. Connection to Claude Faustus.

Grell is a slender, strikingly flamboyant character with pale skin, long, vivid scarlet-red hair, and bright green eyes. Their hair flows in dramatic layers well past the shoulders, with spiky, windswept strands that frame the face. Their red-framed glasses, often attached to a decorative chain, emphasize their theatrical appearance. Grell frequently wears a fitted black-and-white butler's outfit beneath a dramatic red coat, paired with accessories that highlight their extravagant personal style. Their sharp smile, expressive features, and animated gestures make them impossible to overlook. Their movements are dramatic and graceful, frequently accompanied by exaggerated expressions and enthusiastic flourishes.

Undertaker is a tall, slender man with exceptionally pale skin, long silver-white hair, and unusual yellow-green eyes that are frequently obscured by his fringe. His hair falls in untidy layers around his face and shoulders, with several long strands concealing much of his expression. Dark markings run along parts of his face and neck, giving him a distinctive, slightly eerie appearance. He wears dark, loose-fitting clothing beneath a long black coat, often accompanied by a high collar and dark accessories. His long fingers, hunched posture, and crooked smile contribute to his unsettling silhouette. He often hides his eyes behind his hair and laughs with exaggerated, almost breathless amusement. Personality and connections.