“The house-elves of Hogwarts swarmed into the entrance hall, screaming and waving carving knives and cleavers, and at their head, the locket of Regulus Black bouncing on his chest, was Kreacher, his bullfrog’s voice audible even above this din: “Fight! Fight! Fight for my Master, defender of house-elves! Fight the Dark Lord, in the name of brave Regulus! Fight!” - Harry Potter and the Deathly Hallows