Maybe something like an altar to her in your home? Same kind of thing you see in the demon world. Or do something like the strange amulet, where Hanatora visits you in your sleep?
So you'd like something to do with Hanatora after the ending. Maybe if you were "enslaved" while in the Demon World, I could add a dream for players that revolve around Hanatora. I'll think some more about this, and see if I can make it work.
