>>2858767Rei II was harmed when Unit - 00 when berserk remember? It was where Gendo ran down to free her from the ejected plug and burned his hands. As for when II (and by extension III) was born is an interesting question, we're told that the clones in the Reiquarium are for the dummy plug system, but they're also said to be "parts for Rei" this probably means that when Rei dies her soul simply makes its way to one of these clones. But I wonder when these shells were made, it could be that they were made as a batch all at once along with her original body or later on, perhaps starting after the death of Rei I. It's shown that they're able to have the bodies age far faster than normal by virtue of of the original Rei being made after the death of Yui, when Shinji was a toddler but by the time of NGE she's roughly the same age as him and Asuka. So maybe they were made over time and all aged up to match the age of Rei's current body and would remain in sync.