A Hogwarts ghost; she was a student who died in a bathroom because she saw a basilisk while Tom Riddle (later Voldemort) was at school. She spends most of her time in the bathroom where she died, though she does imply to Harry that she spies on male students in the Prefects' bathroom. When Harry uses the Prefects' bathroom to prepare for the second task, Myrtle shares what Cedric did to figure out the egg and guides Harry in interpreting the egg's riddle.
Moaning Myrtle Character Timeline in Harry Potter and the Goblet of Fire
The timeline below shows where the character Moaning Myrtle appears in Harry Potter and the Goblet of Fire. The colored dots and icons indicate which themes are associated with that appearance.