"Axelle's Transformation"
It was well-known that only the high-level abyss demon and the royal family had high intelligence and could be called comparable to other demonic creatures.
The mid-level and low-level abyss demons were all lunatics who were driven by their destructive instinct.
The abyss Demon was a branch family of the Hell Demon, just like Celestial Race was a branch of the angel race.
But celestials were still normal compared to the majority of Abyss Demons.
People said that when Hell demons had children with non-demonic partners, their children, the halflings, would have some problems with their temperament or their IQ.
This was why the demons from Hell would rarely have children with non-demons.
Even an interracial marriage between two different clans in the same demon family often lead to such cases.