I just thought of this while watching spy x family stuff, and me being almost obsessed with genshin, I had an idea which is Anya as nahida. I also thought this was a sort of a good idea because they are a little similar to each other but also very different,
Like how Anya can read minds like nahida, there both physically children, and I guess being experimented on and being locked up is kinda (not) similar I guess(I'm also not up to the sumeru archon quest yet). And pls remember that this is an au and is (very) different from the original so don't tell me that this au doesn't make sense because, I KNOWW IT DOESN'T 😭(and pls don't point out mistakes)
Au: Anya ran away because Loid and Yor figured out each others secrets so she tried to run away as far as she could from them. Anya thought that they hated her now. Unfortunately she ran into the scientists who experimented on her and was brought back to the crappy lab.