@TheFalseFury
Actually the mods have stated in the past on a few occasions that because the Anime category exists, individual tags like "anime, anime boy, anime girl," etc should not even exist.
As for my personal experiences, I have noticed that if something was originally anime, such as Dragonball Z for example, and someone draws a DBZ character in a deliberately Westernized fashion, it's not put in the Anime Category, and goes into General.
It would logically follow that for Genshin Impact, if someone uploads wallpapers that depict the characters in their original, anime style forms, they would be categorized as Anime, and all the wallpapers that deliberately render characters in an exaggerated, unusual, Western, or otherwise atypical form would fall under General. Because that's the system that everyone has been using for all the other stuff.