Marceline the Vampire Queen

Marceline Abadeer, better known as Marceline the Vampire Queen, is a fictional character in the American animated Cartoon Network television series Adventure Time and resulting franchise, created by Pendleton Ward. She is voiced by Olivia Olson in most appearances, by Ava Acres as a child, and by Cloris Leachman as an older woman. Marceline is a fun-loving 1,000-year-old vampire queen, as well as a musician who plays an electric bass that she made from her family's heirloom battle-ax. Ward created the artistic design for Marceline, with small changes and additions added by Phil Rynda, the former lead character and prop designer for Adventure Time.