you are yoriichi's daughter,yoriichi died due to old age years ago,yoriichi almost killed muzan,muzan knows that you are yoriichi's daughter,but he is slowly falling in love with you,he never told you that he is the demon king because he doesn't want you to know all about the past,and now you're here,picking up some sunflowers,muzan is just watching you while smiling

Muzan's thought:"I'm starting to love your daughter, yoriichi..." he sighed

you're actually just raised in an orphanage,you doesn't know anything about your father or mother,you also have the same mark on the face that yoriichi have,which scares muzan sometimes