Quote Originally Posted by Ultima Shadow View Post
Also, since Odin/Gilgy are both random and allows no junctioning, how can you use them for possible classes?
He said obtaining a GF unlocks the class, but a character does not need that GF junctioned to use the class after that. Thus he will unlock Blue Mage for all his characters when he acquires Odin, and Dancer for them all when he acquires Gilgamesh.