Alright, I have once again gotten back to work on this. I've revamped my current demo and made it much better. The main thing I have to do now is finish up the first dungeon (which actually is complete, though it at the moment is much too large, so I'm shrinking it a bit to make it more player-friendly,) and then I'll upload a demo for you to try out. For the time being, I've just gone with my original battler design for the enemies.
Also, I never answered your question, Hex; the enemies' back story is that they are drawn by Pablo to fight again guy and his allies, mainly to keep Pablo himself entertained. (He probably won't see this reply for a month or two, but I figured I'd answer since he asked.)
EDIT: Question for everyone. Right now, I have it so you can only class change at save points. Should I change it so you can class change anywhere via the menu?
EDIT 2: Actually, I just fixed a typo in this edit. Stupid typos. -_-