>>30605609The only ones I see staying on long term are Fauna and IRyS. Rest are college girls and a pro VA though admittedly I don't know how busy she gets.
Out of Myth, Ina is obviously the one who could pull out first. Gura and Ame are enigmas and are probably wondering themselves how committed they are to this. The remaining two are probably in it until they can find independent success at the very least.
I have no intelligence on StarsEN and their ambitions.