Nico was going to assume that he didn't have eyebrows under his mask, considering that he didn't appear to have hair anywhere else, so eyebrows would just look weird.

She scoffed again. "Yeah, I came all the way down here to wait patiently for you to finish destroying a bunch of robots so I could--"

The snark stopped coming as her expression twisted into one of incredulity.

"Okay, now you're just showing off."