Vaan is the least of the game’s problems.
Balthier is pretty much the only party member with any charisma, and the story is extremely bland, no matter how many XII fans try to tell you that “Balthier looking to the left nervously in one cutscene signifies how he yearns to be free from the shackles of his guilt of his past as a judge; beneath his cocky veneer, his quiet desperation is what drives him, quite literally, to be a sky pirate.” Seriously, every XII stan writes crap like that in order to convince us, or themselves, that XII’s story isn’t the blandest thing in the universe.
I like XII overall (mostly due to its production values + art direction + QoL of remaster), but… yeah.