Medusa
Medusa was one of three sisters, the Gorgons. Medusa's sisters were Stheno and Euryale. Medusa was mortal, but her sisters were immortal. They were all children of the sea gods, Phorkys and his sister Keto. Before they were monsters, all three sisters were beautiful young women, Medusa the most; however, she was a priestess in the temple of Athena and was bound by a vow of celibacy.