Magical creatures in Harry Potter harbor an attraction to imagery morbid and melancholy. Ghosts are very sensitive about their condition: when the Ministry initially classified them as sentient creatures with full legal rights, they claimed that the term was insensitive and received a separate "Spirit Division", apparently to control the activities and haunting locations of troublesome ghosts (as when Myrtle was forced to haunt the place of her death (Hogwarts) after she had disrupted the wedding of the brother of Olive Hornby, a girl who had teased her at school). Named Ghost characters: Peeves, the Hogwarts poltergeist, is not considered a ghost, but an "indestructible
Hogwarts staff and later fired. However, Professor Trelawney continues to reside in Hogwarts castle due to an order by Dumbledore, who believes that she would be in danger outside Hogwarts due to the prophecy she made during her interview. Dumbledore later reveals that the prophecy is why he keeps her employed as a Divination teacher. Professor Trelawney returns to teaching in "Half-Blood Prince", but has to share classes with Firenze, as he was cast out by his fellow centaurs when he agreed to replace Professor Trelawney after she was fired, which she thinks is an outrage. In "Harry Potter and the Deathly