Demons

The Demons are a species who first appeared in "It Came from the Nightosphere." The only demon who appeared in the episode was Hunson Abadeer, who is Marceline's dad. The other Demons appeared in "Return to the Nightosphere," when Finn and Jake were exploring the Nightosphere. Most of them look completely different from one another. They look different from the traditional demon on the inside, though. Some of them are friendly, and others are very serious and strict. None are truly evil (except the wearer of the Nightosphere Amulet).

Notable Demons

 * Hunson Abadeer
 * Blood Demon
 * Nightosphere Jailer
 * The Teller
 * Transportation Demon
 * Big Demon
 * Ab Demon
 * Boat Demon
 * Line Demon
 * Weird Punishment Demon
 * Marceline (formerly)
 * Finn (formerly)

Trivia

 * They were first mentioned at Wondercon 2012.
 * Most of them were designed by Andy Ristaino.
 * The demons that appear in the Nightosphere, for some reason, appear to excrete Bananas from their bodies.