The Medicine Seller wasn't a particularly vengeful sort, but he would be lying if there weren't times where he left people to the mercy of the Mononoke they had created. While Arthur was not so twisted a creature, he could hardly begrudge his lover that satisfaction.

"Does someone like Dutch have the capacity for regret? I have met many people capable of awful things and they have never known even a twinge of it."

At least not until the consequences of their actions returned to, quite literally, bite them.