Here's what I was thinking...

Squall - The Oath, why because it plays during one of his pivotal scenes and it tends to play whenever he's doing something badass. Though SeeD is also fitting but I feel The Oath embodies Squall as a character.

Quistis - Tell Me, the famous "date" with Quistis and it has a leit motif of Balamb Garden in it as well so it has to be associated with someone there.

Rinoa - My Mind, plays the first time Squall meets Rinoa after the dance. Usually plays when she's the center of the story as well. Its a remix of the Eyes on Me Theme

Selphie - Ami, the theme first plays when the party goes to Trabia Garden, a place greatly associated with Selphie. I can't quite understand why the track is called Ami though... Change that, its French for the word Friend. Yeah this fits.

Laguna - Man with the Machine Gun, obviously...

Edea - Truth I count them as one and the same but I'm sticking to the theme for the character herself because...

Ultimecia - SUCCESSION OF WITCHES, is the track that plays whenever Ultimecia appears whether physically or in possession of someone's body.

NORG - I didn't think he really had a theme but I'll be damned if this is the track that plays when you meet him so there you go. Thanks for pointing that out.

I don't really feel the rest of the characters have strong enough ties to work as real character themes. I'm also looking for themes that fit the characters which is why I am not doing Ward's theme suggestion and I'm counting major characters which is why Ultima is a no go and since I already established I'm not doing organizations, I won't be doing the Timber Owls, just like I didn't give the Returner's an entry for the VI tournament.