Keith is a monster with the ability to warp realities and transform into anything. Keith's goal was to make Marco his slave. But in the end, it turns out he is a normal human-like monster who wishes not to be seen by Marco.
Keith looks like a yellow blob of human organs connected by webs of purple veins in Marco's dream. But, he really looks like a normal boy.
He had the power to go into Marco's dreams and change his mind.
- Keith is one of the few villains who does not fail.