Pendleton Ward Shelby, Dewdrop Person Creator, Guest Voice Jeremy Shada Finn Voice John DiMaggio Jake Voice Hynden Walch Princess Bubblegum Voice Tom Kenny The Ice King Voice Steve Little Peppermint Butler, Leaf Guest Voice Alan Oppenheimer Darren the Ancient Sleeper, Sun Guest Voice Jill Talley Maja, Gridface Princess, Mother Bird Guest Voice Steve Agee Ancient Psychic Tandem War Elephant, Ant Guest Voice Keith Ferguson Col. Candy Corn, Caterpiller Guest Voice Thurop Van Orman Kent Guest Voice James Urbaniak Rat King, Leaf Beard Guest Voice Ashly Burch Blacksmith, Scorpion Guest Voice Fred Seibert Executive Producer Kelly Crews Producer Jesse Moynihan Writer Madeleine Flores Writer Adam Muto Writer