[Hiro doesn't say anything right away, still thinking about it. In the pause, the ring of light still coming through the manhole cover behind them goes dark, obstructed momentarily. He can feel the hair on the back of his neck prickle nervously; but then the light's back, and there's the slow and steady rumble of huge footsteps passing overhead at street level.

He lets out the breath he was holding only when it's gone.]

I don't know -

[He admits, at least, that Callaghan's rattled his certainty a little, frowning down at the ground while he's counting steps to a left turn. Thirty-five, thirty-six...]

- but the current Baymax isn't the one Tadashi built. Same materials, same programming, same design except I upgraded the batteries, but the original was lost inside the portal when - when we went in to rescue Abigail.

[That other awkward elephant in the room okay moving on -]

He took the healthcare chip out himself and sent it back with the pod, before I lost him. I didn't think about it at the time, because I didn't find the chip until weeks later, but now...