Madam Poppy Pomfrey is the matron in charge of the Hospital Wing at Hogwarts School of Witchcraft and Wizardry. A highly competent and strict Healer, she is responsible for the health and well-being of all students and staff at the school. Throughout the series, she serves as the primary caregiver for Harry Potter and his friends, frequently treating their many injuries sustained from Quidditch, dangerous magical encounters, and battles against Dark Arts. Despite her stern and no-nonsense demeanor, she is deeply caring and fiercely protective of her charges.
Madam Pomfrey's early life and Hogwarts house are unknown. She has served as the Hogwarts matron for many decades, having been on staff during the time of the Marauders.
Madam Pomfrey's first notable patient is Neville Longbottom, whose wrist she mends after a flying lesson accident. She later treats Ron Weasley for a dragon bite from Norbert, the Norwegian Ridgeback. Her most significant role is in caring for Harry Potter after his confrontation with Professor Quirrell over the Philosopher's Stone. She keeps Harry in the Hospital Wing for three days, managing his recovery and carefully regulating his visitors, which include Albus Dumbledore, Rubeus Hagrid, and the Weasley family.
Madam Pomfrey is kept exceptionally busy this year. She is forced to regrow all thirty-three bones in Harry's arm using Skele-Gro after Gilderoy Lockhart disastrously attempts to mend it with a charm. She also treats Hermione Granger when a Polyjuice Potion mishap leaves her partially transformed into a cat. Most critically, she cares for the petrified victims of the Basilisk, including Mrs Norris, Colin Creevey, Justin Finch-Fletchley, Nearly Headless Nick, and later Hermione. She expresses immense relief when Professor Sprout's Mandrake Restorative Draught is finally ready.
She tends to Harry after he is attacked by Dementors during a Quidditch match against Hufflepuff, expressing her disapproval of the sport. It is revealed that she is aware of Remus Lupin's lycanthropy, having managed his condition during his own school days by providing a secure place for him during his transformations. Following the events at the Shrieking Shack and the lake, she treats Harry, Ron, and Hermione for their various injuries, keeping them securely in the Hospital Wing while Sirius Black's fate is decided.
During the Triwizard Tournament, Madam Pomfrey is on high alert, treating various champions and students. After the final task, she tends to a traumatised and injured Harry following his duel with Lord Voldemort. She is fiercely protective of him, clashing with Minister for Magic Cornelius Fudge and even Dumbledore to ensure Harry gets the rest he needs, free from questioning.
Madam Pomfrey's principles are highlighted as she expresses her disgust with Dolores Umbridge's cruel methods, particularly the use of a Black Quill for detentions. After Umbridge and her Aurors brutally attack Minerva McGonagall, Madam Pomfrey is outraged, stating that she would resign in protest if she did not feel a profound duty to protect the students from the High Inquisitor. She later tends to the six members of Dumbledore's Army who were injured in the Battle of the Department of Mysteries.
She heals Harry's cracked skull, a result of a Bludger hit by Cormac McLaggen during a Quidditch match. She cares for Katie Bell after she touches a cursed opal necklace and treats Ron after he is poisoned. Following the Battle of the Astronomy Tower, she tends to the wounded, most notably Bill Weasley, who was savaged by the werewolf Fenrir Greyback.
Madam Pomfrey remains at Hogwarts during the school year under the control of Lord Voldemort and the Carrows, doing her best to protect and heal the students who suffer under their regime. During the Battle of Hogwarts, she is seen in the Great Hall, which has been converted into a temporary casualty ward, tirelessly working to heal the injured fighters and tend to the fallen.
Madam Pomfrey is described as a kind-looking but strict-faced witch. Her personality is defined by a professional, no-nonsense attitude towards her work. She runs the Hospital Wing with absolute authority, strictly enforcing rules about visiting hours and patient recovery times. Despite her stern exterior, she is deeply compassionate and protective of her students. She is often exasperated by the amount of danger students, especially Harry, get into, frequently muttering about banning Quidditch or other perilous activities. Her professionalism is matched only by her strong moral compass, as demonstrated by her willingness to stand up to figures like Dolores Umbridge and Cornelius Fudge when her patients' welfare is at stake.
Her wand type, core, and length are unknown, and she is never shown producing a Patronus Charm.