i see(i tried the pull theory too but with 0% succes rate ç_ç )but aside from the very rare ampfies, manyus and the 2500 gold,there isnt much worth in it for me since i have got almost 3.000.000 gold already and almost max lv squads(evolved too) so i dont really know what to do.
i should just keep on piling them up untill they release the 2nd affection evolution(i saw in a video that you could sell girls for an in-game value and use it to buy items from the shop).