Exactly. Specifically, Kes says, "I never want to see that part of myself again," and when Tuvok responds, "To which part are you referring?" she says, "To the part of me which got pleasure from destroying those plants in the Airponics bay. To the part of me that was tempted to go with Tanis. I never realised I had such dark impulses."
Generally, "Cold Fire" is one of the episodes that makes me dislike Kes, but I'll say this to her credit: she takes responsibility for her own dark impulses. She doesn't blame Tanis' "manipulations" as Lynx does above. Nor does she see the episode as a temptation met and overcome. She's naive, but she's not that naive. She says that she never wants to see that part of herself again, not that she never will, and her words are motivated by a fear of what she's learned about herself; a fear that in the light of the events in "Fury" is completely justified.
As for "Warlord," when Tieran speaks to Kes, in her mind, he says that a part of her is attracted by what he has to offer, which I believe, given the evidence of "Cold Fire" and "Fury."
As for "Darkling," Kes is attracted to Zahir because he's selfish and dangerous. Her attraction to Zahir is meant to parallel and resemble the inner darkness the doctor is dealing with in the episode. But the doctor's inner darkness is the result of sloppy, amateur programming on his part. It's a computer bug. Kes' darkness is psychological. And it's what leads her away from Neelix, a kind and thoughtful person with vulnerability, to Zahir, a questionable character. The only good that comes out of it all is that Neelix really does deserve better.
