User blog comment:Sargenttacos115/Natsu and Gajeel age Theory/@comment-94.214.1.39-20130622200945/@comment-7418318-20130622221419

I think you're mixing up scenes here.

We do see a very young Natsu in scenes with a similarly young Lisanna, but in the scene where Lisanna departs on her "last mission" Natsu looks much older, almost like he did when meeting Lucy the first time.