 They later take many different forms over the course of the series, and the "three women" symbol remains an extremely common one, often blurring the lines between when characters are supposed to be merely themselves and when they are supposed to be representations of the Three.The Three represent the female principle, prophecy, and mystery, and they are often a vaguely menacing and enigmatic presence in the series.Incarnations of the Three include the Erinyes (Furies) in their vengeful aspect and the Moirai (Fates) or Weird Sisters in their divinatory aspect.