The animated television series where Finn and Jake interact with Princess Bubblegum and a character who is technically a what?
Adventure Time:  Finn and Jake live in the post-apocalyptic Land of Ooo, where they interact with Princess Bubblegum (Hynden Walch), the Ice King (Tom Kenny), Marceline the Vampire Queen (Olivia Olson), BMO (Niki Yang), and others. Ice King:  Although technically an antagonist, he sometimes helps the main characters and is the protagonist of several episodes focusing on his struggles or backstory.
i don't know