Hecate, Greek goddess associated with magic, crossroads, witchcraft and necromancy. Also, she’s considered a protector of mothers and of the wilderness.
This was requested by someone who really liked Hecate. I like her a lot, too, but she doesn’t appear in a lot of stories I know, so I forgot her… Now I remember she’s a pretty powerful, ancient goddess, related to the dark arts (hohoho), mother of some monsters (like Scylla, ugh) and inspiration to some awesome witches like Medea. She stayed loyal to Zeus so he respected her and even feared her immense power. Also, Hecate is represented in arts in many different ways: as the triple gooddess, with three heads, with a dog, a snake and a key, alone, with three animal heads, with torches… I believe she’s more of a benevolent goddess who really likes humans and helps them in every possible way, but nowadays people prefer her dark side, her “crone aspect”, as a chtonic deity.