Anime: Black Butler/Kuroshitsuji
Name: Sebastian Michaelis

B is for BUTLER

A demon. Butler of Ciel Phantomhive. Formed a contract with Ciel after his parents got killed and his house was burned down. After the contract was sealed he now works for the young earl disguised as a BUTLER.

(I do not know how to relay information properly. If you have any questions about him, feel free to ask)