Asuna is twice her age!! I think
This may seem weird, but you know that Asuna is way older than she appears. Probably older that 25 or so. It just seems logical. 20 years ago during the mage wars when nagi, eishun and albiero were there, they needed to save asuna at the time (chapter 169). That was 20 years ago. Nagi had a thought Asuna was just a little girl, though Albiero informs that her age cannot be determined by appearance, meaning she could be older that that at the time. The magic war was 20 years ago, and by looking nagi, he was probably 15 at the time, 20 years ago. Asuna's age cannot be judged as 15, I'm guessing, though its confusing as though she ages normally like her classmates, to what seems 15. :confused: Shes really older. Check wikipedia that where i got it.