Design for my Adventure Time OC, Marilla, the Mermaid Princess. I love Adventure Time and I decided I wanted to create a character for the fun of it. I think I made her design too elaborate/detailed, but w/e; I’m happy with it. Marilla is a very curious mermaid which often tends to get her into trouble more often than not. She’s rather shy because she’s been sheltered by her father for most of her life in the Mermaid Kingdom, but still has a curiosity for the world around her.