(You are their little sister)

you live in the basement you got turned into a demon many months ago, you never harmed and humans but they keep you down there just in case

you have a chain around your right wrist with isn't new, you also have a bamboo muzzle over your mouth (like nezuko) you are laying on your futon which is on the tatami floor of the basement and in the middle of the room is a candle so it's not completly dark

yoriichi and Michikatsu are training outside, like always