Who did Amasawa-san go see in the hospital?


As we find out at the end of the series…

> Amasawa Yuuko's brother actually died in an accident some years ago and was
> not in a coma like she thought.

So who did she go visit in the hospital then? Was it a very complicated
hologram and she's never taken her glasses off the entire time (hard to
believe, but not impossible)? Or was it another person in disguise hired by
the Megamass?

