Yenra Marceline the Vampire Queen from Adventure Time Marceline the Vampire Queen Cosplay Photo: A woman dressed in an Adventure Time-inspired costume, specifically as Marceline the Vampire Queen. She has long black hair and is wearing a red-and-black plaid shirt with the sleeves rolled up, revealing her pale skin. Her face is painted white, and she sports a red flower crown on her head. The background of the image appears to be an outdoor setting, possibly a park or a street, with trees and greenery visible in the distance.