Sea goddess Medusa

In Greek mythology, Medusa is a Gorgon, the daughter of the sea deities Phorkys and Keto, as well as the sisters Stheno and Euryale, all three of whom live beyond the sea. She is the only one of the three Gorgons who has a mortal nature. The goddess of Athens transformed her into a terrible figure with snake hair. Anyone who looks at her turns to stone.