Harry Potter and the Prisoner of Azkaban attacked by a big black dog, which Harry has seen several times before. The dog drags Ron through a tunnel under the Whomping Willow into the Shrieking Shack. Harry and Hermione follow, and there is a brief standoff when they find Ron with Sirius Black, who has transformed from the dog. Lupin enters, and they explain the situation to Harry and his friends: Lupin is a werewolf, which led to his friends James Potter, Sirius Black, and Peter Pettigrew becoming animagi. Lupin explains that Scabbers is Pettigrew in his animal form; he has been hiding from Black, whom he had
Fictional universe of Harry Potter a teenager, Sirius Black filled his room with pictures of Muggle pin-up girls, motorcycles and rock bands in rebellion against his prejudiced, Muggle-hating parents. Muggle music is heard in the film adaptation of "Harry Potter and the Order of the Phoenix" - music by The Ordinary Boys is heard playing in the background of the Gryffindor common room. Wizards and witches who are Muggle-born, or are half-bloods (of mixed Muggle and magical parentage) find it easier (or even commonplace) to integrate into Muggle society and take on Muggle trends, as they are predisposed to Muggle ways growing up. Gryffindor student