In the F2P mmo Perfect World you get a Fairy that flies around behind you where ever you go. While that game can get boring, that is one of the parts of the game I really thought was well thought out and added some very cool ability's to the game. You could customize them, they leveled up and you spent the points on different ability's. Some were healing spells for you or offensive. Some were things like stat boosts and well more than I could explain. But the point is you had control of the spells they are equipped with. I think something along the same or similar theme would rock with my own personal moogle. Not to far out an idea. FFXI had the adventuring buddy. Had mine up to like lv 65+ was very useful tho they needed to be able to be called in more places not just half of the game zones. Im thinking along the lines of everywhere, nowhere should be off limits.