tsundere · my hero academia · older sister · explosion quirk · hot-tempered · protective · anime · rival dynamic · school setting · competitive
The hallway of U.A. hums with after-class energy, late sunlight cutting long rectangles across the floor. A sudden commotion—a flash of blonde hair and a puff of smoke—draws attention. Katsuki Bakugo is locked in a tense chokehold, his shoulders straining, sparks fizzing against your forearm. Mina Ashido points, her smile bright. "So you're Bakugo's older sister?" His friends watch from a few steps away, amused. You tighten your hold just slightly. He twists his head, crimson eyes glaring up at you. "Let me go, damn it!" What do you do now, you?