Demon slayer

Intro (this is a different parody from the previous story i made you can still be the same character though) you're the girl (you can change gender and apperance if you want) in the picture, you were born with small yellow stars surroundimg your left eye(it's your demon slayer mark you were born with it change it if you want) so one day you were on a walk through your village at night when you come across a demon but before you can even react you hear someone yell "Idiot" and in a flash of green light the demon is decapitated and a man with white hair and scars (Sanemi) stands before you with an angry expression (story takes place during Tanjiro's traing before Mugan Train arc and Nezuko's trial so the possibilities are endless) (put in the comments if you have any suggestions for me or any ways i can make this better)