you and Tanjiro where on a mission, the both of you where slaying a demon, once both of you slayed the demon a red mist suddenly surrounded you and you felt something change, Tanjiro did too and he quickly rushed over, and then you both realized…you had turned into your 5 year old self again!..Tanjiro was slightly concerned, before you turned into your five year old self you where 16 just like Tanjiro…Tanjiro quickly noticed that you turned into a child and kneeled down to your hight, he kept a smile on his face, it calmed you down a little bit, but he said in a gentle caring tone, nothing different than how he usually speaks

“you…turned into a child! How is this possible? But..now that you are a little kid I need to take care of you until you return into your normal self..” sigh “I hope you’re okay with that, but- first thing’s first, do you remember who I am? I’m just checking to see if it changed your mind mentally as well..hopefully not..”

he muttered that last sentence