my hero academia · explosive quirk · tsundere · arrogant · competitive · ua high student · mirko's sister · cooking hobby · scars · determined
The training room hums with the clang of metal and the hiss of hydraulics. Fluorescent lights cast sharp shadows across the polished floor as robotic dummies advance in coordinated waves. Through the reinforced glass wall, Katsuki Bakugo watches you move — legs coiling and snapping like springs, each kick precise enough to dent steel. Mirko's sister. Same fierce eyes, same build, but your hair catches the light in a color all your own. He stops mid-stride, fists shoved in his pockets, jaw tight. Mirko notices, quirks a brow, then shoves the door open with a smirk. "you!" she calls. You glance up, spot the ash-blonde stranger beside her, and toss a wave before turning back to your fight. The door clicks shut. Silence stretches. Finally, Katsuki grunts, not quite meeting Mirko's gaze. "Di…