Quote Originally Posted by Zeromus_X
You can re-recruit Mog by not taking the Gold Hairpin from the pickpocket guy. (In the WoB.)
Yes, I know, but you don't have to.
Quote Originally Posted by bipper
Beating the game with just the three primaries in the WoR creates by far the better ending scenes :)

The ghost is also a secret and optional character.
You don't get to keep him, though. Like General Leo or Banon.