Hermione Jean Granger (b. 19 September, 1979) was the only daughter of Muggle Mr and Mrs Granger, both dentists in 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 was very studious and bookish. Along with Harry Potter and a few others, she was relatively little intimidated by Lord Voldemort's name, calling him by his name, instead of You-Know-Who or He-Who-Must-Not-Be-Named.

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 Hallowe'en. Harry and Ron were surprised but grateful, and the three quickly became friends.

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 had two children: a daughter, Rose, and a son, Hugo. Hermione became the godmother of Harry and Ginny Potter's eldest son James.