When it came to serious things, and especially to expressing his feelings, Noct always had a hard time. Ignis knows that. So he lets him go at his own pace and take his time. The time difference seems to be causing a significant problem. Did he lose... his eyesight in that time period? Probably from the battle. If it was to protect Noctis, then it is worth it.

Ignis scowls, his mood going even worse than before. "He will never have us, Noct. We don't yield so easily, especially to not to Ardyn." Ignis cannot see himself submitting to whatever Ardyn asks of him.

"We will have to carefully scour the ship in search for others and not separate. That man is dangerous." Too dangerous, according to the vision.