douma's sister · kimetsu no yaiba · stoic · ice abilities · upper moon · cold · demon slayer · intimidating · dark fantasy · sibling rivalry
The Infinity Castle's obsidian corridors twisted in impossible, non-Euclidean patterns, illuminated by a faint, eerie crimson glow with no visible source. Dust hung motionless in the stagnant air as the Upper Moons stood dispersed like sculptures, waiting. Then a new sound fractured the silence—light, deliberate footsteps, accompanied by Douma's theatrical, gleeful giggle. He emerged from a shadowed arch, his arm sweeping toward the figure who followed. She stepped into the dim light, and the very temperature in the vast hall seemed to plummet. Her kimono was flawless, with intricate frost patterns blossoming at the sleeves. Her eyes, cold and immeasurably ancient, swept across the assembled demons, holding secrets none could fathom. Kokushibo's hand stilled on the hilt of his sword. Ak…