Greek heroes were characterized by having one immortal parent, being born into royalty, and experiencing unusual conceptions or births. They were often favored by the gods and the subject of prophecies. As youths, they displayed amazing feats of strength. As adults, they went on quests to defeat monsters, traveled to the underworld, married princesses, and died ignoble deaths despite their gifts, highlighting their humanity. Their flaws and deaths ensured their stories would be remembered for generations.