Aragog (voiced by Fred Ridgeway), An Acromantula that dwells in the Forbidden Forest.He can also be found right in front of the entrance if Harry goes outside just before Defence Against the Dark Arts. Rubeus Hagrid (voiced by Jonathan Kydd), a very large half-man, half- giant, usually found in his cottage in the grounds.He also is in charge of the Duelling Club, and accompanies Harry and Ron into the Chamber. His classroom is located on the third floor. Professor Lockhart (voiced by Mark Lowenthal), the Defence Against the Dark Arts teacher.She is petrified near the beginning of the game. Mrs Norris: Argus Filch's cat and acts as the caretaker's assistant.His classroom is located on the right side of the second floor. Professor Flitwick (voiced by Allan Corduner), the Charms teacher.She also leads Harry to Dumbledore's study when Nearly Headless Nick has been petrified. If Harry enters a second time, McGonagall will take 5 house points away. If Harry enters the classroom, she will give him a warning and send him out. There is a time in between classes/challenges when the classroom has just been open when McGonagall is holding a class. She isn't seen very often because Harry doesn't have any Transfiguration classes. Her classroom is located on the left side of the second floor. Professor McGonagall (voiced by Ève Karpf), the Transfiguration teacher.If Harry gets caught in the Slytherin common room while sneaking out, Snape shows up and expels him, and Harry will have to try again. Known for being unusually strict, he is usually to be found in the dungeons, near or in his classroom. Professor Snape (voiced by Allan Corduner), the Potions master.He also appears at the end of each day to announce the latest house point totals, and at the end of the year ceremony.
While normally absent from a good part of the game, he features prominently in a cut scene in which he tells Harry that he does not think that Harry is the Heir of Slytherin.