Gorgons in the context of "Perseus"

In Greek mythology, Medusa (/mɪˈdjuːzə, -sə/; Ancient Greek: Μέδουσα, romanized: Médousa, lit. 'guardian, protectress'), also called Gorgo (Ancient Greek: Γοργώ) or the Gorgon, was one of the three Gorgons. Medusa is generally described as a woman with living snakes in place of hair; her appearance was so hideous that anyone who looked upon her was turned to stone. Medusa and her Gorgon sisters Euryale and Stheno were usually described as daughters of Phorcys and Ceto; of the three, only Medusa was mortal.

Medusa was beheaded by the Greek hero Perseus, who then used her head, which retained its ability to turn onlookers to stone, as a weapon until he gave it to the goddess Athena to place on her shield. In classical antiquity, the image of the head of Medusa appeared in the evil-averting device known as the Gorgoneion.

In Greek mythology, the Graeae (/ˈɡriːiː/; Ancient Greek: Γραῖαι Graiai, lit. 'old women', alternatively spelled Graiai), also called the Grey Sisters and the Phorcides ('daughters of Phorcys'), were three sisters who had gray hair from their birth and shared one eye and one tooth among them. They were the daughters of the primordial sea gods Phorcys and Ceto and, among others, sisters of the Gorgons. Their names were Deino (Δεινώ), Pemphredo (Πεμφρηδώ), and Enyo (Ἐνυώ; not to be confused with the war goddess, Enyo). The Graeae are best known from their encounter with Perseus, who, after capturing their eye, forced them to reveal information about the Gorgons.