I don't know about that. Without going into spoilers the story makes it clear the MC is about to form a permanent bond to the island tribes and as of this newest update is also angling for an even stronger bond to 3 goddesses...and we haven't even started their romance arcs. In terms of what girls are not going to be harem members...I don't know...Selena seems to be permanently out but beyond that it's hard to say.I still need to play Ch 5 but from things I read I'm starting to feel might be better the girls from the Capital + Rin and the Pirate twins = the harem everyone else just sex scenes and not part of the harem