also bc its dumb she suddenly just didn't need them in the game, sera 100% still wears her hextech hearing aids. While she is able to harness her powers and utilize the music for good and for a better cause, she doesn't get over being able to need her hearing aids to help distinguish between all the souls it helps make it a lot easier, and also provided her with some relief from the chronic music and rhythms that exist in the world to her, her brain just isn't wired to processes all of them at once and never will be wired to process them all at once so the hearing aids are something she will ALWAYS need and have to a degree when I write her. Plus i think its cute her dad, herself and the boys all made them better and help her more together as a lil team. That's fun lore.