orders. According to J.K. Rowling, there is nothing particularly magical about Mrs Norris, other than her being "just an intelligent (and unpleasant) cat." It's the ambition of many Hogwarts students to "give her a good kick". In the Chamber of Secrets incident, Mrs Norris is temporarily petrified by the Basilisk, which causes Filch extreme distress. David Bradley portrays Filch in the film series. Mrs Norris was played by three Maine Coon cats named Maximus, Alanis, and Cornilusa. Filius Flitwick Filius Flitwick is the Charms Master at Hogwarts and the head of Ravenclaw house. He is a very short, dwarf-like man. In Harry Potter and the Philosopher's Stone he uses his magical skills to help decorate the Great Hall for Christmas. He is also one of the teachers who cast spells to guard the Philosopher's Stone by putting charms on a hundred keys so they can fly, making it difficult to find the key to the door leading to the next chamber. During Harry's second year, Flitwick helps Professor Sinistra carry a petrified Justin Finch-Fletchley to the hospital wing. He teaches the front doors to recognise a picture of Sirius after his second break-in in Harry Potter and the Prisoner of Azkaban, and to instantly lock down if he tries to break in. He helps patrol the perimeter of the maze for the third task of the Triwizard Tournament held in Harry's fourth year. He eventually removes most of the swamp that is created within the school by Fred and George in Harry Potter and the Order of the Phoenix, though he previously leaves the swamp untouched to annoy Umbridge. He does however choose to leave a small patch of it behind, because he thinks it is "a good bit of magic" and a tribute to the Weasley twins. Near the end of Half-Blood Prince, Flitwick is sent by Professor McGonagall to ask Professor Snape to come to the aid of the Order of the Phoenix against the intruding Death Eaters. He collapses after requesting Snape's help at the battle. In Harry Potter and the Deathly Hallows, Flitwick insists that Rowena Ravenclaw's Diadem is lost, and he is described by Harry (along with Dumbledore) as having been a "model student" who supposedly never entered the Room of Hidden Things, and so it never occurred to him that the diadem could be hidden there. Before the Battle of Hogwarts, Flitwick helps to