<P> Others who end up under her care expose more of her personality . In Chamber of Secrets, Hermione ends up in the hospital wing for a month after a mishap with the Polyjuice Potion leaves her half - feline . Pomfrey is careful to keep this a secret . In Order of the Phoenix, after Umbridge's henchmen stun McGonagall, Madam Pomfrey says she would resign in protest were she not afraid of what would become of the students without her presence . In Half - Blood Prince, she attempts to heal Bill of his scars from Greyback's attack without much success, and bursts into tears when she hears of Dumbledore's death . In Deathly Hallows, she and Filch oversee the evacuation of Hogwarts before the battle . She is later seen tending to the injured fighters . </P> <P> Gemma Jones appeared as Madam Pomfrey in the film adaptations of Chamber of Secrets, Half Blood Prince, and Deathly Hallows--Part 2 . </P> <P> Quirinus Quirrell is a fictional character in Harry Potter and the Philosopher's Stone, the first novel in the Harry Potter series written by J.K. Rowling . Though the character's first name was never mentioned in the novels, the character is given the first name "Quirinus" in the official Harry Potter Trading Card Game . Quirrell is the Defence Against the Dark Arts teacher at Hogwarts during Harry's first year and secretly a Death Eater . Prior to his employment at Hogwarts, he is said by Hagrid to have had a "brilliant mind", and was a fine teacher while studying from books; some time before Harry's arrival at Hogwarts, "he took a year off to get some first - hand experience". Rowling stated in a live web chat on 30 July 2007 that Quirrell had worked at Hogwarts as Muggle Studies teacher for a certain length of time, before taking the cursed Defence Against the Dark Arts position in the same year that Harry joined . There were rumours that he encountered vampires in the Black Forest and one in Romania, and he apparently had "a nasty bit of trouble with a hag". After that, he was' never the same'--upon his return, he appears perpetually nervous and has developed a stutter and nervous tics and Hagrid was able to say even before the beginning of the autumn term that he was "scared of the students, scared of his own subject". Quirrell's attire includes a new purple turban which he claims to have received as a reward from an African prince for getting rid of a troublesome zombie . Fred and George constantly joke that the turban was full of garlic to ward away vampires and in one part they even enchant snowballs to hit it . According to JK Rowling, Quirrell taught Muggle Studies before Harry studied at Hogwarts, which explains why he was a teacher before but at the same time only a Defence Against the Dark Arts teacher for one year . </P> <P> Harry first meets Quirrell at the Leaky Cauldron, while being escorted by Hagrid to Diagon Alley to shop for school supplies . Quirrell is next seen at Hogwarts conversing with Snape at the start - of - term banquet, and then regularly while teaching Defence Against the Dark Arts lessons . During the school's Halloween banquet, Quirrell appears in the Great Hall to warn staff and students of a troll in the dungeons and then he faints, so he can freely make his way to the third - floor corridor where the Stone is hidden . Snape who, apparently, already suspected Quirrell was up to something, goes to the third floor in order to stop him . In later novels, the readers learn that Dumbledore had told Snape to keep an eye on the DADA (Defence Against the Dark Arts) professor . Quirrell is unable to get to the Stone, but in the process, Snape is bitten by Fluffy . When Harry and his friends see that Snape has been bitten, they begin to suspect Snape is after the Stone for himself . While playing Quidditch, Harry is almost thrown off his broom by some sort of curse and he, Ron, and Hermione believe it is Snape who is responsible . They begin to suspect that Snape is trying to steal the Stone hidden in a secret chamber in Hogwarts; however, when Harry finally arrives in the chamber, he discovers that it is not Snape, but Quirrell, who is the real villain . </P>

Who became the headmaster of hogwarts after snape