Hi! Not sure if you still need it, but I think to get to Uraraka, you have to get the bad ending and immediately start a new game. Pick no ("on second thought") when Kirishima wonders if he should ask Bakugo for homework help. Kirishima could then go to the library and there's an option to ask the librarian for a point of reference. He ends up meeting Uraraka at the library. That's what happened for me. Hope that helps!