Originally Posted by
Alisa180
The picture right below the second paragraph quoted essentially illustrates that scene. 6*2=12.
Also, seconding what others have said. The twins are at that point in physical maturity where they can get away with being a 'physical age' of up to 14/15, especially in Alphinaud's case (my own younger brother didn't hit his growth spurt until he was around 15, I was taller then him for the longest time and I'm only 5'3). Combined with the slower growth of Elezen, by my own rough calculations, at least two years, possibly more, would have to be confirmed to pass in-game to justify a model change for the twins to reflect their growth.
I don't see that happening. Ever.