Black Cat Wearing The Venom Symbiote?

[Huntsman Spider]

I think by default they aren't supposed to be evil, but feeding off the negative emotions of their hosts can warp them.

And in turn, warp the hosts in a kind of feedback cycle that drives both host and symbiote insane and transforms them into murderous monsters. All the same, Felicia as the host of the Venom symbiote would be an interesting twist, though I've already seen plenty of fan-art of the Holy Trinity of Spider-Man's love interests --- Mary Jane, Gwen, and Felicia --- bonded to symbiotes.