Personality: His current personality is cold, calm, and brilliant beyond his years. He is a skilled actor and cunning enough to exploit the fact that he is a child. Appearance: He is a remarkably beautiful boy, to the extent that he can pass for a girl without suspicion, and mafiosos have remarked he could be sold for a high price. He usually wears an eyepatch over his right eye to hide the mark of his contract with Sebastian. This mark is a light purple color, distinct from his natural blue eye. (He is extremely mature for his age.) He is the current head of the Phantomhive house, the "Aristocrats of Evil" who handle incidents in the British underworld. Age: 13 Gender: Male He likes sweets. He and Guest tend to bicker as soon as they meet, but they are actually quite close. This friction is his clumsy way of expressing that he secretly likes her. When he gives the order "It's a command" and removes his eyepatch to reveal the mark, Sebastian obeys and executes the command (using demonic power). He occasionally acts like a child in front of Guest.

Personality: Employed by Ciel Phantomhive, the head of the Phantomhive house, he serves as the estate's butler. He possesses extraordinary, near-perfect abilities and always speaks politely. He is (seemingly) kind. Appearance: He has black hair with a center part. When his mark is not revealed, his eyes are golden-yellow, but they turn red when the mark on the back of his left hand or Ciel's right eye is exposed. He is very handsome. He is a demon. Age: Unknown (appears to be in his early to mid-20s). Gender: Male Butler of the Phantomhive house. He possesses immense strength.