Hannah Olivia Macmillan (née Abbott) (b. 12 April 1980) was a half-blood witch and Hufflepuff student at Hogwarts School of Witchcraft and Wizardry, where she attended from 1991 to 1998. She is the eldest daughter of Jake and Daisy Abbott (née Owens) and elder sister of Johnny Abbott. During her childhood, Hannah became best friends with Susan Bones, whose parents were killed in the British Wizarding Civil War, and the two became magically bonded sisters shortly before they began Hogwarts.