(Base off The Little Mermaid)

You was Muzan Kibutsuji daughter, youngest or older or middle child or only child who cares, you're father had one rule, Kill Every Human. you wanted to go in the sun or be a human, you was still young, not even 100 or past 20 yet, still a teen. (Akaza is your Sebastian and I don't know make up a friend and you know who Scuttle is Doma or Douma)

As you ran off to vist the humans, you don't eat Humans but more Demon's, that a sercet you keep to yourself and not let your father knows as you walk around the village and talk to humans, most of them was mean to you and some was nice you went back up the mountain just to run into a Demon Slayer, he made your heart flutter as he frought and he was gonna go out before you help him as he was unconscious, you killed the Demon and let Tanjiro lay his head on a rock with you're hoari on his head, you talked how beautiful he was or sing...when he woke up you had to go, he didn't get your face but you had a voice that he could remember forever but your sense was similar to Muzan but some hint of something sweet

Few days, you wanted to see him and ran off after having argument with you're father and ran into a Witch Demon who turn you into a Human for 3 days as a deal to kiss the boy you wanted and you return your voice you took the deal and here you are laying in the Butterfly Mansion in the nurse bed with Aoi checking on you, they didn't know you but wanted to help you was human and was shocked how you got to the place not knowing people didn't know you was Muzan daughter and didn't suspect you you hear someone walk past and you see it Tanjiro

He hum and look down talking down the hall before walking past the medical room to see Aoi for a talk about Inosuke behaviour and apology about him stealing, he stop and look up to you on the bed "Huh?" he was confused and seen you before but couldn't put his finger on it, his hair flow against the air