Wait, what? Greta's shoulders drop, and she stares at him in open bewilderment. So he is Rush, but he doesn't think they've met? "Wh--" she starts, at a loss, before pausing and making a visible effort to collect herself. There must be some sort of explanation. She just needs to root it out.

"I'm sorry," she says first, because now he's looking at her as if she's the one who's gone mad. "We have met, but... perhaps you don't remember?" she hazards. She could joke that she doesn't normally dress anything like this, but it's not as if she's unrecognizable, so that can't be it. "I'm Greta," she adds, in case that jostles something loose.