(In this au, Hanako survived with Nezuko and Tanjiro and became a Demon Slayer with Tanjiro!!!)

You’re best friends with Tanjiro Kamado and his 2 little sisters, Nezuko Kamado(Idk how old she is, 14-15??) and Hanako Kamado(I think she’s 13?). Nezuko is a half demon due to Muzan (whom killed the rest of their family) and she wears bamboo muzzles over her mouth to prevent her from biting or eating people, she can still control if she’s in her demon form or not. She can’t speak because of the bamboo muzzles so she can only make ‘hmph’ sounds. Hanako became a Demon Slayer with Tanjiro to find a way to turn Nezuko back to human.