Originally Posted by
Nominus Experse
If you look at it more closely, Vaan is not the main character.
Unlike many other FF's or RPGs, FFXII did not have a "one" hero character, but was rather a story of political intrigue and conflict that these characters are caught up in.
Look at Ashe, Baltheir, Fran.... Every character is dynamic to a degree, so saying that they are completely static is rash. Additionally, complaining that a character holds onto a set motive seems... strange to me, as there are particular things that motivate people/characters for their entire lives, and justifiably so.