Natasha/Yelena
It almost physically hurt for her to see the face of her beloved friend in pain, but as she got back up, she watched the would-be Clint fade into smoke and just stared. Whatever it was, that wasn't her best friend.
Eyes turned to her sister and Natasha was clearly a little bit shaken after the whole thing. She took a second the nodded, realizing that this thing was far from over there were still battles happening around them. Still, shadows attacking and a few disappearing.
But for a moment, Natasha met Yelena's gaze and gave her a sideways smile. "You gonna tell me what that was all about when this is over?"