My Dear Demon|| Kokushibo x Female! reader

Mitsuri's younger sister y/n kanroji. Comes across upper moon 1, but doesn't get killed. Which is doesn't understand, but takes it as an act of friendship. She is similar to Misturi being born with muscles. She has black hair put into three braids the same as Mitsuri's. The rest of her outfit is the same as Mitsuri's...