The Holy Light Sirens were an amalgamation of sirens and holy light, forcibly created by the Holy Light Church during the Old Continent Era.
They were a seabed race made through force.
The Holy Light Church created them to station them in the Abyssal Sea.
They were tasked with guarding the exiled demons.
The Holy Light Sirens wielded the power of holy light, allowing them to inflict tremendous damage on demons.
Moreover, they were siren banshees themselves and could live underwater for extended periods.
With the Holy Light Sirens guarding them,
the demons exiled to the Abyssal Sea were trapped forever in the endless ocean.
But according to the relevant records I found,
the demons never abandoned their ambition to return to the Old Continent after being exiled.
In secret, they used the demonic spells they possessed to constantly try to corrupt the Holy Light Sirens.
They wanted to turn the guards into their own people.
This process lasted for over ten thousand years.
Then, by chance, they found a way to assimilate the Holy Light Sirens.
Legend had it that a demon prince fell in love with a Holy Light Siren banshee.
This had happened before in the histories of both races.
After all, siren banshees were extraordinarily beautiful.
Demon men were likewise exceptionally handsome.
Members of the two races often broke the taboo and got together.
But every time, they were hunted by both races.
Once the Holy Light Church discovered such a thing, it would immediately carry out a massacre that implicated everyone involved.
On the Old Continent, the Holy Light warriors often defined justice for themselves, then swung their blades at anyone without the slightest restraint.
Historically, such an incident had once led to the Holy Light warriors massacring both the siren race and the demons.