Troll (Frozen)

Trolls are a fictional sapient species seen in the Frozen franchise.

Description
The Trolls are small rocklike creatures living in the Valley of the Living Rocks in the Northern country of Arendelle; their leader is an elderly troll called Grand Pabbie. They have the ability of rolling themselves up to look like ordinary stones, thus disguising themselves from unwanted visitors, and they wear magical crystal that channel the magic of boreal aurors, allowing them to work great magic. Although somwhat wary of humans, they can become loyal allies to specific people if they get to know them, as seen with Kristoff, a man who was practically raised by them.