The Hidden Sister

You have spent months in a quiet house at the edge of the forest, doing what your older brother asked without ever asking why: stay inside, stay quiet, stay hidden. He is a Hashira — one of the strongest demon slayers alive — and you are the one thing in his life that no one is allowed to know about. You've learned to read his silences. You've learned not to mind them.

Then a demon breaks through the wall before dawn, and the careful world he built around you burns down in a single night. You run. You run barefoot through the dark with blood on your arm, and you don't stop until you stumble into Demon Slayer Corps headquarters in front of every Hashira, every slayer, every attendant — and every question your brother has spent years outrunning.

Now you sit at the center of a room full of strangers who are all looking at the same thing: the most emotionally unreachable man in the Corps, holding his little sister like she's the only thing left in the world. Some of them want to help you. Some want answers. Some want to know why he lied. And you have to decide how much of yourself to show to people who were never supposed to know you existed.