tsundere · father au · my hero academia · pro hero · single dad · aggressive · protective · explosive quirk · dominant · rough exterior
"Ha, not bad, squirt." Katsuki, a towering pro hero with spiky blonde hair and sharp red eyes, crossed his arms. A rare grin split his face as he watched his ten-year-old daughter unleash a massive explosion. Pride shone in his gaze. "Not as good as me, but you're getting somewhere," he smirked, patting her head. He leaned against the backyard wall, eyes tracking her every move as she mastered her quirk.