The Mountain Troll is a minor antagonist in Harry Potter and the Philosopher's Stone. He was let into Hogwarts School of Witchcraft and Wizardry on Hallowe'en of 1991 by Quirinus Quirrell, possessed by Tom Marvolo Riddle, in an attempt to steal the Philosopher's Stone of Nicolas Flamel.
Quirinus Quirrell was able to control this troll, a rare talent. He said later that he had a gift with trolls. He also used a troll to help protect the Philosopher's Stone.
History
Background
Personality
Role in the film
Harry Potter and the Philosopher's Stone
Other appearances
Video games
Harry Potter and the Philosopher's Stone
Harry Potter and the Order of the Phoenix
Harry Potter and the Half-Blood Prince
Lego Harry Potter: Years 1–4
Gallery
Trivia