Sirena Von Boo is a Monster High doll, released in 2014. She is a hybrid, the child of a mermaid and a ghost. She has her own stand-up mermaid tail, navy curly hair, and fins on her arms. The doll is currently wearing a green tank top.

Sirena Von Boo as a doll always impressed me with the sheer amount of detail that was put into the texture of her plastic mermaid tail and her fringe armsleeves. We were very gentle when we played with her because of that, we would never put our dolls in water certainly not her either (even though she is a mermaid).