Hmm... My first thought when I looked at him was actually the beast claw, but thinking about it logically I figure that it - looking at its description - is probably a unique weapon rather than a mass-produced one. It also probably wouldn't exactly help his image as a man trying to come back to civilization after spending time with the Harrow. Maybe something like the saw cleaver/spear, or the Hunter's axe? Or the beasthunter saif or beast cutter?