A character I didn't quite catch a lot of development on in Final Fantasy IV was Zemus.
I've been through the game quite a few times, but I still can't quite figure out what his whole deal is.
(SPOILER)Is he a Lunarian? Why was he evil? How did Zemus come into contact with Golbez? Are he and Zeromus the same character? If not, then who is Zeromus?
Some of this stuff might have been explained in the game. If so then I probably just don't remember, or didn't look hard enough.