Medusa

Medusa is a Primordial goddess and the youngest of the three Gorgon sisters. During the extermination of the Primordial Gods by the Olympians, Medusa was hunted by and raped by Poseidon and Athena before she escaped with the help of Stheno and Euryale. She was later hunted and killed by the angel Perseus.

History
Medusa is the youngest of three sisters born to Ceto and Phorcys. She lived with her sisters on an island near Crete where the three built a substantial temple. Once the Olympians started hunting the primordial gods, Stheno and Euryale transformed the temple into a make-shift fortress to protect themselves. The fortress was flawed however and Poseidon and Athena managed to breach the Temple while Stheno and Euryale were out fishing in the sea. Poseidon was enchanted by Medusa's beauty and thought to take advantage of her before killing her. Athena was delighted to watch as Poseidon raped Medusa. While in the act, Euryale had returned and witnessed Poseidon violating her sister. In a furious rage she attacked Poseidon and managed to run him and Athena off. Stheno returned and they decided they needed to keep moving around to protect each other from the Olympians.

The three moved from place to place but only lived in each for short periods of time. They always stayed near the sea, however, to keep in contact with their mother Ceto who rarely visited land. During this constant movement, Medusa wondered if they should ally themselves with the Demons or the Succubi and fight back against the Olympians. Stheno thought that those races were ultimately no better than the Olympians and was confident they could survive on their own.

Discovery by Perseus
Their decision to remain close to the sea during their hiding turned out to be their undoing as rumor of the sisters favorite locations spread. Eventually Perseus, an Olympian angel, half-god, half-human, discovered their location. Perseus was able to sneak past Stheno and Euryale while they were sleeping and fought and killed Medusa, taking her head to Athena to be siphoned of chaos energy. Stheno and Euryale became aware of the fighting but by the time they arrived to help Medusa, it was too late. They found her dead with her head removed.