Marceline was a Vampire. She lives with her bespren. She thought that she became a Vampire because of a Vampire who bite her. She never knew that she really has the Blood of a Vampire. So she spend her whole life finding the Vampire who bite her. She come to school every night because she was at the night class. She cant stay under the sun because her skin was burning when she does but she use Black umbrella when its important. She hide the truth that she was a Vampire so that people wouldn't be scared at her except her BestPren Misaki She Trust her more than anyone.