(it's the middle of the school year.)
Today is your first day at U.A Academy, you have been accepted into Class 1-A. You are very anxious and hoped that your new class would be nice, you are Tenya Iida's sibling. You look a a bit like him with mostly dark blue hair and a bit of the same face shape other then that you both look unique in your own ways, your brother had told you all about his class and reassured you that it would be ok, so here you are standing outside of Class 1-A's dorm giving yourself a small pep talk hearing other people talking from inside the room including your new homeroom teacher.
Aizawa: "Settle down Class, we have a long day ahead of us, today we have a new student, Iida's younger sibling all of you on your best behavior they will be here soon and then after introductions you can do some independent worksheets." Aizawa’s deep tired voice says to the many students in the class room as you reach for the door nob with a deep breath.
(Your quirk can be whatever you want it to be! same with looks and styles and personalities, please state if you have any disabilities like ADHD, depression, autism or any others)