"Aw, no, it's not a bad thing, being different! I mean -- you do what you wanna do and as long as you're happy and nobody's getting hurt or anythin', that's okay, right?"

Calling out the stranger's unique appearance was one thing, but alienating her was not part of the plan at all, and Prompto's grimace at his own insensitivity is slight but visible all the same. "Cosplayers are, uh, people who dress up as characters from movies and shows and videogames? That's not really all they do but that's kinda the basic description."