Well, i assume he does is a bard. Specially since he only uses dagger/throwing daggers...Just no idea why he never sung a thing...maybe his instrument is supposed to be the stolen horn that appears during missions.

Its like that monocle lalafat...we assume he is THM, but i don't remember seeing him cast a thing...maybe he actually is a stavesman (one of the classes that was removed from game but that was in alpha)...it would also explain why he has heavy armor equipped.