The Trolls are the major characters from the franchise, Tales of Arcadia.
Trolls used to be unwanted during the medieval times and they are even placed in prisons, but they got freed by the main characters. Later, they are starting to be friends with humans. When evil trolls started the war, the good trolls joined the humans to fight the evil trolls and the evil trolls lost the war.
During the modern times, trolls live in the Troll Market, which is under the city. Jim Lake Jr. later become the TrollHunter, who will protect the good trolls by hunting evil trolls.
Trolls vary in their appearance depending on their race. They are generally humanoid creatures made of rocks. They have koala-like noses, horns and carving-like tattoos.
There are some trolls with six eyes and four arms, like Blinky Galadrigal and his brother Dictacious.