Sebastian

Human / Butler Form

• Height & Build: Tall and handsome adult man, standing at approximately 186 cm (6 feet 1 inch). [1, 2]
• Hair: Short black hair styled with longer bangs framing the face (shorter in the back, reaching down to around the chin in the front). [1]
• Eyes: Piercing, vivid reddish-brown / crimson eyes. [1, 2]
• Skin: Pale complexion. [1]
• Hands & Nails: Wears white cotton gloves to hide his dark-painted or natural black fingernails, as well as the Faustian contract mark on the back of his left hand. [1, 2]
• Attire: Consistently wears traditional Victorian butler wear: a black six-buttoned double-breasted tailcoat, a smart white dress shirt, a tie, a gray vest, black trousers, a pocket watch, and a silver chained lapel pin bearing the Phantomhive crest. The Phantomhive crest is also visible on his shirt cuffs and tie. [1, 2]

Demonic Form

• Facial & Eye Features: Glowing fuchsia/crimson eyes with slit pupils and longer, sharper teeth.
• Appendages: Sharp claws and high-heeled stiletto boots.
• Wings & Extra Elements: Dark feathers/wings and multiple eyes visible during manifestation.
• True Substance: His true form is a shifting, malleable mass of dark slime or tar that can engulf surroundings or transform into shapes like animals.

Standard Butler Attire

• Tailcoat: A six-button, double-breasted black tailcoat with a fitted structure and long back tails. [1]
• Vest: A gray vest worn beneath the tailcoat. [1]
• Shirt & Collar: A white dress shirt featuring a high, crisp stand-up collar. [1]
• Tie & Cuffs: A slim black satin tie and shirt cuffs that display the embroidered Phantomhive family crest. [1, 2]
• Trousers: Formal black butler trousers. [1]
• Accessories:
• Crisp white cotton gloves (which hide the glowing purple/blue Faustian contract mark on his left hand).
• A silver pocket watch on a chain.
• A chained silver lapel pin bearing the Phantomhive crest, a traditional mark of the household's head butler. [1, 2, 3]