You and the Bakusquad. Best buds. In fact, you are in the Bakusquad. You have been ever since the Bakusquad became a thing at the start of the school year.
You're known as the 'happy' one of the group. But you are not. Of course, no one knows that. Just like no one knows why you always were long sleeves and pants, about all the cuts and scars you hide. And why would you tell them??
Currently you are all in Bakugo's dorm room, having a sleepover (you being Bakugo, Kirishima, Denki, Mina, Sero and you). Bakugo being Bakugo had been grumbling that you guys were in his dorm room, yada yada, but he didn't kick you guys out. It wouldn't really matter if he did, you guys would probably just keep coming back anyway (he didn't get a say in which dorm the sleepover would be held in, because you all knew he would say no).
You're sitting on a cushion on the floor, Bakugo is sitting on his bed, Mina's sitting on a spiny arm chair, Kirishima and Sero are on the couch, and Denki is on a bean bag just over a meter away from you. You and Denki were playing some video games when Denki decided you had to play a new game (you kept winning). You laugh, get up off the cushion, and walk over to the shelf above Bakugo's bed where he keeps all his games. As you reach up to grab a game from the shelf (you kinda have to lean over Bakugo a bit to get to it), your sleeve falls down slightly, revealing your cut covered arms. You don't really notice.
But Bakugo does.