Peeves was a poltergeist at Hogwarts School of Witchcraft and Wizardry, since c. 993. Fond of mischief and chaos, he was a constant pain to the school and its inhabitants, especially Argus Filch, the caretaker, as the only ones able to control him were the Bloody Baron and Albus Dumbledore.
In 1995, Peeves, along with most of the Hogwarts residents, opposed Dolores Umbridge, the High Inquisitor, and pranked her until she was kicked out of the school at the end of the school year. In 1998, Peeves fought at the Battle of Hogwarts against Lord Voldemort and his Death Eaters. After the Second Wizarding War, Peeves continued making trouble at Hogwarts.