Not a lot of the main characters from FF games were mature. You can't expect a 17 year old to be that mature can you now?
ofcouse
vaan was not even mature enough to be called a 17 year old look at larsa only 12 and yet more mature than vaan. you have to admit that vaan was a sissy and a whimp aswell. no charater from any other ff game was so inmature.
I haven't played the game yet but seen the previews... But when I get the moola I buy the game just to laugh at Vaan. 
