Molly Weasley is the wife of Arthur Weasley and the matriarch of the Weasley family. She is the mother of seven children, including Ron Weasley, who becomes Harry Potter's best friend. Molly is born into the pure-blood Prewett family, being the sister of Gideon and Fabian Prewett. The character is first introduced in Harry Potter and the Philosopher's Stone, when she kindly tells Harry how to cross the barrier through to Platform Nine and Three-Quarters.