One of the Trinity of Bal Masqué, entitled as “The Priestess.” Members of Bal Masqué refer to her as “Our Great Priestess” and Margery Daw refers to her as “Princess of Stars.” Sydonay cares for her a lot, and to her dismay, Sydonay often calls her “My Hecate.” Bel Peol always mentions turning her into an “eternal existence.” During the creation of the Great Binding Chain in ancient times, she went by the name “Nüwa.”
Her position is very important with respect to what the Bal Masqué plans to do with the Reiji Maigo, since she is the one who can take the power of Reiji Maigo and send it out to everything in Seireiden.
In contrast to her counterpart in the anime, the light novels depict Hecate as a cold and feared leader that even the entirety of Bal Masqué fears her. She has a hobby of trekking up mountain tops, yet she despises mountain climbers who litter her favorite sites, so she slaughters them on sight.
According to Sydonay, Hecate’s reason for existing is to be sacrificed to summon the Snake of the Festival (which is true as she became the sacrifice for the creation of Xanadu). She will eventually be reborn by gathering the wishes of Crimson Denizens while he is asleep and will await his next summoning. She appears when the Crimson Denizens’ wishes become great enough to summon their God, heralding his next awakening.
Hecate appears before Sydonay in a dreamlike afterlife and is surprised that he had died. He tells her that he wanted to die. They hold hands and walk towards a white light, hoping for the day the Trinity and their leader are together once more