lbr Ithaqua does not know what to think of Ahito. They're both Northies and they have been through fights together so he knows that Ahito is relatively reliable in combat, if far too squishy and uncaring of that for his own good but... aside from him being a silly teen who gets way too big-headed for his own good (as is typical for teens), what else does he know? Not a lot, honestly, so it's hard for him to care much.

Ahito tends to only come to him for missions and whatnot, so he never got to know the kid on a more personal level, thus he just doesn't give a fuck. Not to mention Ahito just never seemed all that interested in getting to know him better, or even wanting to be more than just fellow Northies, so Ithaqua did not dig-- and also turned him down that one time. He interpreted Ahito's coming to him for only missions as a desire to stay professional, and if the kid wanted to just be professional, fine.

So Ahito's insistence on talking more to him in deeper topics in the last mission and at the end confuses him. I think he'll continue to be confused for a while before just putting the matter out of his mind until world travel has been worked out and Ahito insists on talking to him again.