who is marceline?
Marceline the Vampire Queen is a fictional character in the American animated Cartoon Network television series "Adventure Time"
Marceline the Vampire Queen
Marceline the Vampire Queen is a fictional character in the American animated Cartoon Network television series "Adventure Time", created by Pendleton Ward. 
who does the voice of marceline on adventure time Olivia Olson
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Marceline the Vampire Queen [SEP] Introduction
Marceline the Vampire Queen is a fictional character in the American animated Cartoon Network television series "Adventure Time", 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 old 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-axe. The artistic design for Marceline was created by Ward, with small changes and additions added by Phil Rynda, former lead character and prop designer for "Adventure Time". Marceline makes her debut in the first-season episode "Evicted!", in which she forces Finn and Jake from their home.