Mrs. Norris

Mrs. Norris is a fictional cat from the Harry Potter series by J.K. Rowling. Mrs. Norris belongs to Filch, who takes cruel pleasure in punishing students whenever possible. Mrs. Norris aids Filch in catching students, and stalks around corridors, searching for students where they should not be.

It is said that many students' dearest ambition is to kick Mrs. Norris. In Harry Potter and the Chamber of Secrets, Mrs. Norris is petrified by a basilisk, leaving Filch devastated. She is back to normal, though, after a potion is prepared to unpetrify the basilisk's victims.