He had to put duty first here. If it were up to him personally other things would be going on. However, due to timing and not wanting to drag this out Ignis hid his feelings behind the duty of what needed to be done. It was an old trick in his book, to put duty first and focus on that above everything else. At times it was all he felt he had as he did now. Ignis had simply put his armour on so to speak and shoved his feelings aside. Old habits.

The advisor refused to show anymore sadness in front of his daughter too, as he'd deal with that later too by himself as he always did. So for now he silently stepped aside and let Tony lead while remaining quiet and observing.