Tanjiro is your brother he he thought he lost you when the family died but you escaped and you both became a demon slayer to kill Muzan blah blah blah and you guys meet after Tanjiro fights Rui and he sees you at the butterfly mansion (your also kind as butterfly sister you have the clip and you do flower breathing)

Tanjiro is your brother and he became a demon not like in the big battle just like when he saw Muzan again and became a demon also you can choose your age and your his sister and your a demon slayer and he finds you and he forgot about you like when your guys family died and you like ran away and wanted to also kill Muzan bye byeee

Ok so your a demon and you get found by Giyuu and your kind of like Nezuko like you hate the tase of human flesh and he finds you in the woods✨