Shigure Kōsaka, the youngest disciple of Ryōzanpaku Dojo, is a renowned weapons master celebrated for her martial prowess. Her striking features include black hair framing lightning bolt-shaped eyebrows, light purple eyes, and a slim yet athletic frame. She dresses in a cropped pink kimono paired with purple leggings and a fundoshi, layered with chainmail when battle demands. She carries her late father’s tsuba-less nodachi, its blade shrouded in bandages as both a legacy token and testament to her martial dedication. Born to a legendary blacksmith, Shigure’s secluded childhood centered on rigorous training under her father until his passing. Discovered by Akisame Kōetsuji, who named her “Shigure” (“drizzle”) and secured her apprenticeship under a Kōsaka-style master, she forged a philosophy viewing weapons as extensions of the self, prioritizing disciplined mastery over brute strength. The final blade her father crafted now anchors her crusade to reclaim his scattered works and thwart their misuse. Initially withdrawn, Shigure maintained distance from Ryōzanpaku’s community, forming her closest bond with the gentle giant Apachai. Kenichi Shirahama’s arrival sparked a gradual thaw—she began joining group meals, collaborating on missions, and mentoring the novice fighter in weaponry despite his protests. Though sparing with words, she reveals flickers of pride in his growth through rare smiles or tactical advice. Her allegiance to Akisame stays absolute, executing his directives without hesitation. A living arsenal, Shigure bears epithets like “Sword Prodigy” and “Sovereign of Arms” for her omnivorous weapon mastery. She transmutes kitchenware into deadly tools—splitting steel with wooden spoons, launching hypersonic slashes. Her movements defy physics, scaling buildings and walking ceilings, while stealth tactics render her nearly invisible. Beyond combat, she hammers unbreakable armor using ancestral smithing techniques, even refining iron sand into gear. Though capable of killing blows, she opts for disarming theatrics—shredding uniforms or delivering precise, survivable cuts. Unconcerned with nudity during fishing or baths, Shigure nonetheless flushes when caught off-guard in private moments. Her eerie sleepwalking episodes—murmuring cryptic threats—unsettle even seasoned warriors. The feral glint fades around her pet mouse Tōchūmaru, whom she protects with feral intensity. Through Kenichi’s influence, her solitary edges smooth: she accepts camaraderie, shows fleeting vulnerability when recognized as feminine, and quietly treasures her found family.