In book 3, Tanu and Coulter see a mysterious creature near the Nipsies domain. They guessed it was a Hermit Troll, the smallest of the trolls. It was only about 3 feet tall moving close to the ground. It ended up being just that, only infected by Ephira and Kurisock's shadow plague. In book 4, a hermit troll named Bubda had taken up residence in the magic knapsack Kendra used to escape from Torina Barker, the Lectoblix.