Lucifer was an angelic being that has fallen from Heaven due to misdeeds and attempts to take over Heaven and it’s plains for himself. After a battle with the Leader dubbed “God”, he was banished to the Demon Realms for his crimes (Pretty much he cannot get back into Heaven), in a Kirin being with some Kirin abilities (losing a decent chunk of his old abilities). After a few ages of being lost in the Demon Realms, Lucifer bumps into a Demonic being known as Satan. The 2 battled each other until complete exhaustion. Realizing that they can’t kill each other, they decided to have a truce to take over Heaven. After a few more centuries, Satan has gotten stronger surpassing Lucifer. He decided to end Lucifer by using an ancient ritual of bonding 2 souls, making the 2 poor souls bonded by this to feel each other’s wounds. If one soul dies the other soul dies. Satan planned to use this ritual on God and Lucifer so there would be no contest for him for Heaven. But a small demon that was caged for the ritual experiments, escaped and bumped into Lucifer spilling every detail of Satan’s plan. He was enraged by the planned betrayal. Lucifer then decided to use Satan’s plan, but instead of using God, he decided to soul bond himself and Satan in secret, before Satan has successfully mastered the ritual. When Satan came to confront and kill Lucifer. Lucifer took a dagger with a grin and stabbed it into his hand, although Lucifer was in pain it made him grin that Satan was also in devastating pain too. Satan then backed off in disbelief on how Lucifer knew of his plan. After some negotiations, Satan decided to show Lucifer the exit out of the Demon Realms. At the exit there were some Angel guards waiting there. Lucifer then explained his story and the Angel guards then got their commander, who called God down over there about the situation. That Lucifer can walk on the mortal plains thanks to him catching Satan in an act of attempted God Slaughter. But Lucifer has to keep in check of the people’s Sin’s at which area he’s at as well as sending at least a demon or sinner back into the Demon Realms a year. To which Lucifer agreed to as long he gains back some of his original powers. Which everyone was okay with as long as he was not allowed to manipulate his own appearance aside from what abilities Kirins are given. Which Lucifer also agreed too. With the deal settled, Lucifer now walks among the mortal plains. Under the guise of “Lucian”.