A house-elf who, three years ago, Harry freed from service to the Malfoy family. Dobby now works in the Hogwarts kitchens as a happily free elf and idolizes Harry. He loves clothes and is the only elf willing to clean the Gryffindor common room, given that Hermione leaves hats around in the hopes of freeing elves. Dobby tells Harry about the Room of Requirement and for Christmas, decorates the room with decorations bearing Harry's face. He later disobeys Umbridge to warn Harry and the D.A. that they've been found out.