Nemesis (Roman Equivalent: Rivalitas or Invidia) is the minor goddess of revenge and retribution. Nemesis is the daughter of Nyx, the primordial goddess of the night. She appears chiefly as the avenger of crime and the punisher of hubris (pride). For this reason she is mentioned along with Aeschyne, the goddess of modesty and shame. Her name in Greek means "to give what is due" therefore giving her the nickname: Justice.
Nemesis was the goddess of indignation against, and retribution for, evil deeds and undeserved good fortune. She was a personification of the resentment aroused in men by those who committed crimes with apparent impunity, or who had inordinate good fortune. Nemesis directed human affairs in such a way as to maintain equilibrium. Her name means she who distributes or deals out. Happiness and unhappiness were measured out by her, care being taken that happiness was not too frequent or too excessive. If this happened, Nemesis could bring about losses and suffering. As one who checked extravagant favours by Tyche (Fortune), Nemesis was regarded as an avenging or punishing divinity.
Although a respected goddess, Nemesis had brought much sorrow to mortals like Echo and Narcissus. Narcissus was a very beautiful and arrogant hunter from the territory of Thespiae and Boeotia who disdained the ones who loved him. Nemesis lured him to a pool where he saw his own reflection in the water and fell in love with it, not realizing it was only an image. He was unable to leave the beauty of his reflection and he eventually died. Nemesis believed that no one should ever have too much good, and she had always cursed those who were blessed with countless gifts.