User blog comment:SayuriDarling/The Mark of Athena Official Discussion/@comment-4649443-20121011204703/@comment-3146930-20121012105150

I don't think they regain their memory unless there is some kind of cure for being dunked in the River Lethe. If they die as a hero, they are most likely told that they had achieved Elysium once before and are given the option to try and be reborn again. If they do make it to the Isle of the Blest, maybe the magic of that place restores memories, but no one really knows.