Hermione Granger completing Snape's homework assignment from the class, while Crookshanks proves vital in exposing Scabbers as Peter Pettigrew, a friend of James and Lily Potter who revealed their whereabouts to Lord Voldemort the night of their murders, and was able to wrongly implicate Sirius Black (revealed to be Harry's godfather) in the Potters' deaths. The Time-Turner enables Hermione and Harry to rescue Sirius and the hippogriff Buckbeak. Hermione is horrified by the cruelty that house-elves suffer, and establishes S.P.E.W., the Society for the Promotion of Elfish Welfare, as an effort to gain basic rights for them. She is Bulgarian Quidditch prodigy
Hermione Granger always keeps her attention focused on the job that must be done." Despite Hermione's intelligence and bossy attitude, Rowling says that Hermione has "quite a lot of vulnerability in her personality," as well as a "sense of insecurity underneath," feels, "utterly inadequate... and to compensate, she tries to be the best at everything at school, projecting a false confidence that can irritate people." During her Defence against the Dark Arts exam at the end of "Harry Potter and the Prisoner of Azkaban", Hermione reveals that her biggest fear is failure, after a Boggart takes the form of Professor McGonagall and