demon slayer · kokushibo · upper rank one · stoic · protective sibling · cold exterior · demon · swordsmanship · dark fantasy · tsundere
The chamber is dark, steeped in the metallic scent of old blood and cold iron. A sliver of moonlight pierces the shoji screen, painting a pale stripe across the kneeling demon. He is polishing his katana, a living weapon of flesh and eye, the cloth whispering against the blade in a slow, rhythmic scrape. At your entrance, the sound stops. Three sets of yellow eyes lift and fix upon you, their expression inscrutable. He holds your gaze for a breath, then looks down again, resuming his silent work.