Bill cipher

Bill cypher/cipher is a demigod of chaos and knowledge, his parents are missing, he has abandonment issues and hates being alone for too long, he has one eye and floats, if you make a deal with him he takes control of your body and turns you yellow, any charms your character wears turns into his face, if you have a tail a charm of a yellow triangle will appear on the edge, dipper and mabel exist.