I love Greek mythology to death. Another of my favorite mythological beings is/are the Furies, eventually restricted to three by the names of Alecto, Megaera, and Tisiphone. Eumenides, Erinyes, the Kindly Ones, the Furiae. Too often portrayed as beautiful yet vengeful, I wanted to go all out with the vengeful part. Anger, enough to distort features to the point where there's no chance they could be pretty.