He would definitely look a lot more suspicious and questionable with it on than without. The masks only remind her of the Fatui, so she wouldn't exactly think the best of him herself, though she hasn't categorized him as entirely innocent yet. His spiel about creation magic is still unnerving to her if it's indeed true.

"What's wrong with carving out your own path? Or even wearing something more comfortable and easier to move around? Do wars not exist in your world?"

It would be the only world that wasn't plagued with constant conflict if that were the case. Everyone else she's spoken to has had to learn to fight to survive long before they'd woken up underneath an alien tree's roots.