If you go into the girls' restroom at Hogwarts, chances are, you're going to run into Moaning Myrtle. She wasn't very well-liked in life nor in death. But hey, she's willing to share her toilet with you. Dress up as this memorable Harry Potter character with this Harry Potter Moaning Myrtle Costume for girls. Now you can haunt the halls of Hogwarts all day long.