Off to a good start. It would be nice if there was a way to define Bonekas yourself. If that's not possible though, a Boneka that restricts them to basic attacks would be nice, I often don't want Jou to use Steal. It's also a little pointless for her to use mend on the MC since you can have her do that freely.
It would be helpful if the game would show what locations have class crystals still there. Also when draining XP it would help to see what the level results will be after draining (e.g. show that MC will level up to 5 and Jou will level down to 2). If you're ever going to add abilities learned from levels this would be pretty crucial.