This is a human version of Marceline.
Eventhough she looks more peacefull and cuter, idk, just wanted to see how it would turn out.
I was thinking, as she's a vampire, she most have suffered while transforming (because she has bite marks although she did not have a bite mark on her neck when she was younger.) and adding to it, being a 'teen' vampire, dealing with childhood memories, douchie boyfriends, her father eating her fries which damages their relationship and the aftermath of the Mushroom War, made her as she is today, -always protecting herself, being in a 'defense mode', not letting people get to much of her- but she also has that kind and good side of hers.
So I pictured her this way. A gentle and delicate queen if she never had to pass through all those things.
For my dear friend who is a mermaid tail-red haired-humanoid-bunny-
Sketches here: [link]