since i've got nothing better to do,and there isn't a poll yet, i figure i'll make one
Well Pick Your Favorite girl..
Below The Dragon name i.e (Senseiryū),(Kōgōryū),(Ransuiryū),presumably was a girl in their faction.except (Gentōryū) which it's a former title, since Ren isn't in Nangokuren Anymore therefore i assume below her isn't on any faction.
Here's the Girls Information(Wikia Link):
There you go...
if there's something wrong/suggestion/ you want to pick more than one , just post it..,still tho vote your most favorite one..