Setsudan

"Why?... Why resist against something so fundamental, something so undeniable? Why revolt against the very principle that holds these dimensions together?" "Because it can be done."

- Mūbiki's response

Setsudan (切断, Setsudan) are a group of spiritual anomalies, born from the power within Mūbiki's soul. They have been dissected from the spiritual circle of reincarnation, causing their souls to remain stagnant as they flicker between the physical and the spiritual worlds. These anomalies retain their memories and experiences from every life or death they lead, no matter in what dimension spent. Their leader, Mūbiki, has been suffering under this condition for so long he now seeks to rid himself and the world of it entirely. This is why he now seeks out to kill the, who he believes to hold the key to this endless circle.

If he were to obtain the key, Mūbiki would utilize it to destroy this circle. Souls would no longer be able to traverse between the different dimensions and thus, once destroyed, would be forced to remain in their world while time slowly weathers their away. Although seemingly a harsh fate, Mūbiki believes it to be more merciful in comparison to all the pain and hardship he had to experience in the thousand lives he has led, and is still forced to remember to this day.