[Coldsaturn]

"brother-con/sis-con just grabs me by the gonads a little harder than demon-lover"
You're so valid for this. What can I say if not "yes"?

I have a love/hate relationship with Zayne because he's not just someone I know I would end up going for in real life, he literally reminds me of a couple of my ex-partners. I fear that's the reason he's so adamantly at the bottom of my ranking, too close to home and I've ended those relationships for good reasons lmao

I completely agree with your second list, I could have written it myself.
I definitely have to give a shout out to Zayne's plot in the story. To me, he's the closest thing we could have to a "protagonist" in this story beyond MC. Every LI has personal stakes and individual conflicts with EVER, but something about Zayne's plot line just reads as the most natural to me if I ever had to imagine a book set into that world (at least as long as we don't touch the master of fate thread, but that's personal taste). Caleb would be a close second, but his chronic lack of content compared to the OG3 (Zayne, Xav, Raf) makes it impossible to reach Zayne's range, unfortunately.
Xavier saddens me as a reader and as a writer because I'm so in love with time-travel stories and yet I'm always left feeling like I'm missing so much angst from him. The latest main story chapter tried to deliver a bit on that, but it's still very far from what I'm craving. He's still stable in my ranking, but I wish infold pushed so much harder with him. Or maybe I'm just not the target audience for his characterization, so I end up not feeling like it's matching the trope to my liking.