Prompto, you are a good person, and Ignis would let Gladio punch anyone that was mean to you outside of the group. That may or may not include your parents. Ignis had noticed that his parents weren't around much, but he didn't fully grasp how far it went into neglect until this journey. Out of all their losses, their deaths would not be so sad, Ignis allowed himself to think all of once. Except that Prompto still loved them, because of course he did.

The heal tapping helps him know where Prompto is, although he had heard the shifting easily enough as he sat down. "Yes."

A simple word with plenty of meaning; Ignis feels strong enough for it this time, finally.