Arturia is perhaps not the warmest person even under the best of circumstances, but that reaction is enough to tell her that something is seriously wrong. She steps towards him and lays a hand on Waver's shoulder (it helped that they were practically the same height).

"It's not working? Mine seem to be intact, but... they're not working entirely as they should. Something is going on here." She wants to ask if he's alright. Even if he was Arturia's adversary in the past they're in the same boat now. And for her that past is very past.

"Are you alright?"