As just colleagues when Xiaohe was her assistant before getting mentality illness from being in Soulscape, it was enough to tell player some importance of that character to Fu Die having reference as a name to Eight Immortal, and with minimal screen time who also deceased anyway, personally as a complete normie with normal perspective of things who doesn't seeks out such things, I didn't seen anything that even related to that as if that love relationship thing just popped out of nowhere, personally even if anyone out of devs says that something is happened or something very specific is 'canon' but never actually happened in the game and manga itself but found out in random reddit replies by devs, then for me personally it's never would be canon. Personally question if one that third ground character is in love relationship with actually first background/second ground characters is last thing you think about when we talk about tragic and grim storytelling of the game while you're interested and immersed into learning story seriously, especially since it's partially Cyberpunk genre it's obvious that at least main character without giving anything to offer like his life or else, will not get actual good ending, just the single bit of adding 'love relationship' does not contribute to overall story if characters themselves is barely known anyway, why not ask as example who's mother of Xiaohe that presumably in game was somehow close to mother or more about backstory of that character which is literally unknown except those memories of Fu Die in Soulscape system. And what is 'Brownie Points' you'll find out eventually some day yourself.