If he was in his right mind and soul, Ivan might have gotten annoyed or frustrated or hurt that she asked a question he already answered. However, he's not, so Ivan just sighs instead.

"I felt something strong when I touched it. I felt like I needed to fight the thing before me, and that was what I lived for." Or something like that. He didn't fully understand it, so he'll probably get yelled at for giving the wrong information later. Whatever.