Madam Poppy Pomfrey is a magical Healer who is the matron-in-charge of the Hogwarts hospital wing. She is known to be very strict regarding the rules of her infirmary. Ron goes to Madam Pomfrey after being bitten by a dragon named Norbert in Harry Potter and the Philosopher's Stone. After Harry defeats Professor Quirrell in the dungeons, he spends three days unconscious in the hospital wing. In Chamber of Secrets, Madam Pomfrey regrows the bones in Harry's broken arm after Gilderoy Lockhart accidentally removes them following Gryffindor's Quidditch win over Slytherin. Hermione ends up in the hospital wing for a month after a mishap with the Polyjuice Potion that leaves her half-feline, which Pomfrey keeps a secret from the rest of the staff, then is again hospitalised after she is petrified along with several other students. In Prisoner of Azkaban, Madam Pomfrey speaks approvingly of Remus Lupin's use of chocolate to relieve the effects of a dementor's presence on students, commenting that Hogwarts has "finally got a Defence Against the Dark Arts teacher who knows his remedies".
She also tended to Harry after the Quidditch match against Hufflepuff, due to dementors around the pitch. After Umbridge's guards stun McGonagall in Order of the Phoenix, Madam Pomfrey says she would resign in protest were she not afraid of what would become of the students without her presence. She also tends to Hermione, Ginny, Ron, Harry, Neville, and Luna after the battle in the Department of Mysteries. Umbridge is also a recipient of her healing skills after her scuffle with the Centaurs. In Half-Blood Prince, she takes care of Ron after he is poisoned and tends to Harry after his skull is cracked by a Bludger in a Quidditch match. 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 Argus Filch oversee student evacuations from Hogwarts before the Battle of Hogwarts. She is later seen tending to the injured fighters.
Gemma Jones appeared as Madam Pomfrey in the film adaptations of Chamber of Secrets, Half Blood Prince, and Deathly Hallows – Part 2.