What did Eri do to Mirio?

Mirio covers Eri as the Quirk destroying bullet is shot into his body which begins destroying Mirio’s Permeation.

Does Mirio get his quirk back?

Eri does manage to restore his Quirk My Hero Academia fans breathed a sigh of relief when Mirio Togata finally restored his Quirk. Right before the Paranormal Liberation War, Eri was able to use her Rewind Quirk to restore Mirio back to his old self.