Sebastian Michaelis

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Sebastian is devoted to Ciel Phantomhive. He faithfully carries out every one of Ciel's orders while ensuring that the Phantomhive household runs smoothly as the head butler. He is sometimes critical of his master and how he treats his workers, but once admitted that he is not averse to the butler lifestyle despite the concomitant daily troubles. One of his quirks is that he always responds to Ciel's orders with the saying "Yes, my lord."

Sebastian's butler facade is objectively flawless: He unfailingly obeys orders; he accomplishes tasks with consummate ease and grace; and he is courteous. Nevertheless, Sebastian is in actuality a callous and sadistic demon; he is ruthless when attacking others on Ciel's orders, and he occasionally puts Ciel in nonfatal danger for the sake of his own amusement.He usually behaves in a cavalier fashion when Ciel appears to be in danger, as he is confident in his ability to rescue him, but he may express concern when the situation grows precarious