#124 - Habitable Zone - in A Cabin In The Woods
Charby absolutely can eat regular food without ill effect, but it's empty calories. Sapping blood from fae creatures is like straight up drinking corn syrup. Humans also don't tend to be able to fight back against a vampire the way creatures that live in the greater part of Kellwood do. Well, most of them anyway!
This is actually a simplified part of the official map I made for Kellwood! I'm not done detailing it, and the file is already absolutely massive.