Quote Originally Posted by kyuven View Post
I wouldn't be surprised if Alphinaud and Alisaie were mutants born of magic man was not meant to know.
...on the other hand we also don't know their actual ages. they could be just hitting puberty for all we know.
It was mentioned in the Tales from the Calamity segment about them that they were 16 or so when they left Sharlayan for Eorzea
For something a bit more exact, it also mentions that in 1562 of the Sixth Astral Era when Sharlayan was evacuated they were less than one summer old.