Hecate

Hecate is the daughter of the Titans Perses and Asteria. She is the Greek goddess of magic, sorcery, witchcraft, crossroads, trivial knowledge, and necromancy. She is also represents the dark side of the moon or the Harvest Moon. She is also associated with many things including childbirth, nurturing the young, gates, walls, doorways, and sometimes even change. She can stay on Olympus, in the deep sea, in the Underworld, and also on Earth.

Roman Counterpart - Trivia
Trivia in Roman mythology was the goddess who "haunted crossroads, graveyards, and was the goddess of sorcery and witchcraft, she wandered about at night and was seen only by the barking of dogs who told of her approach." She was the equivalent of the Greek goddess Hecate, the goddess of witchcraft, the three-way crossroads and the harvest moon. She was an underworld Titan-goddess who assisted Jove in the Titanomachy and was therefore able to keep her powers. She was a friend of Ceres and helped her to find her daughter Proserpina. As a part of her role as an underworld goddess, she was known as the Queen of Ghosts. Although she helped Ceres to find her daughter, she was also known to steal young maidens to assist her in her powers. These women later became nymphs.