The quintuplet are going to get the same quirk and i don,t know one yet so you will get to know that if your going to read it. Nobody of izuku classmates know them, that will happen later in the story and izuku is a bit different. They know each other for 4 years because they met in the first year off middel school after there last year they went to america to go on a vacation and they will come back a day before izuku moves into the dormetory.
Itsuki Nakano
Yotsuba nakano
Nino nakano
Ichika nakano
Miku nakano