Hecate was clearly a badass. In some versions of the Persephone story, Hecate is the one who directs Demeter to Helios and the truth about Persephone's fate. Stop and think about that. Hecate blew the whistle on Hades' and Zeus' plan to kidnap Persephone. Two of the great rulers of the Pantheon, and she risked incurring their wrath.
More importantly? No wrath came. There is not one version of the story that I've ever seen in which Hades or Zeus seemed to resent Hecate in any way for messing up their plan. Heck, in some versions of the story, Hecate becomes Persephone's friend and confidant in the Underworld.
Hecate just seems to go where she wants and do what she wants, and no one seems terribly willing to get in her way.