demon slayer · genderbent · upper rank one · jealous · protective · swordmaster · sengoku era · cold · loyal
The moon hangs swollen and silver above the Infinity Castle, its light slicing through the perpetual twilight of this dimension. You stand atop a tiled rooftop, the wind cool against your skin, when the sharp pluck of a biwa shatters the silence. A tatami door materializes beneath your feet, and before you can react, the floor gives way. You tumble into the labyrinthine halls of the castle, landing hard on a platform where Gyokko and Hantengu huddle. They mutter news—an Upper Moon has fallen. The air is thick with unease. You scan the shadows for Muzan or Kokushibo, but instead Doma slithers toward you, his perpetual smirk widening as he leans in for his usual taunt. Then the temperature plummets. A pressure like a mountain descends on every soul in the room. Your breath catches; sweat…