It's a funny contrast. Sure, Inigo usually is the first to start on the dramatics, or to start shrieking, but those moments never really tend to land in annoyed territory as much as just general upset territory. 'Stress is not good for the baby' territory. (The baby being Inigo.)

Right now though? He looks so mopey. Even in the face of the total casual talk coming from the other two.

He looks over towards Tidus, just.. pouting.

"I'm so never talking to you again."

He's literally going to talk to Tidus again later today. Or tomorrow. It's said with the same determination a five year old would have about such a statement.