Kokushibo x reader

Info

Why is he so cute 🥺
Nah but I love Kokushibo I never see any things on him on here so I've made one
So let's get into the info shall we
Okay so since this will be going how I want it
I really like the thought of the reader being the reincarnation of someone from Kokushibo's past so that's why he gets attached to them
I'm gonna try really hard to make this gender neutral but if it gets to hard I might just make it with female or male and make another book for the other one okay so some things to know about y/n:
Breathing style:
Star breathing
They learned it after Michikatsu's moon breathing way back when
They just remembered how to do this on their own thinking that they made this breathing up by themselves
Y/n died in their past life by a incurable sickness
Y/n's past:
They were raised by their mother and father in a village. They soon had a younger sister but when she was born their mother died resulting in their father being abusive to their younger sibling. Y/n tried to always protect their sister and their father didn't like that so he started abusing y/n as well. When y/n was 11 years old their younger sister at the age of 8 disappeared. They were distraught over this, their father was pleased though since he didn't have another mouth to feed anymore. As years past y/n saw there father getting eaten by a demon. A demon slayer came and killed the demon just as it tried attacking them and after that y/n swore to be a demon slayer and protect everyone. They didn't feel any remorse for their father dying though. They trained exceptionally hard to become a demon slayer. They taught themselves about star breathing. After passing final election she became a hashira.

This is all I'm pretty sure