Ashborn_of_Azure - Profile

Sorry for your loss

You should make him only use his claws and make the claws weapons themselves. Like his hands are weapons kinda like how in bleach aizens and ichigos zanpukto fused with their arms/hands except in this case it’s his natural claws instead of a sword. And if you go this route you can also go the martial art route as well since he would be a hand to hand combatint similar to how killua fights.

Do shadow fruit and you can combine it with either Sunnless powers from shadow slave and or shadow monarch powers. And since shadows and darkness are similar you can also give him the darkness fruit with it