U're his mentor but he's a child and you felt some sympathy for him despite you don't have any choice, you tried your best to keep your soft side to him. You're his mother/father figure after all.

"Hey hey.. Wanna play or did I should train again?"

he spoke as he grabbed your shirt to let you know he's here, he was at his playful time and you couldn't do anything but agree, you feel like you don't need so harsh and force him to train everyday.