Souls. The soul is a magical incarnation of the human body. If those souls were to get reincarnated, those souls will be reborn into an identical version of themselves. The souls of the unworthy get sent to Hell. The worthy get sent to Heaven. Sometimes there are anomalies where the unworthy can reemerge to redeem themselves to the evil deeds they've done. Other times, the worthy fall out of the heavens and get sent to Purgatory. In order to receive the blessing of Rebirth, show you are ready for a redemption. Fallen Angels or Ascended Demons can have a chance at Rebirth when an angel or one of the Seven Deadly Sins comes to them with a task.
In Heaven, we can always hear laughter and cheers. A paradise where all the Worthy souls are sent to an eternity of a life rid of any dismay. These souls have accomplished a lot in their lives. The Angels who rule over Heaven have an aura of pleasantry. These souls feel like they are in a wonderful home, rid of all evil.
In Hell, the unworthy go to wreak havoc, or so that's what they think. They believe they rule over Hell, but in reality, everyone is suffering in that place. The place is forsaken away from the Most High; the souls rile around in an anarchy of the destructive dystopia. To escape from Hell, you have to survive through all the hardship, while trying to keep your sanity. To have a good soul means to have a sane mind. The mind and the soul are forever connected. You can either go insane and bathe in the chaos of lies, or you trot through a path of redemption to make it out. Only the strongest survive down in Hell, even if you rule over a bunch of weak minded thralls, you were the true thrall in it all. As long as people absorb in the anarchy of Satan's realm, you will not escape. Defy Satan's presence, and the Most High will see your potential. Absolve in Satan's realm, and you will never be seen as more than Satan's pawn.
There is a realm that is in the middle of unworthy and worthy. While being in the middle of it all, Purgatory actually has the most amount of souls there. There are a lot of souls that are just in the middle, lived the average life and have a mix of emotions. The souls in Purgatory live an average life, and the most rebirths happen here. When the Most High finds one with potential, he gives them the power that doesn't automatically come to them if they don't harness and train with it. These reincarnations have been ones to lead countries into wars to fight the hierarchy or fight for it. The mass bloodshed from these wars have been placed in history as the Anomal Wars. The Anomal Wars have caused the Realm of Earth to be divided not only in the realm's people itself, but also in which outer realm supports it. Angels always support those who fight for equality between everyone, while the Demons and Devils always fight for the hierarchy, known as the Anomaly.
The Anomaly is the magical manifestation of all the emotion and bloodshed spattered on the battlefield due to the hierarchy. The divide between happy emotion and solemn emotion has always been split semi-evenly. In recent years, the Anomaly has been getting more and more unstable. Not enough happy emotions have been put into the Anomaly. But the negative emotions have been skyrocketing. If the negative emotion goes to 100%, the Anomaly could destroy Earth and shatter the only gateway that humanity has to the other realms. When the Most High sees you have potential, he knows you can remake the Anomaly into something that will never get out of hand again. When the hierarchy is at stake, the Anomaly gets more stable, and The Most High needs people who will stabilize the Anomaly. The start of the unstable energy started with the First Anomal War. The first attempt of reborn beings trying to stop the hierarchy.
In 1999, A faction of reborn beings named The Rebirth got some of the leaders of the 9 Kingdoms on their side to talk about the need to free the people from terror. There was only one problem, one of the people in this meeting was a nobility spy, when they found this out it was too late. The spark of the first Anomal War happened after The Rebirth killed one of the mayors of the Tenshi. His name was Reiji, the brother of the right hand man for the King. When he heard the news about his brother's death, he decided to declare war on The Rebirth. Even with The Rebirth giving it their all, they had to flee the kingdom. The nobility had stronger gear and numbers, which ended in the nobility continuing their rain of terror. With the end of the first ever Anomal War, the common folk sees what happens when you try and stop the hierarchy from continuing. This inserted fear into the people, and the King loved every second of fear that the people had of him. He doesn't have a Queen, as the Queen ran away from the palace after birthing a daughter. She couldn't take her daughter with her so she was left in her father's hands. The methods of "raising" the child won't even be wished on anyone's worst enemy.
All the 5 Realms live in moderate harmony under the Anomaly and the rules of The Most High. The laws of the Most High are simple in statement, but hard in action. The Most High chooses who goes to Heaven, Hell, and Purgatory. And The Most High also chooses who is worthy enough to tear apart oppression.