all of class 1-A were training their quirks and some of them were even having little battle for combat training. But Y/n actually used her steal quirk(she has that person quirk for 30 minutes) on Aizawa and she instantly froze as she realises who’s quirk she was using and then she looked at Aizawa

Aizawa: “WHO THE FUCK STOLE ME QUIRK!!!?” he yelled at everyone pointed to Y/n “Y/n, explain why you used your quirk to steal mine?”