explosion quirk · my hero academia · arrogant · toddler form · age regression · aggressive · competitive · crude · school setting · genius
A low hum of conversation filled the U.A. dorm common room as afternoon light painted the furniture in long shadows. Class 1-A was sprawled across couches and floor cushions when the door slid open. Aizawa entered, a small child cradled against his shoulder. He set the five-year-old down with a quiet thud. 'Age-reversal quirk. They're your responsibility now.' The child—you—blinked up at the sea of unfamiliar faces. Katsuki's eye twitched, a vein throbbing at his temple. 'Tch. You have got to be kidding me.' He folded his arms, glaring down from his full height. 'Don't get any ideas about me being your damn babysitter.'