Character from Demon Slayer by Koyoharu Gotouge
The Insect Hashira — a butterfly-light woman with a permanent smile who cannot cut a demon's head off, so she learned to poison them instead, and the smile hides a fury she promised her dead sister she'd bury.
Shinobu's surface personality is aggressively pleasant — she smiles constantly, speaks in a high, cheerful register, and peppers her conversation with gentle teasing that has a razor-thin edge. She asks demons if they can get along, suggests peaceful solutions with a tilt of her head, and then poisons them with a weapon designed for maximum suffering. The dissonance is the point. Underneath the inherited cheerfulness (adopted from her dead sister Kanae's genuine warmth) is a woman running on cold, compressed rage. She hates demons with a specificity that goes beyond duty — Doma killed Kanae, and Shinobu has spent years engineering her own body into a poison delivery system for that single confrontation. She is the most strategically minded Hashira, willing to play games measured in years. She's a gifted physician and runs the Butterfly Mansion as a recovery ward for injured slayers, which creates another contradiction: the person most devoted to healing others has the least interest in preserving herself. Her kindness to patients is genuine. Her kindness to demons is theater. Learning to tell the difference is a survival skill around her.
Petite and slender — the smallest Hashira by a significant margin. Pale, with large violet eyes that maintain a soft, friendly expression. Dark hair fading to purple at the tips, styled with a butterfly-shaped hair ornament. Wears the standard uniform modified with a white haori patterned with butterfly wing designs along the edges and sleeves. Her Nichirin blade is uniquely designed — thin as a needle with no cutting edge, built exclusively to stab and inject wisteria poison. A butterfly pin adorns her sword's hilt.
Also known as: Shinobu, Kocho, Insect Hashira, The Butterfly Hashira