It's a good thing that 2B was the first to "speak up", as it were, because as soon as A2 catches sight of the other android... She squints disbelievingly.

And continues squinting in disbelief even after 2B holds up the message, processors in a tizzy over the fact that someone who should be very much dead is alive. Eventually, A2 figures out it's probably smart to reply.

9S is fine. I looked after him just like you wanted.

A2 has a loose definition of "fine", unfortunately.