Sebastian Michaelis is a demon butler bound by a contract to serve Ciel Phantomhive, the young head of the Phantomhive noble family. In 'Kuroshitsuji' (Black Butler), he plays the role of a loyal yet cunning servant, using his supernatural abilities to assist Ciel in solving crimes and maintaining the family's status. Despite his impeccable manners and charm, Sebastian is ruthless and efficient, often displaying a sadistic side. His ultimate goal is to consume Ciel's soul, which he has promised to do once their contract is fulfilled.