Also It's pretty much explained one of the things that hooked me into the genre with FFX (even though FFX is no where near the best JRPG or best FF ever) It wasn't really Tidus or Yuna's story. It was a combination of effort among the entire party.
The ultimate thing I use when judging a character is "What purpose did they serve?" what purpose does T3 serve in KOTOR a game I love a regularly play? nothing. He's not even a fully fleshed character.
Okay what purpose does Mission Vao serve? she gets you past a door and after that nothing much. Same with Zalbaar and Canderous.
Infact I can say that the game is about 2 party members, 3 at maximum.
It's about Bastila and Revan, Carth if we stretch it a bit. as much as I love Jolee Bindo or how much HK-47 makes me laugh beyond the point where they get you passed whatever plot door, they lose there value.
What purpose does Vaan serve in FFXII? a big one. He ultimately is the force that convinces Ashe that holding onto vengeance and hatred will lead her down the path of self destruction.
Vaan is constantly pointed out as being a kid with no reason for being there, and because FFXII is schizophrenic in it's pacing the viewpoint is obvious. But Vaan's journey WAS to discover what he wanted in life.
Everyone remembers 2 things about Vaan "I wanna be a sky pirate" and "I wound up being a sky pirate" and besides 'Captain Basch' that's constantly associated as his only character development. Let's get this out of the way. I despise Vaan becoming a Sky Pirate, it was utterly stupid.
Vaan after coming to terms with his vengeance and supporting Basch is brought along on the journey because Penelo has gone missing. He is not going to sit on his ass and wait for someone else to bring her back. Dude punched out a seeq any 'scared child' ran right away then.
On the journey to get Penelo back he encounters Ashe, free's her and sticks around. Ashe is cold and callous towards him showing that she has no respect or patience to the people she see's as beneath her this defines HER. She couldn't have done with with Balthier (a pirate) or Basch (who she thinks is a murderer) She turned to a person who had saved her life once and basically slapped him in disrespect.
Okay we have Penelo but we still don't know why Vaan's there and this is addressed in game. Ashe saw her dead husbands spirit and also saw that VAAN could see him. This connected them, Ashe can't be crazy because Vaan saw it too right? then she see's him at Jahara and so does Vaan and the two have an honest and polite discussion.
Vaan says he doesn't know what he has left in life, he's always felt like that saying "I'm going to be a sky pirate" because it was better than admitting that in the end he had nothing and as an orphan in an imperial controlled city, was mostly going to die with no dreams, no hopes, and no future.
The annoying part of Vaan's character, the "I'm going to be a sky pirate" becomes tragic, because it wasn't some boastful 17 year old who has dreams bigger than his head. It's a near adult who still has no direction in life saying anything at all which keeps him going.
The reason he came, the reason he followed Ashe was because without his vengence, he hopes she could give him his reason to exist, his purpose in life. Ashe says with sorrow "I don't know" because she can't promise Vaan anything, and he says "I will find it" with trust and determination and belief.
You want Vaan's reason? to search for his reason in LIFE. This is something that Ivalice has ALWAYS looked at in one for or another, the small story in the big picture. It's not the big war between the rebellion and the Empire that's important, it's 6 beings who are afraid, betrayed, and searching for whats left in there lives.
Once Vaan tells Ashe that he's given up his vengeance, he stops seeing the spirits. The spirits created by the occuria, the beings who wanted to create a 'big picture' story. of Ashe becoming the Dynas Queen and smiting entire armies.
And it wasn't Balthier who made her realize that vengence wasn't worth it. It wasn't Basch. It was Vaan, it was him letting go of hatred, it was him treating Larsa as a friend and it was a him who didn't want to kill Gabranth, the man who murdered his brother and made his life a living hell.
Vaan did grow up, he matured beyond 'I must have my revenge!' Note in the final scene where the Sun Cryst is going out of control, the one holding the blade that would rob it of any power, the sword of the kings, was Vaan. He was the one who had the potential to stop the world conquering weapon from being made.
Now you may be saying "But Basch or Balthier could have done that" if they had been edited to do so, the main judgement isn't whether another character with editing could have fulfilled it, it's if the same thing a character did could have been solved by a piece of paper "Here's how to disable this forcefield"
That automatically removes Mission and Jolee from being important in KOTOR, a map could show you the black Vulkar base. Zalbaar wasn't needed to deal with the issues on Kashyyk it only gives him a bit of development. The sand people are such cocks that straight up murdering them doesn't even net you dark side points! T3 could be replaced by a really sophisticated Spike. At this point Canderous, Bastila and Carth are the only 3 who I can't really find a way around.
A piece of paper couldn't tell Ashe "Vengence is wrong" well it could have but it would have been stupid. and the existing characters would have to be modified to give her the same deduction.
Keep in mind that Balthiers character isn't that he's forgiven his father or anything. he just knows the horrors first hand, he's constantly running away from his past because he has no desire to be reminded of it. He's warning Ashe about the danger of nethecite and being controlled
Basch is searching for redemption in the eyes of his queen, he's not looking for some grand answer to whether vengence should be pursued, mans a captain/general depending on your version. War's his blood, he may not like it but he's never had a qualm about killing to survive.
Of course the stupid stuff in FFXII is still stupid, trust me when I say without heavy retooling Fran isn't worthwhile and Penelo exists to be rescued, which can be served by an NPC version of Penelo.
So in the end, like KOTOR we're left with 4 characters who REALLY effect the party.
Ashe, Vaan, Balthier, Basch.
This ties in with this article. Vaan's story to the orphans wont be "I stopped a war! I killed Vayne!" his story will be "I went on an amazing adventure with amazing people" in fact no one KNOWS they killed Vayne! everything you do in the game goes unrecorded as far as history is concerned.
And that's why I hate Vaan becoming a Sky Pirate, for all his talk about how it was something he held onto just to HAVE something to hold onto, that he had no real desire or it... he ends up becoming one! So what was the point of the character arc? did he grow up and realize "Oh hey I wanna become a sky pirate!"
Actually the inconsistencies crop up a lot to the point there are two Vaan's. which makes sense there were 2 Directors who came in to replace Miura.
And I'm not saying this is limited to JRPGs or that it's unique. I just got a little sick of everyone bitching about FFXII in this thread, because it's both an example of United we Stand and the antithesis.