Mermaid

A fish type monster that lives in the ocean. Also called “ningyo.” They have one of the most gentle dispositions of all of the monsters. They almost never aggressively attack humans. Most of them are hopeless romantics, and they're always waiting for the man who will become their husband. They appear at beaches and on top of reefs, and dreaming of their yet unseen “princes,” they sing in a beautiful voice. Their singing voices contain magical power, and men who hear their songs are completely charmed.