Djinn.
It is a word that represents a supernatural entity in Islam.
However, it is also a term that is widely used in games and stories.
But most of them have different types of origins.
Some of them being a supernatural entity that grants wishes, some of them being a soul that is trapped in a bottle or a cup.
In this case, the Chronicles of Aeris went for a simple definition of this word.
Followers of demons and those who borrowed the power of a demon.
Djinn is a term that is used for such cases.
Since humans don't naturally tend to have Dark mana in their attributes, those who had this attribute would be associated with Demons most of the time, or they would go under a second awakening which I will mention later.
Now, why a person becomes a Djinn?
The answer is pretty basic.
Because of their ambition.
Ambition for power.
Just like this man in front of me, who sent his soul in return for power.