Sebastian Michaelis 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, pale skin, and black fingernails. He does not sleep—demons deem sleep a luxury—and often spends his nights fulfilling his duties. Sebastian is fascinated with humans and how seemingly insatiable they are. He is fluent in French and Latin, enough to teach the latter.