Ellsworth, a black-eyed demon, is seen as the counterpart of Bobby Singer. This demon works for Crowley and organizes other demons on the capture of different monsters for information on Purgatory. Ellsworth also masquerades as a superior from FBI, much like how Bobby does. Aside from using conventional phone calls, he was also seen to utilize multiple Goblets of Blood. He presumably possesses the abilities of other regular black-eyed demons.
In a flashback from The Man Who Would Be King, Sam and Dean try to uncover why demons are so interested in capturing monsters. The Winchesters find out from another demon that a demon named Ellsworth not only organizes monster hunts, but also knew Crowley's location. Castiel, wanting to prevent the hunters from knowing the connection him and between the King of Hell, goes ahead of them so he can clean the place out before they arrive. This way, the Winchesters could never get to Crowley. Upon seeing the angel storm his base of operations and smite his fellow demons, Ellsworth tried to escape his vessel, but was forced back by Castiel and eventually killed.
- Ellsworth is a tribute to Jim Beaver's character on Deadwood.