My Hero Academia fans often want to know what Eri's power is, since that proves to be a major plot point throughout the series. It is because of her Quirk that the vast majority of the Overhaul arc ...
They produced these bullets using Eri’s Rewind quirk, which has the power to reverse time on anything, creating ammunition ...
If it's a quirk where you accumulate something and change it into energy, I can't copy what needs to be accumulated. Eri's Quirk is also limited due to its energy requirements, as her horn goes ...