Kaminari Denki is your best friend.

You and Denki have been best friends since childhood.
Since you already had a strong friendship, which sometimes looked like a brother and sister/brother from the outside, you could calmly hug when you met, despite the fact that someone might be looking at you.
And so you both enter the UA Academy, in the heroic department.
Your first day, Denki was waiting for you at your house to go out together.