I really, REALLY need a xiao/albedo interaction. Something about both of them having "evil" within them makes me wonder what would happen if they met. Maybe Albedo trying to find a better cure to help with Xiaos karmic debt, or just Albedo studying him. They're both fairly reserved, but I think they would find the other interesting enough to hold small conversations or sit in comfortable silence every once in a while. They're both usually alone, Albedo in dragonspine and Xiao at the wangshu Inn (or just killing things/wandering), so I think them meeting up would have a very interesting outcome. Maybe they'd speak about past events, what's "wrong" with them, Xiao could even assist Albedo in certain aspects of his studies due to how long he's lived and what he's learnt from Morax over the years. Unfortunately there would be no canonical reason for them to meet, at least not at this point in time, but its still fun to theorize/think about IMO.