Adventure Time follows the adventures of a boy, Finn the Human, and his best friend and adoptive brother Jake the Dog, who has magical powers to change shape and to change size at will. The show's creator Pendleton Ward describes Finn as a "fiery little kid with strong morals"; Jake is based on Bill Murray's character in Meatballs, Tripper Harrison. Finn and Jake live in the post-apocalyptic Land of Ooo, where they interact with the show's other main characters: Princess Bubblegum (voiced by Hynden Walch), the sovereign of the Candy Kingdom; the Ice King (voiced by Tom Kenny), a menacing but largely misunderstood ice wizard; and Marceline the Vampire Queen (voiced by Olivia Olson), a thousand-year-old vampire and rock music enthusiast.