Bill Cipher is a character and the main antagonist of the Disney Channel franchise Gravity Falls. The character is voiced by the show's creator, Alex Hirsch. He is a "dream demon" who can be summoned and released into anyone's mind. Bill first appears in "Dream Escapers."

Alastor, also known as the Radio Demon (RD) or the Radio Demon (RD), is a sinful demon and one of the powerful Overlords of Hell. He is one of the main protagonists of Hazbin Hotel.