Demons really do exist, but not in the way you have been brought up to think. To be a ‘Demon’, a colloquial term, you must be a Dëymosþan, the desert people of Trótskarr, where women cover their faces and men don't. While this seems normal to us, in Tam'nýer—a' this is extremely strange as the majority of the world is matriarchal. However, this tribe of desert people couldn't care less.
While the women seem demure and hidden and the men indulge in heavy smoking, the women are the only ones who are permitted to drink alcohol. It is said that it is to keep their hearts warm and babies cool, as women are viewed as vessels for malevolent and powerful spirits.Alcohol is a prized commodity to the Dëymosþan who are assumed to in fact a tribe of mixed Human and Z'sa'Ză-'Bäa people (though a rare handful of these peoples seem to have horns). So, to keep up their women's health, and to keep the spirits they house amicable, every drop is reserved for them.
Women are powerful because they are living vessels for wild spirits that the tribe pays homage to. However, despite this, the men are the spirits’ shepherds, to satiate them through this life, and therefore, ultimately, the spirits (and the women that house them) are in an odd subservience.
This is due to the fact that they need to them to care for them so that they do not wreak havoc on the world around them. This is also why the women are veiled, to not give the spirit's freedom to be seen entirely. The only time a woman is permitted to be unveiled is when she is mating with her shepherd.
Men assert dominance amongst themselves through racing strange animals that seem to have the thin face of a dragon and scales that resemble boulders that are called Káñonbahár. The men, to support their tribe and way of life, work as teams raiding caravans and crops. Some even stake out Makus-vibum to pilfer bodies and grow their livestock numbers.
The Dëymosþan have their own language which they only speak amongst themselves, where inflections or disapproval is signaled by the various tones of sucking on one's tongue and flicking it in the mouth.
They are considered demons because of the survivor stories that float around their cruelty when raiding, and tall tales of seeing their women writhing and dancing in firelight from afar in the middle of the night paired with the howling that comes from their camps.
With Tam'nýer—a' being an older planet, its species have had to adapt or be killed by the difference of habitat and climate. The Tèrre-vănș, once the most prominent race across Tam'nýer—a', are now extinct.
Only relics of their settlements, as well as genes remain. The Tèrre-vănș gave birth to the now modern Khah' & Z'sa'Ză-'Bäa species, with a noticeable diminish in the fur department, as the planet has been making a shift to more of a rainforest & jungle environment on land. Over millennia the suns surrounding Tam'nýer—a' have aged, thus heating up the planet slow enough to permit successful evolutions. Although, why exactly the Tèrre-vănș died off is unknown.
For the Tèrre-vănș the world was semi-glacial, mountains and tundras. Well equipped with fur, heavy long tails, and large ears which gave them an advantage in hearing prey as well as predators, they suited this seemingly barren land. It is speculated that despite being an ancestor race their diet was much like that of those living in Tam'nýer—a' today relying on the bountiful oceans.