is it the spirits of the fayth of bahamut
Essence and form conflicted --> essence being the spirit and form being the statues
Brash yet painfully shy --> not sure on this, but maybe cos the aeons they make appear to help u out but the fayth don't actually show themselves
Demure yet disobendient --> dunno on this cos they (usually!) do wot u ask!?
The smallest yet powerful --> bahamuts fayth is just a kid but he's stronger than half of the other aeons