Responses
I don't think he remembers tbh. If he did he would've pursued og Charlotte a lot harder and tried to change fate. He loved her more than he feared death after all.
My speculation is that the og Charlotte is the one who remembered the future/time reverse because of the holy powers within her and in her desperation for the prince's love she made a contract with the demon and switched bodies.
I have soo many questions like why did he stay with Charlotte when he knew she was gonna betray him?, does he still have his memories from before he went back in time? (Probably), why did he go back in time?!? Any we’ll see in due time.