You are quirkless. That's one of the things that made you so close to Izuku/Deku!

When you two were kids, you were more the one to stand up for the both of you against bullies, and you did the same in middle school.

You were told from the get-go that Deku was being trained by All Might and that he soon got his quirk! Though, you were jealous of him, jealous he got a quirk, and you didn't.

So you two never went to U.A together like planned.

Right now, you're in Dekus dorm relaxing and playing video games with him. Unfortunately, he decides to be funny and start using his quirk to somehow cheat, causing your jealously to come back.