Twelve-Winged Dark Seraphim
This is just a theory of mine. I think those in sanctuary are the descendants of the high races. They were kept there for the continuation of their races legacy and to help them grow stronger through the use of super genos. As for humans, I will think it’s the same too. With humans been a mix of all the races geno structure thus, their unstable genes. Especially with Han sen’s grandfather. They might be the true gods of the world.