cat, and Rowling has described him as half-Kneazle, an intelligent catlike creature sensitive to dishonesty, explaining his identification of the rat 'Scabbers' as Peter Pettigrew, and of Sirius Black in his dog form. Crookshanks is seen in Prisoner of Azkaban talking to Padfoot in the school grounds. After his original book, he occasionally makes minor appearances to cuddle up to his owner or Harry in the Gryffindor Common Room. In the films, Crookshanks was portrayed by a Persian cat named Pumpkin. Dobby Dobby is the Malfoy family's house-elf. He consistently refers to himself in the third person. He first appears in Harry Potter and the Chamber of Secrets to discourage Harry from returning to Hogwarts. Dobby later tries to keep Harry away from Hogwarts by magically sealing off the hidden entrance to Platform 9¾, only to be foiled when the protagonists pilot Arthur Weasley's flying Ford Anglia to school. During a Quidditch match, Dobby enchants a Bludger to chase Harry, hoping to cause him enough injury to be sent home; but the Bludger only manages to break Harry's arm. Dobby discloses that when an enslaved house-elf is presented with an article of clothing by his or her master, that house-elf is subsequently set free; and when Harry (after returning from the Chamber of Secrets) discovers that Dobby's master is Lucius Malfoy, he tricks Malfoy into setting Dobby free, a feat that secures him the house-elf's undying loyalty. He was now willing to protect Harry regardless of the cost; as he puts it, "Harry Potter set Dobby free!" Dobby returns in Goblet of Fire. Now a free elf, he obtains a paid post at Hogwarts. Dobby also quickly becomes the only house-elf who will clean the Gryffindor common room, when Hermione leaves knitted clothing half-hidden around the room in an attempt to free the elves, which they find insulting. He also helps Harry get through the second task of the Triwizard Tournament by giving him Gillyweed. Dobby later appears in Order of the Phoenix, showing Harry the hidden Room of Requirement, which Harry uses for the secret meetings of Dumbledore's Army. When Professor Umbridge finds the meetings later, Dobby enters to warn the group. In Half-Blood Prince Harry entrusts Dobby to watch his compatriot Kreacher when he orders him to work in the Hogwarts kitchens with the other house-elves; and later assigns both to follow Draco Malfoy. Dobby makes his last