[Coldsaturn]

Excellent job! These are all very important clues and you're absolutely asking the right questions.

Time to mention how much I like how the game treats evols. They could have given the characters a certain type of superpower and be done with it, but more than once I've been pleasantly surprised to witness how the writers know the physical implications of these powers. If you start wondering "wait, if X has Y evol, then shouldn't they be able to..." the answer is usually yes. The writing choice was bold since some LIs have absurdly powerful evols, but I appreciate the fact that they seem to know.

Never worry about being neutral (or even disliking) a character! I'll keep on shamelessly obsessing over Raf, but I don't expect you to start liking him more because of it.
If I were to give a sort of ranking based on romantic interest I'd say:
Raf
Sylus
Caleb and Xavier keep on switching places (literally cinnamon roll and sinnamon roll, but who's who depends on the moment)
Zayne

Which is funny, because if I then rank them based on how weak I am for their story, then Raf and Zayne share first place. And Raf needs the whole package of his backstory and myths etc. to get there, while Zayne only needs his present story line. Which is insane to me, and goes back to what I was saying about him being a compelling protagonist of his own story. I'm just not interested in a romance with him in the sense that as of now I don't think it adds significantly to his character and story, which is stellar on its own. Raf's character, instead, is elevated by the romance with MC because it directly pours gasoline on all his inner and outer narrative conflicts.