Filtiarn used to be a normal wolf that lived in the forest of Silvast. He, like all the other animals in Silvast, had close bonds with the humans, not fearing them and helping them out when they were needed. Eventually he became the leader of his pack. When Amnesty gained control over Silvast, he and Aquila were chosen to become her "pets". Amnesty used her magic to make Filtiarn grow until he was large enough to carry her on his back. Amnesty and Filtiarn have shared a very close bond ever since.