Dukeham is one of the 4 Leaders of Tusk and a rather mysterious fellow. Like the other members of Tusk he wears a mask, covering his entire face. He led the attack on Ulvarx. From what we have seen, he is a very formidable Shard Caster, easily disposing of Ginga, whom he shares a past with. Dukeham was Ginga's Captain, and Ginga thought that he had killed his beloved Karen, which was a misunderstanding. Ginga also notes that Dukeham was known for caring deeply about those that served him, and Ginga respected him greatly for that.