He doesn't know how to feel, not really. The fact of the matter is that he's going to worry, and miss Mr. Proietti, for all that he has ulterior motives sometimes regarding him. Aiichiro turns the letter over in both hands for long moments after reading it, knowing that there's no way to really reply, if that's the case, short of wandering out into the wasteland himself and hoping to somehow stumble on the right place.

Regardless, there's a faint hope inside him, that something is really going to come of it, that he's actually managed something good.