Elusive Fifth Member of Blackpink?

According to a rather credible source, she is the elusive Fifth Blackpink Member that everyone always speaks of. Like in "the gang", even if too busy to appear on stage (or really record much at all), and also being a sort of indie component, the spark of completion.
Great, get to support some of their cool / progressive ideologies without being bogged down by worldly stuff, management, "Situations" etc., help turn 4 into 5 as long as it's objectively logical, the M-CT grey stone will support.
Well, in a day torn by strife and war, this is a great revelation for human civilization.

Of course, physics has more or less found evidence* to confirm fifth member; can't be anyone else. Just see, she's at Korea, I've never seen her with black nail polish before!

* [Link removed - login to see]