Why on earth would anyone *want* to be a Harpy?
Harpy, a definition: a rapacious monster described as having a woman's head and body and a bird's wings and claws or depicted as a bird of prey with a woman's face.
a grasping, unpleasant woman.

Yeah, no thanks..

Of course there are alternatives...for example the Featherfolk from Roak in Star Ocean 4.