Nemesis (Νέμεσις) also known as Rhamnousia/Rhamnusia is the Greek goddess of revenge and balance.
In some myths Nemesis is the daughter of Oceanus, the sea Titan, yet in others she appears as the daughter of Nyx (personification of night), created from Chaos, the mass of energy at the beginning of time. She appears chiefly as the avenger of crime and the punisher of hubris. Her name in Greek means "to give what is due" therefore giving her the nickname, Justice.
Nemesis is a cold hearted goddess, and isn't afraid to do radical exchanges with her own children, such as blinding Ethan in one eye so he will receive power in return. However "Nemesis always pays her Debts, good or evil" says one of her children.
The children of Nemesis are said to always get their revenge, and whenever they are struck in battle they become stronger. They are great in close combat, and most have anger problems. They can also cause good and bad luck.