As it were, each main 'dimension' having one primary sapient species made sense. The Overworld was home to the testificates, as... varied as they are, along with any rogues from the other two. Piglins reigned in the Nether, though that reign is no longer the netherite fist it once was with the population slowly recovering from an apocalyptic crash. The Enderians, or 'Endermen,' were what was left of the towering societies in the End, though their populations are significantly lower than the previous two due to the active deterioration of their home dimension.
Each group had their own cultures, their own quirks, the adaptability to survive- no, thrive in their own worlds, with occasional overlap for trading and the like. This made sense.
The so-called 'Players' did not.
It's hard to categorize these beings; they're as varied as the biomes around us, with very, VERY few consistent rules. They can be formed anywhere at any time, from nothing or from something. There's recorded cases of some of the native peoples 'ascending' to the rank of Player, though that process is not well understood. I intend on fixing tha I will be conducting studies on how Player status affects piglins us
The rules we associate with Players are not so much rules as they are assumptions, as some just simply don't follow these without much explanation. These rules are as follow:
They cannot die permanently. Not to say you can't kill one, but true Players will simply... come back. I have watched one be slaughtered by a hoglin then pop back through their entrance portal with not much reaction other than mumbled annoyances. This does not apply to people ascended to Player rank, though some naturally-born Players seem to also not apply.
As mentioned above, they can easily travel through all dimensions, though most seem to begin in the Overworld. This transfers to piglin Players, oddly enough, though that may be related to point 3.
They are immune to all forms of zombification. Unless they were a zombie that ascended, no Player can be zombified.
They draw ire. They are unsettling. Unless they are already established, a wandering Player is sure to draw conflict because their presence feels unnerving. They feel like a threat, even before they inevitably gather armor or weapons.
There is no basis for what they look like. Some look like the native peoples. Others look like the zombies but... not. Still others are oddly colored blobs, massive winged people who fly without the need of elytra, something completely alien, something that is a mockery of old, something that Is but Is Not-
Sometimes they look like
We don't know where they come from, but testificate ruins and ancient Enderian records reveal they've existed for a very, very long time, and I doubt they're going anywhere any time soon.