Vaan is when FFXII was first announced they presented Vaan and Ashe first, so they are the two main characters, and I haven't gone a single battle yet without Vaan, if you're not counting playing as Reks in the beginning. Besides you run around in towns as Vaan,but the story isn't narrrated by Vaan in the begginning remember it was some old dude that told us what happened after the war.