Well, I've never heard the first gen call themselves first gen. They are always the original members! The earliest is the second, I think. (correct me if I'm wrong)
2nd = nikki
3rd = sanki (never heard Goto say that, though)
4th = yonki
5th = gokki
6th = rokki
7 = either shichiki (maybe shikki) or nanaki
But I've never heard her say it, so, yeah ... no idea
