So I’ve seen a few people on here talk about Eri’s quirk saying it’s too OP and that it breaks the story or that she can heal so and so…
But I don’t think that’s how her quirk works at all.
What we’ve seen so far is that she needs physical contact to activate her quirk. But what some people are forgetting about her rewind quirk is that it doesn’t seem to stay permanently rewound.
Deku broke his legs, so Eri rewound them to right before they were broken.
BUT THEN THIS HAPPENS!
Deku’s injuries reappeared! So that means Eri can rewind someone to a certain point back in time, but EVENTUALLY they’ll revert BACK to the state they were in before she used her quirk (only if they’re still alive). I think that’s the limit of her quirk, whoever she uses it on will eventually go back to how they were before. In the case of her father, he probably was rewound to a fertilized egg or single sperm which would be almost impossible to see with the naked eye and most likely died being in that state out in the open.
So Eri’s quirk wouldn’t be good for healing necessarily, maybe for emergencies to stop someone from dying until they get actual medical treatment instead. Those are my thoughts.