Maybe mrdrnose can make it like the Librarian in the History level where you need to find a certain item to disable it for the rest of the game. The way I see it, the Mannequin looks like another student who was caught by Viktor or the Headteacher and turned into the... thing it is now. It follows the player because it wants the player to free it from it's pain, except little does it know it's mere presence causes the player to go insane. There should be a way to free it and in return it's soul helps you complete the notebooks faster. (Basically, the Language level's versioon of Albert)