Boggard in exile
This frog-like humanoid was found in a swampy area of the western Nalmarches along with his Slurk. Knowing only a few words in the Common tongue, this creature acted in a mostly friendly manner, and told what they could understand about his plight. From your interpretation, it seems that Garuum is outcast from his tribe, a result of some kind of dispute with the current leader of his people. It seems Garuum wishes to become leader, but was overcome by his rival and was cast out.
He indicated that his tribe lives further west, in the Hooktongue Slough. The decision to aid him in his bid for coming to power amongst his people or dealing with him in another manner has yet to be decided.