http://www.easydamus.com/alignment.html

You can do all characters for a given title or just do whoever you feel like.

To give a few examples to start off with....

Cecil: Starts off as Lawful Neutral (Dark Knight) but shifts into clear cut Lawful Good (Paladin)
Ashe: Same deal as Cecil, really.
Squall: ...same deal as the other two...
Zidane and Tidus: Chaotic Good to the core. Snow too.
FFIX Garland: Lawful Neutral
Kuja: Neutral Evil