Troll- in the dungeon - thought you ought to know.
~ Quirinus Quirrel on the troll

The Mountain Troll is a massive beast that made a short appearance as a supporting antagonist in Harry Potter and the Philosopher's Stone.

This troll's race named mountain trolls (Troglodytarum alpinum), who being largest, weight over a ton, and the most vicious kind of their species. They are often depicted as bald and pale-grey. They sometimes use Graphorns as mounts, which results in scars due to the Graphorns not liking it.


Tricked by Quirrell and Defeat

The Troll was lured into Hogwarts by Professor Quirrell who claimed that the Troll was in the dungeons, but this was just a lie as the troll now already roaming in the girl's bathroom, where he found and attempted to kill Hermione. Harry Potter and Ron Weasley came to the rescue and succeeded to beat the troll unconscious, though not without various difficulties: The troll completely ignore them due to its stupidity and too focus in attempt murder on Hermione.

This prompt Harry to jumped on its back and having his wand stuck in one of his nostrils. This, of course, caused the troll snapped and angrier than ever. He grabbed Harry by his mercy and tries to smack the boy with his club. Like the previous attempts to kill Hermione, the troll was distracted so much that he unaware that Ron uses levitation spell to take his club away with Hermione's help. When the troll realized it, it was too late as Ron led the club to fall onto his head, instantly knocked him into submission.

Motivation Behind Troll Incident Revealed

What happened to the troll after this incident is unknown, though it is likely the troll was killed off or it had escaped. Whichever way, the Troll is never seen again. Except that it is hinted in the later books that the troll was returned to the mountains. Later Quirrell reveals to Harry that he was the one who released the troll and why he did it. 


           HarryPotter Villains

Death Eaters
Lord Voldemort | Severus Snape | Draco Malfoy | Lucius Malfoy | Peter Pettigrew | Barty Crouch Jr. | Bellatrix Lestrange | Corban Yaxley | Alecto Carrow | Antonin Dolohov | Augustus Rookwood | Walden Macnair | Thorfinn Rowle | Evan Rosier | Cedric Diggory | Fenrir Greyback | Stan Shunpike

Death Eater Supporters
Quirinus Quirrell | Dolores Umbridge | Snatchers (Scabior) | Gregory Goyle | Vincent Crabbe | John Dawlish | Kreacher

Muggle-Born Registration Commission
Dolores Umbridge | Corban Yaxley | Albert Runcorn | Mafalda Hopkirk

Gellert Grindelwald's Alliance
Gellert Grindelwald | Credence Barebone | Vinda Rosier | Queenie Goldstein | Gunnar Grimmson | Abernathy | Krall | Carrow | Nagel | Krafft | MacDuff

Other Dark Wizards & Witches
Salazar Slytherin | Morfin Gaunt | Marvolo Gaunt | Merope Gaunt | Gilderoy Lockhart | Cornelius Fudge | Herpo the Foul | Merwyn the Malicious | Ekrizdis | Delphini | R | Patricia Rakepick | Merula Snyde | Ismelda Murk | Emily Tyler | Erika Rath

New Salem Philanthropic Society
Mary Lou Barebone | Credence Barebone

Basilisk | Acromantula (Aragog & Acromantula Colony) | Dementors | Centaurs | Giants | Inferi | Nagini | Mountain Troll | Gnarlak

Tales of Beedle the Bard
Charlatan | Death | Warlock

Marge Dursley

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