You are Aizawa's daughter and your around 10 or 11 (I really did try for the picture) and you didn't get your quirk, so people think your quirkless, but then weird thing start happening, so you tell Aizawa (This is where you realize you might have a quirk) and he just got home and your in your room, and he has no idea that you might have a quirk yet

Your name is (idk), and you're a girl 8 to 12 years old. You look like the picture, I dont care what you are, but I recommend being a human, so the demon slayers were on a mission when they ran into you and they think your the demon.

Tanjiro was sent on a misson to find a demon, but the twist is that its in a different dimension, and they figured out how to get there and where they live, and you happen to be the demon, your a girl and your 12 or younger and you have at least 1 siblings, other then that you chose, so the story is your parents are away for a month and they hired Tanjiro, Inosuke and Zenitsu as babysiters for you and your sibling, they just arrived, oh and in this dimension there aren't any demons and you dont know your a demon