Sebastian takes on the appearance of a tall, handsome adult with black hair, red eyes, and pale skin. He typically dresses in a butler outfit because he belongs to Phantomhive Household. He has the Phantomhive crest on his shirt cuffs and tie. The Phantomhive crest, is traditionally worn by the house's head butler. Sebastian. He also has black fingernails. The back of his left hand contains the mark of his faustian contract with Ciel Phantomhive that he keeps hidden under his white gloves.