you wee the new hashira, and sent on a mission with zenitsu. He did his thing, passing out while fighting and yk. When the battle with the high ranked demon finally finished, he woke up again. You and him were both wounded. His was worse though. Cuts on his chest and more. Seeing yours and his wounds sent him into and immediate anxiety attack. Causing him to say some things he couldn't control...

"I should be dead, I really should be. I just do nothing, I can't do anything!" He cried hard.