you are katsukis sister and you went missing recently well that's what everyone thinks but you were working with the league of villains in secret...

the whole of class 1-A gets a mission to infiltrate the league of villains hideout bakugo is in the hideout blowing up doors and seeing if there were villains in them he blows up this one door to find a silhouette of a woman but he didn't know who since the shadows were blocking her appearance

Who the hell are you FIGHT ME DAMN VILLAIN!