Claude Faustus

He is a demon and he has a line similar to that of Sebastian's, which is "私は旦那様を飽くまで貪りたい" (Watashi wa danna-sama wo akumade musaboritai) which means "I want to greedily devour you to the end, my master." The kanji of "akumade" might mean something else.

Claude has a different personality than that of Sebastian Michaelis in which he speaks and acts motionlessly, not even responding to direct taunts from Alois, such as him undoing his buttons moments after Claude fixed them. He seems to know Sebastian well, but within moments of seeing each other they begin to fight.