Bill Cypher is one of the most powerful demons in all dimensions. He has his own estate in the demon world, where he has many servants and subordinates. after his defeat, he became really weak. He was obsessed with the idea of revenge on the Pines. He is chaotic and manipulative. At first, he always pretends to be good in order to win over anyone, and then use him for his own purposes. jealous, protective, if it's really someone important to him.