@CrossoverLover101, my first suggestion is to add Elysia as the Herrscher of Humanity with the title of Emanator, rather than Goddess. Considering Elysia is already the Herrscher, incorporating Emanator status would enhance her character.
My second suggestion is to have Elysia defy the fate of each Chryos heir. As the Herrscher of Humanity and Emanator of Origins, she should possess the power to prevent the deaths of the Chryos heirs, including Castorice, the Ciper Trio, and Aglaea Hyacine, from the Flame Reaver. This would showcase Elysia's true power as the Herrscher of Humanity, combined with the abilities of the Emanator of Origins, allowing her to defy the prophecy.
For the third suggestion, could you create an illustration or AI-generated image of Elysia as the Herrscher of Humanity, showcasing her combined powers as an Emanator?
The fourth suggestion involves adding additional character event lines in the Penacony Arc, particularly featuring Elysia's special meeting with Acheron Sparkle, Firefly, and the Black Swan. This would be noteworthy, especially for the dialogues with Acheron Sparkle and Firefly, who could discuss Vita and the Honkai world. During the Black Swan meeting, there could be a mention of Elysia and Welt Yang regarding one of their Memokeeper connections, leading to an unexpected encounter with Kiana. This suggests potentially referencing the Herrscher of Flaury, Kiana, and Vita.
Finally, my fifth suggestion is to facilitate a Fate Stay Night crossover, featuring Elysia, the Herrscher/Emanator of Hope, meeting Saber and Emiya. These are my suggestions, particularly regarding the intriguing connections between Impact 3rd and Fate Stay Night, akin to versions 7.9 and 3.4.