Hermione Jean Weasley ( b. 19 September, 1979) was the daughter of Muggles Mr. and Mrs. Granger, both dentists in Muggle London. At age eleven, Hermione learned that she was a witch and had been accepted into Hogwarts School of Witchcraft and Wizardry. She began attending the school on 1 September, 1991 where she was subsequently sorted into Gryffindor House. She possessed a brilliant academic mind and proved to be a gifted student. She is very studious and bookish. She was one of the few people who was less intimidated by calling Lord Voldemort by his name like Harry, instead of calling him You-Know-Who like many others.

Hermione first met Harry Potter and Ron Weasley aboard the Hogwarts Express. Both boys found Hermione unfriendly and a know-it-all. Later her eagerness to please her professors and her constantly correct answers reinforced their initial impression. However, in spite of the cool relationship between the three, Hermione stepped in to take the blame from Ron and Harry after they had saved her from a troll on Halloween. Harry and Ron were surprised but grateful, and the three quickly became friends. In her second year, Hermione fell victim to a basilisk unleashed upon Hogwarts following the opening of the Chamber of Secrets but was returned from her petrification under the care of Madam Pomfrey with the assistance of Professor Sprout's Mandrake Restorative Draught. The following year, Hermione was granted permission to use, and was sent, a Time-Turner from the Ministry of Magic to facilitate her volition to study far more subjects than was possible without time travel. Later in the year, she and Harry would use the Time-Turner to rescue Sirius Black from the Dementor's Kiss as well as Buckbeak the Hippogriff from execution. During her fourth year at Hogwarts, Hermione became an advocate for the better treatment of house-elves, forming the association S.P.E.W. In her fifth year, she was the driving force behind the creation of Dumbledore's Army. Later in her fifth year she fought in the Battle of the Department of Mysteries. In her sixth year she fought in the Battle of the Astronomy Tower and, at the beginning of what would be her seventh year, the Battle of the Seven Potters in 1997. Hermione, as well as Ron - with whom she had become romantically involved - decided not to return to Hogwarts for their final year of studies and instead chose to accompany Harry on his quest to find and destroy Lord Voldemort's Horcruxes. She then fought in, and survived, the Battle of Hogwarts.

Following the Second Wizarding War, Hermione went back to Hogwarts to complete her education at Hogwarts. Later she found employment with the Ministry of Magic, furthering the cause for the better treatment of house-elves, before being promoted to the Department of Magical Law Enforcement. She eventually married Ron Weasley, and together they have two children: a daughter, Rose, and a son, Hugo. Hermione became the godmother of Harry and Ginny Potter's eldest son James.