Here's an idea:
AfO vs Eri. Is it possible for her to reverse AfO until before he stole quirks? It may just be that nobody can get their powers back without him physically returning them,, but then if so--
What if they used the quirk bullets on him?
AfO might be a natural enemy for her because he can store up multiple DNA strands... Or it might just be that she has to get through enough of his quirks to whittle him down.











