Fontaine

The grumpiest child of them all. He's tiny and precious and will sit on you angrily if you tell him he's cute.

Fontaine is one of the few creatures who was born with the freedom to walk between worlds. He can't access the Boneyard itself, not the part Bones resides in, but can go where he pleases when he pleases. Fontaine's motives and desires are a mystery; he seems to simply be interested in watching how things go, and has worked to be able fit into each world seamlessly when he chooses to visit it. For the most part, he maintains a small mansion in World 2, where he lives in seclusion.