Its the question thats been plaguing fans of theThe Flashfor months: Who the heck is the Mystery Girl?
Good news: Well be getting answers soon!
Ive known since before we started this season, Gustin says of her identity.

Credit: The CW
Ive spent all of season 4 being excited about this thing that were going to do in season 5!
But the teases go even further back than fans realize.
Itll be one of the cooler reveals that weve done in a couple seasons, Gustin says.

The CW
Mystery Girls latest appearance back in episode 15, however, left some fans (and cast members!)
But I didnt know what that was when I watched that episode.
I was like, Huh, I wonder what thats about.
Panabaker was also surprised by Mystery Girls ominous look at the end of the hour.
What does it mean?!
The Flashairs Tuesdays at 8 p.m.
ET on the CW.