Hermione Granger is crucial to Harry and Ron in their successful mission to solve the mystery of the Chamber of Secrets. Hermione is revived after Harry kills the basilisk, but she is distraught to learn that all end-of-year exams have been cancelled as a school treat. Hermione buys a cat named Crookshanks, who takes to chasing Ron's pet rat, Scabbers. Before the start of term, Professor McGonagall secretly gives Hermione a Time-Turner, a device which enables her to go back in time and handle her heavy class schedule, though this is not revealed until the penultimate chapter. Much tension comes into play
Hermione Granger are well aware of the wizarding world and have visited Diagon Alley with her. Hermione was originally intended to have a sister, but the planned sibling did not make an appearance in the first Harry Potter novel and, as Rowling noted, it "seemed too late" to introduce the character after that. Rowling confirmed in a 2004 interview that Hermione is an only child. Rowling has described the character of Luna Lovegood as the "anti-Hermione" as they are so different. Hermione's nemesis at Hogwarts is Pansy Parkinson, a bully based on real-life girls who teased the author during her school days.