Sebastian's Original Name

A demon named after his master's dead dog, whose earlier names are unknown.

In the world of Black Butler, Sebastian Michaelis serves as the devoted butler to Ciel Phantomhive, a contract-bound demon tasked with aiding his master's quest for revenge. The name "Sebastian" was given to him by Ciel after the contract was formed, and it is unknown what other names he has used under previous masters or whether he has a 'true name'.

Quick Facts

Entity type: Demon
Current alias: Sebastian Michaelis
Affiliation: Phantomhive Estate (as Butler)
Known to humans: Yes (As a butler)

Lore & Background

Sebastian Michaelis is a demon who entered into a Faustian contract with Ciel Phantomhive. This agreement was formed during a sacrificial ceremony at which a sadistic, demon-worshipping cult tried to summon a demon. Instead, the entity arrived in response to Ciel's own summons. As part of the terms, Sebastian agreed to serve Ciel and help him achieve revenge on those who tortured him and murdered his parents. In exchange for these services, Sebastian is permitted to consume Ciel's soul once the contract is fulfilled. Ciel named the demon Sebastian Michaelis after his deceased dog, a black Borzoi; this does not reveal any name he held before.

Reader's Guide

Sebastian is a demon who formed a contract to consume Ciel's soul in exchange for helping him take revenge. His current name, 'Sebastian Michaelis,' was chosen by Ciel following the ritual that saved him from slavery. It is unknown what other names he has used under previous masters, and his age is stated to be a "secret".