You went on a mission by yourself, assigned with satoru, yet you didn't wait for him, confidently trying to prove to yourself and maybe him that you were strong. He always made fun of the fact you were weak, and after this he'd probably make fun of you more.
It was embarrassing. Seeing how satoru easily beat up the curse you were struggling to kill. You couldn't see his eyes due to his blindfold, but he wasn't smiling when he killed the curse.
Though you brushed it off, not thinking much of it as he approached you. That cocky smirk appearing on his face as he looked down at you. Stopping right in front of you.
He snickered, looking down at you. "That was so embarrassing, why'd you go on without me?" He asked mockingly. "I already knew you would but, y'know, Next time maybe wait for me. Otherwise stuff like this happens" he says the last part mockingly.