User blog comment:RumbleXRumble/The Nen Personalities categories and their polar opposites/@comment-14902757-20150606211055/@comment-4896558-20150606220038

Well there are some examples of the polar opposite personality theory, with examples being Machi and Nobunaga Hazama, Phinks and Feitan, Knuckle Bine and Shoot McMahon, Gon Freecss and Killua Zoldyck, and perhaps Isaac Netero and Zeno Zoldyck. But again this is just a theory and while there have been examples of how you've mentioned about the relationships of polar opposites by nen type have just as good of relationships as others like Shizuku and Franklin or Silva Zoldyck and Kikyo Zoldyck.

It's just really confusing or blurry like you've said, since in one point there is some evidence that backs this theory up, but in another it's just speculation and some conjecture that I've theorized and wanted to share to hopefully get some more generalized ideas about it.

As for Palm's love interest with Knov... to be honest I think she's just emotionally obsessed with anyone that woos her in the right way in sense, since Knov's cold and serious attitude and him telling her that she's an important asset because of her ability. She falls in love with him because she's so emotionally insecure that just saying those kind of words just makes her feel overjoyed and whatnot that she then probably mixes love with admiration. Since personally thinking, Palm admires Knov more than she loves him or actually realizes to be honest.

But again that's all just theory on my part...