Sebastian Michaelis (セバスチャン・ミカエリス, Sebasuchan Mikaerisu) is the demon butler and a senior staff member of the Phantomhive household.

Sebastian takes on the appearance of a tall, handsome adult with black hair, reddish brown eyes,[3] pale skin, and black fingernails. The back of his left hand contains the mark of his Faustian contract with Ciel Phantomhive.[4]

Sebastian typically dresses in a butler's outfit, which consists of black trousers, a six-buttoned double-breasted tailcoat, and a gray 