Princess Andromeda

Andromeda was the daughter of King Cepheus and Queen Cassiopeia of Ethiopia. She was chained to a rock and exposed to the Sea Monster, Cetus, as punishment for her mother's boast of beauty superior to that of the Nereids. Perseus, on his way back from his expedition against the Gorgon, saw her and fell in love with her and promised Cepheus he would free her if she could become his wife. Cepheus agreed and, with the aid of his miraculous weapons, Perseus killed the monster and married Andromeda.