I wouldn't mind a really cool rogue / assassin from Outworld.
With the amount of betrayal and intrigues in their realm, one would assume that there would be guns for fire, who use magic to get in and out fast and stab their opponents with poisoned daggers to death.
He would be wearing something like a super dark poncho with chains and skulls as details. He would have a hoodie with red eyes staring out of it. He would be throwing explosive flasks, daggers, teleport around through shadows and his fatality could be him taking off the hood to showcase a monstrous head with sharp teeth, which could grow in size to bite the opponents limbs off.