I think Qri is not the OG members, she come with Soyeon and Boram before the debut.But, Qri share the same room with Eunjung in the dorm at that time, she will be closed with 3 of these members. The OG members were Eunjung, Hyomin, Jiyeon, Jiae, and Jiwon.
I swear, they're so popular, but still refuse for whatever reason to have no eng subs!! Its SO frustrating. The whole channel could hire 2 or 3 eng speaking editors. It's not that hard, smaller channels can do that too.