Leanne is a fictional character of J.K. Rowling's Harry Potter series.She is a Gryffindor student, very friend of Katie Bell. In the sixth book, they are walking returning to Hogwarts from Hogsmeade when Katie Bell is injured and cursed by the necklace of Borgin and Burkes. She tells Harry Potter, Hermione Granger, Rubeus Hagrid and Minerva McGonagall how Katie returned with the item from The Three Broomsticks' Toilet .