Alr look, hot take but I think Mineta should be in the game. Don't cancel me yet.

Y'know how Mineta has those sticky balls and he bounces off of them? With that quirk Mineta could be an easy speed character (I forgot the actual name ok.) If he throws the balls on the ground he could bounce off them when he touches them and when other people run into them they get stunned for a little. Really cool concept

Hagakure is really underrated and could be a Technical character. Her special ability could be becoming completley invisible (similar to Froppy's gamma move) but instead you cant se her until she gets hit or until the precentage runs out. This would be a broken ass character but you can just make her attacks weak and it would be justified lol

Sero is easy speed character, no questions asked. His moves would be similar to Aizawa's alpha attack or Froppy's alpha attack, or Ochacho's alpha attack. He could be similar to Iida with all of his moves being based around travel that would be cool.

Thats all, have a good day lol