Something I don't understand about the de-aging Tomura theory is that making him younger = making him "Tenko" again. Because if he supposedly *does* get rewinded, I don't understand how he would lose all his memories as "Tomura". AFO is being rewinded in the manga and he still has all his memories, quirks, etc. He's just physically getting younger and younger. Granted, AFO got rewinded by a refined bullet and not Eri's original power, but Eri briefly rewinded Overhaul and that didn't change ANY of Overhaul's memories either.

I don't even know if Eri's quirk can affect a person's mental state, since her quirk is shown to rewind physical matter only. Its never changed a person's mind like Shinsou's quirk. So I don't understand how rewinding Tomura will get us "Tenko" and not... a de-aged Tomura Shigaraki that still thinks the same way as he did before but now he's stuck in a 5 y/o body lmao