I like to think that when he eats all those memories he gets severe indigestion, especially if he sees any squick. I bet when he was nomming on poor Terra's memories he got some extreme DO NOT WANT! vibes once Kefka showed up in them.

I'm not sure... All I remember Terra adores him. But what did your moogle say to you when you received him? I had Kuja as my party leader so his line was “You’re nicer than you look, kupo….I’ll help you in return, kupo…”