As for why Orsaga had reincarnated as an abyss demon.
That being did not particularly care.
After all.
There were simply too many possible reasons to count...
Being thrown into the Bottomless Abyss by some other being, falling into the Bottomless Abyss through sheer coincidence, and all sorts of other external influences...
Besides.
Reincarnation itself was hardly anything unusual...
Take Orsaga, for instance.
Under his command alone, there were already more abyss demons reincarnated from humans than anyone could count...
Some had managed to preserve a portion of their sanity.
Some had descended into utter madness.
Others had completely lost the demonic nature of abyss demons and were essentially humans wearing demon skins...
There were even some demonic saviors biding their time in Crimson Heaven, enduring hardship in hopes of backstabbing Orsaga and saving certain stretches of spacetime from him...
As for that.
Most of the time, Orsaga took an attitude of indifference toward it all.
He calmly watched to see what tricks they could pull off to entertain him...
Overall, all one could say was this.
The allegiances reincarnators chose in their previous and current lives each represented a different path.
And across the entire Bottomless Abyss.
The number of such fellows.
Was even more impossible to count.
After all.
The Abyssal Will did not object to other species reincarnating as abyss demons.
Just as it never refused outsiders entry into the Bottomless Abyss.
Even if they made it perfectly clear that they had come to cause trouble, slaughter everything in sight, reap an easy harvest, or kill some abyss demons for raw materials... it made no difference.
The Bottomless Abyss had always been right there.
As long as they were not afraid to die.
They could come whenever they pleased.
Even treating it as their own home was