You know the drill- it's another chinese gacha set in the ambiguously sci-fi/cyberpunk future with an excuse for a single guy to command lots of hot...
Okay, I'll write the origin story, then. It might take me a few days to get it all done, mind you, but I plan to have it done by the end of the next...
I think she gets featured enough in Heaven's Feel to understand her as a character, at least. Of course, compared to the heroine boost she enjoys in...
Considering Mahoyo implies that Soujirou and Eiri come from a similar/the same background I could absolutely see it being expanded in some way shape...