Prompt 3: Hecate
Otherworldly and mysterious, Hecate is best known for her association with magic, ghosts, and the night. If you hear the baying of hounds in the dark, she's likely near as they were ever at her side. She is traditionally depicted as bearing two torches to light her way or as a triple goddess of the crossroads. In mythology she is known for helping Demeter search for her daughter Persephone, a theme that ties her even more to the Underworld and spirits she is associated with. Today she is often considered a representative of those liminal places where reality bends and all manner of events may unfold...

For this prompt, I'm self-reccing a Forever Knight fic I wrote for Yuletide in 2016, "The Father, the Son, and the Unholy Ghost", which was a treat for astolat.

True, the "ghost" of the title is not a real ghost: it's Divia, the evil-seed vampire daughter of Nick's master, LaCroix, who turns her own father into a vampire in the flashback to the episode "A More Permanent Hell" and then returns from the grave in "Ashes to Ashes" to avenge his killing her when she proposed incest. "Ashes to Ashes" ends with Nick saving LaCroix from Divia by beheading her. All that does seems consistent with the Hecate prompt.

I have to admit that Divia was never a favourite of mine. She seemed pretty one-paced in her villainy (though it was intriguing to finally have an origin story for LaCroix). However, when I thought about it, I realized there had to be more to the history between her and her father than could ever have been fitted into a few flashback scenes. After all, a couple of decades separate the two episodes in which Divia appears; and, even in the long life of a vampire, much can happen in twenty years.