A type of Harpy with a beautiful singing voice that absolutely loves singing. Their songs are infused with a lot of magical energy, and men who hear them become entranced by it and end up moving in the direction that they hear the song coming from.  Most sirens live near the ocean, and due to this many ships have disappeared mid-voyage, never-to-return, after the men aboard were lured by their songs. Thus sailors are very fearful of them.