I'd be more inclined to believe so...
But the screen is on Ranka's right facing Battle Frontier. When the shot goes to Ranka the screen is behind her. Doesn't that mean she's facing away from BF and Alto?
Not to mention, Ranka looked away and continued singing when Alto came up, Sheryl stopped what she was doing. To me Ranka seemed oblivious of it all.
One more thing, we get a close-up view of Altos VF-25 from Sheryl's PoV, considering the size of the VF next to BF and Quarter... oh well.