I concur with Schnee One, Yellow 13 wasn't truly evil IMO. He was just another soldier in the war just like Mobius One. Kind of a similar story with Mihaly, even if he did fight in the war for a slightly selfish reason.
I don't agree with the players being the evil guy, unless you play as a villain by plot reasons or make evil choices like in Fallout. But in Ace Combat? No! It's just a different point of view depending on which side of the conflict you look at it.
With the character i mean the player. We dont have real reasons to fight that war, we always follow all enemies even when they are retreating for somes extra points and even more inportant; we use QAAMs!!!