Marceline, the Vampire Queen is a half-demon/half-vampire who is over a millennium old. During Finn and Jake's first encounters with her, she requests that they leave wherever they are as long as the areas belong to her. Though initially an enemy to them, she quickly becomes one of Finn and Jake's closest friends. Her father is the demon who rules the Nightosphere. This is the FIRST APPEARANCE of this character in premium digital format. This series is available in the China region. Adventure Time and all related characters and elements as well as all other Cartoon Network characters and related elements are trademarks of and © Cartoon Network.