Ignascio's expression, which hasn't changed in the entire introduction, flashes surprise. And something close to anticipation.

Hmm, Arcade thinks.

"Alex did? Is he here as well?"

...Ah, Arcade thinks.

Despite using the exact same tone as he already was, Rivas had given himself away to Arcade. The expression along with the fact that nearly no one in this wasteland called Alex by his first name. Especially someone like Rivas, who was prone to distancing via using last names.

This might be problematic. "That he did. Couldn't make it, though. Thus I am here in his stead."

Rivas returns to his previous expression. "How charming."