Rainn in the harem? I hope not... its already huge and there are far bigger priorities to be added before adding in random lesbians who dont seem all that into the MC anyway.
1. Azel is most obvious one with a nefarious modder leering over the potential of adding her into said harem (a modder not Braindrop, nope not him, stop fingering his direction, he is innocent i tell thee)
2. Zoey is basically wanting in after getting a taste but needs to accept said feelings first and foremost. Not far away.
3. Natalie is there and abouts, shes taking her time with the sexy stuff but wants a gold envelope invite sooner rather than later
4. The princess whatsherface has seemingly had a rewrite to not be anywhere near as dangerous a harem add so is literally on site and Rachel has been known to prompt participation from reluctant participants but dont think she will need much nudging.
5. Stacy, not entirely sure the point of her at the moment in the story as its mostly teases of mystery but i dont think its a stretch to say after maybe the above 4 shes the next most likely to be vag deep in the MCs little orgy party.
After that youve longer term targets including Harper, Skye, Willow and Jasmine who have had plenty of exposure as more than just fuck buddies no less if at all but Rainn? Nah, ideally shes way down the list.