Well Aki, my idea was [i]sorta[/i] sirenish...but since clover ask, i'll just say it (oh, thanks for the warm welcome, by the way ^.^)
My idea was of Merlfolk, shapeshifting merlfolk. I would use him as a freakshow/magician, being able to manipulate and even "create" (emulate i think would be better) sea life to use in his artsy performances...he would have the alluring personality of a siren, but not that seductive...more like bedazzling...still trying to figure out why/how he got in the circus and how he kills his eventual victims (the idea of a lamprey pleases me greatly - sea vampires, aaaw yeah)