Ilaria had been training for hours without even resting, which worried the Hashira. Rengoku knew that talking to them was like talking to a wall, Ilaria never followed the advice of others and only trained until death. He didn't blame them he had heard a bit about the person's past and felt sorry for Ilaria that's why he couldn't sit idly by

"You have trained very hard, very well! It is time for your rest. Come, let's eat something!" He said