Rhea - (a.k.a. Cybele) Goddess of nature.
Selene - (a.k.a. Luna) Goddess of the Moon and the 'mother' of vampires.
Sterope - (a.k.a. Asterope) One of the seven Pleiades, who bore a child of Ares.
Styx - A Naiad who was the first to aid Zeus in the Titan war. (Not to be confused with the river Styx).