Sdrgau/general irl-fiction crossover/more on my idea about the differences between real people and people in fiction. Basically if someone irl ended up in something animated, they'd end up also being animated. Or in cases like sdrgau where two worlds meet, the more "dominant" world/the one with the stronger presence (for sdrgau, Teyvat) would override the information of the other (Earth), making us animated too. But since our bodies or whatever are more complicated there's still some differences.
For the sake of ease: they/the more specific Teyvatians can be thought of as referring to any potential other fictional universe people. Us is obviously us from this earth.
(I'll eventually make a post focused on the last idea specifically but it probably won't be much different than this one except for a few things)
Like I said in the first post about this kind of thing, because of how teeth are typically simplified, people from real life/our earth would have teeth that appear sharper because our canines are obviously not simplified away/only visible on people who have particularly sharp ones. So our canines would be more visible than theirs even in a simplified form
One that wouldn't be visible is that our brains aren't simplified/actually physically exist, which could make them way more complex. Dunno what effect this would have. In sdrgau potentially more adaptability or sensitivity to things like divine/forbidden knowledge
Ok back to the visible ones: I think that their skin would undoubtedly be smoother, but I feel like ours would be softer and we'd be squishier. Basically organic skin vs the feeling of a silicone mold or something (I imagine this would not help us be taken seriously in sdrgau scenarios)
Another is that their hair is, in most cases at least, is simplified into thicker pieces so ours would be finer. Probably MUCH finer. Which would probably make it lighter (so it probably moves more fluidly than theirs), softer, and fluffier
Also because of all the little flecks and stuff in our eyes, ours would appear much much deeper compared to most of theirs
Overall I think we'd probably either be very pretty, very uncanny, or a lovely mix of both even in styles that are closer to theirs
So obviously for sdrgau the genshin characters look like this
And when earth gets overwritten to be an anime-like style we end up looking something like a mix of these styles (not exactly what I was thinking but the closest examples off the top of my head)