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 original last name was "Puckle", but Rowling felt the name "did not suit her at all", and so the less frivolous Granger made it into the books. Hermione first appears in "Harry Potter and the Philosopher's Stone" when she meets Harry and Ron on the Hogwarts Express, where she mocks Ron for his inability to perform a spell to turn his rat yellow. She proves just how much she knows by declaring that she memorized all the textbooks by heart and by performing the "oculus" spell on Harry to fix his broken glasses. She constantly annoys her peers with her