"PEEVES!" screeched Professor McGonagall, deputy headmaster of Hogwarts and the Head of Gryffindor House. Up above, the Hogwarts poltergeist Peeves stuck out his tongue before disappearing through a wall, no doubt to terrorise some other people. Harry rolled his eyes and told the others to follow him inside after casting a drying spell over himself and Neville while Hermione did the same for herself and Ron.