"I see," Sebastian said thoughtfully. He couldn't help but wonder if he would notice a difference, eating the soul of someone who had the potential to become a ghost or other supernatural creature, or someone who didn't have enough. Not that he would ever find out, most likely.

He smiled. "That's fascinating. It's not the same where I come from. There are souls of different quality, different refinement, but not different sizes, so far as I'm aware."