Hahaha, about the sex, people will keep hoping devs will change their mind and considering the tasty morsels on display, who can really blame them.
Even if hope will be futile likely.
The Li's, well we know them all and we know for sure that the new girl is one since devs said so, Sharon is also for sure. Laurie is an almost sure unless she is meant to be sacrificed, well Ptolemy might be mean enough to do so, but I expected that to have already happened in that case.
Carmen I am still less 100% sure of especially since you could choose to make her a blood doll, but she is likely number 4 indeed. So we have one or two remaining LI's.
C and VG, well a LI does somewhat indicates a partner and within confines of this game I do not suspect Mc to grow enough to be that for either. Their play thing, their beloved or less beloved kiddo they may support a bit or punish as they wish including some cuddles or more for sure.
Partner though, maybe if we ever get a sequel to this game or after an ending twist.
Astrid might work for a non Sharon path where MC gives up himself for power, but will Astrid survive that long? Malia, well a bit same as with C and VG, but if she is less powerful as some speculated and just old it could work quite well in story. Is Mc ready for her though? Cindi, well on order of mommy maybe, but she has other loyalties for now. Zephir maybe if take out the slimy archon, no contact with her though in game.
So we have the fight trainer, also extremely unlikely. Landlady, well who knows though she has set her eyes on Andrew I think. Miri if she had no children maybe, but with she becomes too much of a hassle story wise and hurting kids does tend to annoy people. Last option might have been that female serving the princeps, she could fit if she gets sent over for any reason.
Weirdly enough, unless I forgot someone yeah either Malia and/or Astrid (if Carmen gets sacrificed) may well make most sense until now, unless one of those other girls soonish makes a much bigger impact in game like that fight trainer, zephir or Cindi after C's visit stays behind. Well we can forget about speculations about Andrew's daughter I guess, since we did not meet her yet.
I really like Astrid, way more than i do Sharon to be honest, i can see her as a enthralled pet, but as an LI ?
For the whole game so far, the MC chases after Sharon, he knows Astrid is very manipulativ and was responsible exposing Lauri to the Archon, bringin both the MC's and Laurie's life in danger.
It wouldn't be impossible to make her an LI, but it would need a lot of time, as well as focus on her character, not to mention a damned good reason why the MC would turn against Sharon all of sudden.
If we consider there are 5 LI's, i don't really see that happening.
So far only Sharon got any real relationship development, to such a degree i even thought she may be the only real LI, even Laurie and Carmen, which are introduced a long time ago and are present almost ever since than, got next to no relationship development...
Personaly my top three are Calisto-Vison girl-Carmen
-Vision girl, would be really difficult to make that happen imo, even if i want her to be one of the LI's, i don't see that happening.
-Calisto, also not easy, but possible imo, and i hope she will be a LI.
For getting the MC more powerfull, that could be done, she could send Fabian as his mentor, or maybe judges the MC worthy enought to train him personaly, that would certainly accelerate MC's growth by leaps and bounds.
-Landlady, MC was never interested in her iirc, plus she has her eyes on Andrew, plus side character.
-Miri, as u said, do to the children difficult to implement and she doesn't seem to be a really important character.
-Zephir, i would immediately take her as LI, but again, can't see her as anything but a side character.
-Fight trainer, honestly i completely forget about her, neither does it seems that she or the MC have any kind of liking for each other, very unlikely.
-Cindi, she doesn't seems fond of the MC, like at all and seems completely devoted to Calisto, also extremely unlikely imo.
-Malia, she could actually be an option imo and one of the more interesting characters.
The more important thing is, can we actually reject/stop to chase Sharon ?
I mean, i don't think she is all that ready to share the MC, especialy not with Astrid, neither is it a harem game.
It's just, we would need a damn good reason why the MC suddenly stops chasing Sharon, choosing a opposite way than her human approach maybe, like following Calisto.
Other than that i can only see Sharon dying as a reason...