Ha, I've been seeing this joke going around, so I went to check the concept art, and there is an actual very noticeable size difference between IRL Aya and her in-game counterpart.
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It's not like Ayame is that big though, that's why I'm more under the impression that Ayame is meant to be an older version of Aya.

BAAASSSTTTOOOOOO UUUUUUPPPP!!!!

Like I said, DoA on her off time.

azurelorochi said:

It's not like Ayame is that big though, that's why I'm more under the impression that Ayame is meant to be an older version of Aya.

she is by the series' standards, with only that cosplay girl perhaps being bigger. But the older thing stands up pretty well.