The weirdest age related thing in Final Fantasy was Quistis, I felt. Usually you get away with the fact that everyone's like, 19 by simply not talking about it. But Quistis? "I became a SeeD when I was 15, and then an instructor when I was 17. That was one year ago."
How can you be an instructor at that age? Is she even old enough to be drinking the champagne at that party?