Hecate or Hekat, originally a goddess of the wilderness and childbirth--- is a liminal woman, defying definition, not part of the original Greek pantheon. Hesiod says she's another incarnation of a moon goddess. Two versions appear later in Greek mythology: an avenging woman, similar to Nemesis, and "The Queen of Ghosts" because her image was placed in triplicate at three-way crossroads, guarding the borders between the living and the dead.
However, like many women during the Medieval period she developed a very bad reputation among Christians. She became a witch, a bitch, attended by dogs, bats and the devil. A woman to be feared, often compared to Lilith and the Whore of Babylon. Now said to haunt graveyards by the light of a full moon, but once upon a time, she says, I was your mother.