Brilliant Moaning Myrtle
Brilliant Prefects' Bathroom
Prefects' Bathroom, Hogwarts Castle
Known not-so-affectionately by Hogwarts students as Moaning Myrtle, Myrtle Warren primarily haunts the second-floor girls' lavatory. Many know the story of her untimely death and of her complete disregard for personal privacy, but few know the key role her peeping played in Harry Potter solving the puzzle of the Golden Egg during the 1994 Triwizard Tournament. A noted Potter fan, she would go on to help him locate the Merpeople's village in the second task.