In Greek mythology, Medea (/mɪˈdiːə/; Ancient Greek: Μήδεια, romanized: Mḗdeia; lit. 'planner, schemer') is the daughter of King Aeëtes of Colchis. Medea is known in most stories as a sorceress, an accomplished pharmakís, a worker in pharmakeía (medicinal magic), and is often depicted as a high-priestess of the goddess Hecate. She is a mythical granddaughter of the sun god Helios and a niece of Circe, an enchantress goddess. Her mother may have been Idyia.
She first appears in Hesiod's Theogony around 700 BC, but is best known from Euripides's 5th-century BC tragedy Medea and Apollonius of Rhodes's 3rd-century BC epic Argonautica. In the myth of the Argonauts, she aids Jason in his search for the Golden Fleece. Medea later marries him, but eventually kills their children and his other bride according to some versions of her story.