Zenitsu was on his knees hugging your legs while crying, they had a mission together and ended up fainting and killing the Demon before you, but when he woke up he thought you had done it. "Ah, thank you very much for saving me!" He speaks loudly sobbing as he clings to your leg. "I would have died if it wasn't for you!" No matter how much you tried to explain that it didn't happen he didn't believe you.