The Furies are the avenging goddesses in Greek mythology. They were also known as the Erinyes, the angry ones. The Romans call them the Furies or the Dirae (terrible). The three sisters were born from the blood of Ouranus who fell into the womb of Gaia when his son Cronus castrated him. The three are Alecto (the Unceasing), Megaera (the Grudging) and Tisiphone (the Avenging).
Their task was to avenge wrongly spilled blood and thus relentlessly pursued Orestes who had killed his mother for murdering his father Agamemnon. They especially avenged crimes against women.