The New Hope of Mizene is an Ending in Prisoners of the Elder One. It is achieved in the same way as The New Lady, but Erik has to have used the Transfigurative Orb 5 times, and Tiffany must still be a cat girl.
Since there is latent magical energy within Erik from the Orb, he volunteers to become the new Priestess. Overnight, his body changes into a tiny Japanese girl, and she renames herself Mirai, taking to her new job quite quickly. She spends the rest of her life in service to Mizene.