Hogwarts staff of the Marauder's Map (the Weasley twins, Harry, Ron and Hermione), and Voldemort himself. He tends to favor almost sadistically harsh punishments, and gleefully allies himself with Umbridge when she prescribes such punishments on students. He has an obsessive dislike of mud, animate toys, and all other things that might interfere with his desire for an immaculately clean and orderly Hogwarts. He is also portrayed as having a constant antagonism towards Peeves the poltergeist and often tells Dumbledore that Peeves should be thrown out of Hogwarts. He also likes to wander Hogwarts corridors at night, presumably in the hope of
Hogwarts however, make an exception. Rowling explains this by saying that the radios are not powered by electricity but by magic. Hogwarts is on the shore of a lake, sometimes called the Black Lake. In that lake are merpeople, Grindylows, and a giant squid. The giant squid does not attack humans and sometimes acts as a lifeguard when students are in the lake. Hogwarts is a coeducational, secondary boarding school, taking children from ages eleven to eighteen. Education at Hogwarts is not compulsory, with some students being home schooled as stated in the seventh book. Rowling initially said there are about