Hermione attempts to pose as Millicent in order to covertly collect information from Draco Malfoy in the Slytherin common room. Hermione prepares some Polyjuice Potion using a hair she she found on her robes after the Dueling Club wrestling match, assuming it was one of Millicent's, in order to take on Millicent's appearance. As it turns out, the hair was from Millicent's cat, and thus Hermione takes on the appearance of the cat instead.