This chapter shows the huge difference between good class A/B heroes and a class S. They are worlds appart even for one of the weakest PPP.
Nyan seemed not so strong against PPP, now he looks unbeatable.
I really don't know how the heroes above will deal with him and save the kid, but frankly if the little shit dies I will not be bothered one bit.
Maybe Nyan has a weakness or a badass citizen like Sonic or Shyriu or an other S class is nearby (Bang, Bomb, Genos, Metal knight etc)