A hero (from Greek ἥρως hērōs), in Greek mythology and folklore, was originally a demigod, the offspring of a mortal and a deity, their cult being one of the most distinctive features of ancient Greek religion.
Later, hero (male) and heroine (female) came to refer to characters (fictional or historical) that, in the face of danger and adversity or from a position of weakness, display courage and the will for self-sacrifice – that is, heroism – for some greater good, originally of martial courage or excellence but extended to more general moral excellence.
Stories of heroism may serve as moral examples. In classical antiquity, hero cults – veneration of deified heroes such as Heracles, Perseus, and Achilles – played an important role in Ancient Greek religion. Politicians, ancient and modern, have employed hero worship for their own apotheosis (i.e., cult of personality).