Moaning Myrtle

Moaning Myrtle’s final resting place is in the first-floor girl’s bathroom above the Great Hall. Myrtle was a Ravenclaw student who was killed by Slytherin’s Basilisk under the order of Tom Riddle (AKA Voldemort). Myrtle haunts the toilet and frequently floods it with her emotional outbursts. It’s described as “gloomy, with cracked and spotty mirrors, and chipped stone sinks.” Due to Myrtle’s depressing presence, girls attending Hogwarts only go in there when absolutely necessary.