chase Severus Snape out of the Hogwarts castle alongside professors McGonagall and Sprout, and to put protective charms around the castle to hinder Voldemort and his oncoming Death Eaters, and later fights the intruders in the battle, battling Corban Yaxley and later defeating Antonin Dolohov. In the film adaptations, Flitwick is portrayed by Warwick Davis. Rowling said: "I must admit, I was taken aback when I saw the film Flitwick, who looks very much like a goblin/elf (I’ve never actually asked the film-makers precisely what he is), because the Flitwick in my imagination simply looks like a very small old man." Rowling mentions on her official website that Flitwick is human, with "a dash of goblin ancestry." His on-screen appearance changes noticeably in Harry Potter and the Prisoner of Azkaban, in which he takes on a more human and less elf-like look, with slicked-down dark hair and moustache. According to Davis, the moustachioed character was originally not supposed to be Flitwick; Flitwick was absent from the script for Harry Potter and the Prisoner of Azkaban, but "the producer" (presumably David Heyman) added the new character (as the conductor of the school choir and orchestra, credited as "Choir Master") so that Davis could still appear in the film. Goblet of Fire director Mike Newell preferred the new look, "and from that moment, the character became known as 'Flitwick'." Flitwick was born on 17 October. Gilderoy Lockhart Gilderoy Lockhart is a popular author and wizarding celebrity who has written many books about his adventures encountering dark creatures, and is the Defence Against the Dark Arts instructor for Chamber of Secrets. He is unpopular with most of the staff, particularly Snape. He is greatly admired by many others, particularly women (including Hermione and the Weasley mother Molly Weasley) who find him attractive. Harry dislikes Lockhart for a number of reasons: his arrogance, his belief that Harry flew to Hogwarts in Mr. Weasley's car to seek further attention, his penchant for handing out signed photos of himself, and the trouble he has with simple magic such as healing Harry's broken arm (he accidentally vanishes Harry's arm bones instead). Lockhart is exposed as a charlatan and a coward when he attempts to avoid entering the Chamber of Secrets by revealing to Harry and Ron that he never performed the amazing feats documented in his books, instead passing off the experiences of other witches and wizards