Hecate

Hecate ('Εκάτη in Ancient Greek) is the daughter of the Titans Perses and Asteria. She is the goddess of magic, crossroads, trivial knowledge, sorcery, witchcraft, necromancy, and a moon goddess, basically the darker side of it or the Harvest Moon although she was associated with many things including childbirth, nurturing the young, gates and walls and doorways and sometimes even change. She's said to be the godness among the gods. She can stay in heaven, at the deep sea, at the underworld and also at earth. Her Roman Counterpart is Trivia.

History
Hecate was the Titan goddess of magic among many other things. Born to Perses and Asteria, Hecate was among the few Titans who supported Zeus and the Olympians in the Titanomachy and thus was allowed to retain her authority once the Olympians came into power. For her support, Zeus gave Hecate a share in all three realms of the cosmos for which she was known as the goddess of crossroads.

Hecate had little organized worship as she was more commonly found on the outskirts of the old myths than playing an active part in it. However, Hecate did play a major role in the abduction of Persephone. After her daughter's abduction, it was Hecate who told the frantic Demeter what had become of her daughter. After the dispute between her mother and husband was settled, Hecate became Persephone's confidante when she was in the Underworld. Thankful for their friendship, Hades honored Hecate as a prominent and permanent guest in the Underworld.

She also participated in the first Giant War, seen immolating a giant named Clytius, with her torches.

Devotion to Hecate was especially favored by the Byzantines for her aid in having protected from the incursions of Philip of Macedon. Her symbols were the crescent and star, and the walls of her city were her provenance.

The Sea of Monsters
Hecate isn't shown, but is mentioned to be the mother of Circe.

The Battle of the Labyrinth
Hecate doesn't appear but it is mentioned by Dionysus that she has gone over to Kronos' side. She also sends some of her empousai Kelli and Tammi to attack Percy.

The Last Olympian
It is mentioned that Hecate used her magic to cloak New York City and prevent mortals from entering or leaving. She also sends magical lights towards Mount Olympus, though the nature of these lights are unknown as the wards of Olympus repel them quickly.

At the end of the book, Hecate's cabin at Camp Half-Blood is under construction, along with those of many other minor gods. Her cabin is made of magical stones that, if dropped, would either explode or turn everyone within a half mile radius into a tree.

The Lost Hero
In The Lost Hero, it is revealed that Hecate is the mother of Lou Ellen.

Personality
A lover of solitude, Hecate's true nature is very much unknown. She spends a deal of time in the Underworld, being a close friend of Hades and Persephone especially. She apparently resented not being honored by the demigods since she supported Kronos in The Second Titan War. Since her children have been given their own place at Camp Half-Blood, she has given up her grudge against Olympus.

Appearance
Hecate does not appear in the series but she is usually depicted in paintings as a beautiful woman holding twin torches, dressed sometimes in a maiden's skirt and hunting boots much like her cousin, Artemis. In statuary Hecate was often depicted with three faces as the goddess of crossroads and even with three different forms one for morning and other two for evening and night.

Hecate is amongst the goddesses featured in the symbol of the triple goddess: In Greek mythology, there are many goddesses associated with the moon. These include Selene, the personification of the moon itself, Artemis, the goddess of the hunt, and Hecate, the goddess of witchcraft.
 * The Maiden-waxing moon-Artemis, represents the huntress on earth
 * The Mother-full moon-Selene, represents the moon in the heavens
 * The Crone-waning moon-Hecate, represents the underworld

Together Artemis, Selene and Hecate embody the phases of the moon. Many depictions of Selene show her wearing a crescent moon, and one of Hecate's symbols includes the dark circle of the new moon.

At the same time she was also the part of Queen of Heaven Trinity:
 * The Maiden-Hebe
 * The Mother-Hera
 * The Crone-Hecate

Many a times she is the part of the Queen of Heaven Trinity as she got a share of heaven, and as a crone because she also rules over Underworld.

Art sometimes depicts Hecate with the faces of animals as well as humans and she is also sometimes shown in her dog´s company. In addition, she was also depicted as an elderly woman; the classic stereotype for witches.

Trivia (Roman Goddess)
Hecate can change into her Roman counterpart of Trivia. As Trivia, she becomes more disciplined, militaristic and warlike. While Greeks envisioned her as powerful and mysterious being, for the Romans she was the 'Queen of Ghosts' because of her role of guarding the borders between the human world and the realm of the dead. She may have children or descendants at Camp Jupiter near San Francisco.

Abilities
Hecate is seen during The Last Olympian using her magic to try and attack Olympus, however her magic isn't strong enough to break through the defenses.

Trivia

 * Despite her children in the book series, Hecate was a virgin goddess in most stories, although her children may have been conceived in a unique way.
 * Trivia refers to obscure knowledge which Hecate/Trivia presided over.
 * Dogs are Hecate's sacred animal.
 * She is symbolized by twin torches, keys, three crossroads, potion bottles, and cauldrons.
 * Her name means "will" but at the same time, if we consider her name's spelling and pronunciation, it means "her that operates from afar", "her that removes or drives of," "the far reaching one" or "the far darter".
 * According to the Roman Mythology, her Roman counterpart, Trivia, used to kidnap young maidens, whom she later changed into Nymphs.