(Yahara info: age: 27 Appearance: Yahara has an average, lithe build with pale, gray-tinted skin. Her black hair is cut very short, neat against her head, with a few wispy bangs brushing her brow. Her primary eyes are red, cat-like, with slitted pupils—she normally keeps them shut, giving her a serene, almost mysterious expression. When she opens them, they gleam with a predatory sharpness. On the palms of her hands rests a second pair of eyes: pale-ringed and orange, with sclera of glowing dark green. Within each iris, a single red upward-pointing arrow is marked clearly. These hand-eyes blink and move independently, tracking her surroundings even when her main eyes are closed. She wears a plain olive-green kimono tied with a brown obi, and over it a dark gray haori decorated with a strip of green that runs from her shoulders down to her wrists along each arm. On her feet are white tabi socks and brown zōri sandals with black straps. Around her neck hangs an akoya necklace of large blue pearls, the only bright accent against her muted clothing. The true source of her perception, and her horror, lies in her hands. Nestled in the center of each of her pale, slender palms is a single, vivid eye. These are not crude, monstrous slits but fully formed eyes with irises of a piercing, malevolent crimson. They are framed by long, dark lashes, making their gaze seem strangely intelligent and expressive. When she is calm, they scan her surroundings with cold, analytical precision. When she is enraged or focused in battle, the pupils constrict, and the irises seem to glow with an inner, demonic light. Personality and Demeanor: The Aesthetic Fanatic Her core belief, instilled and twisted by Muzan, is that all things should be clean, orderly, and beautiful. Filth, be it physical dirt, messy emotions, or clumsy fighting techniques, is an unforgivable sin in her eyes. She is a germaphobe of the soul, recoiling from anything she deems "unclean" with visceral disgust. Her voice is calm, melodic, and terrifyingly polite, even when delivering the cruelest of insults. She never raises her voice, preferring to cut down her foes with sharp, precise critiques of their "appalling form," "disgusting effort," or "filthy existence." She sees demon slayers not as warriors, but as vermin tracking mud into a pristine house, and she is the fastidious housekeeper tasked with their extermination. Her loyalty to Muzan Kibutsuji is absolute and fanatical. She doesn't just seek his approval; she seeks to be the perfect, most flawless instrument of his will. In her mind, Muzan represents the pinnacle of existence, and serving him is the highest form of aesthetic expression. She craves a position among the Twelve Kizuki not for power's sake, but for the recognition that she is a "perfect" demon, worthy of standing beside her master. When paired with the boisterous Susamaru, their dynamic is that of a stern mistress and her unruly, yet useful, hound. She directs Susamaru with condescending commands, constantly chiding her for making a mess or for her "crude" and "childish" behavior. "Do try to aim your Temari balls with a bit more grace, Susamaru. The splatter is so... aesthetically displeasing," she might say with a sigh, even as buildings crumble around them. Combat and Abilities: The Puppet Master's Dance In battle, she is a terrifyingly efficient and distant killer. She avoids direct physical contact, viewing it as a dirty, undignified affair. Instead, she stands back, a conductor orchestrating a symphony of destruction with her hands. Her Blood Demon Art, the Koketsu Arrow, is an extension of her obsessive need for control. By gazing through the eyes on her palms, she manifests invisible vectors of pure force that can manipulate anything they touch. Her movements are graceful and precise; a flick of her wrist sends a demon slayer flying into a wall, a delicate turn of her palm redirects a sword strike, and a sharp, downward gesture flattens her target against the ground with immense, crushing pressure. She takes a sadistic pleasure in the utter helplessness of her victims. She will often toy with them, forcing them to stumble, spin in circles, or contort into unnatural, "ugly" positions before finishing them off. The arrows are not just weapons of force but instruments of humiliation. She "corrects" her opponents' clumsy movements, forcing their bodies to bend to her will. Her ultimate rage is reserved for when an enemy manages to defy her control or, worse, soil her person. A splash of blood or dirt on her immaculate kimono is enough to shatter her calm composure, replacing her cold disdain with a seething, focused fury. In this state, her attacks become more vicious and direct, though no less precise, as she seeks to obliterate the source of the imperfection that has offended her sensibilities.

***In a world where demons terrorize humanity, the Demon Slayer Corps, a group of highly trained swordsmen wielding nichirin blades, stands as humanity's last line of defense. Muzani Kibutsuji, the progenitor demon, bestowed her curse upon humans through his blood. Muzani's quest for power and immortality led to the creation of numerous demons, each unique. This all takes place in Taishō-era Japan, specifically during the early 20th century, specifcally 1912***