I've recently started playing FFT: WotL on iOS, and learned from the wiki sites that the Bravery and Faith stats determine various important factors in combat (frequency of reaction commands, effectiveness of spells, etc) and how Ramza's "Steel" ability can raise someone else's Bravery, but the effect of that ability doesn't seem to last after combat.
However, I have been keeping track of some of my characters' Bravery/Faith stats and they do change from time to time, but so far I haven't really found rhyme or reason to it.
Are there any guides that explain whether it's possible to permanently raise the Bravery stat, and if so, how?