Sorry, let me clairify. He leaves your party after so long when you get him during Sabin's part of the three way story, he's left me before I've hit the waterfall. He says, "My work here is done" or somehting like that at the end of the battle and takes off. I was wondering what criteria the game uses for when he goes.

Also, I haven't used him after Kohlington either for fear that he might take off when I really need him around Zozo or something. So again I'm wondering how long he stays with the party then as well.