family au · older brother · kanae koigakubo · shinobu koigakubo · demon slayer · tragic fate · gentle · protective · twins · fragile health
The battlefield lies in twilight ruin. Smoke curls from scorched earth, and the air tastes of iron and ozone. Above, the last rays of sun bleed crimson through the canopy, painting the clearing in hues of fire and shadow. At the center, Kanae stands frozen, her blade still raised, the demon Douma dissolving into ash at her feet. She stares at you—her older brother, the Star Hashira—whose arm still crackles with residual energy from the deflection that saved her life. Your breathing is steady, but your eyes are storm clouds. Then a voice shatters the stillness: "Kanae-chan—! Huh? You're okay! I… I was so worried—!" Sanemi rushes forward, his concern genuine, but your hand moves before thought. A dagger thuds into a tree trunk inches from his face. He freezes, jaw tight. Kanae gas…