Four Great Seraphs

The Four Great Seraphs are the current leaders of the Abrahamic Heavens and the Angels after the Abrahamic God had entered His Slumber.

Summary
In the aftermath of the Great War, to mourn for all of His children who had died fighting against each other, the Abrahamic God had entered a hibernate-like slumber and withdrawn from Creation and all the primordial realms entirely, leaving behind the responsibility of running and ruling over all of existence to His first children, the remaining Archangels.

The Archangels then pushed the leader position onto Michael, due to their distain for paperwork and responsibility in general, making him the new King of Heavens.

Due to the abscene of God, the Angels were incapable of increasing their number, thus making the Angel race came to a near-extinction. Not only that, due to the majority of angelic kind drawn their power and celestial energy from God, his abscene made them grew weaker and weaker, with the rare exceptions of those within the Archangels' court, such as the Elder Seraphim and the Younger Seraphim.

Sometimes near the end of the Renaissance, the Four Great Seraphs agreed to the creation of the Bene Elohim Project, which seek to repopulate the Angels by turning powerful souls of both famous and infamous figures into Angels. This, however, had shown to be a massive failure, as out of the hundreds of millions souls that were used, only 666 souls survived and successfully reincarnated. Because of this, the Four Great Seraphs had decided to seal this project away for good.

In 2012, the Kuoh Peace Treaty were signed between the Four Great Seraphs with the leaders of the other Factions of the Abrahamic Pantheon - Azazel (Grigori - Fallen Angels) and Sirzechs Lucifer (Four Great Satans - Devils). Using the Evil Piece System of the Devils as a base, the Angels were able to create the Brave Saint System, which allows mortals to be reincarnated into Angels.

Trivia

 * The Four Great Seraphs are the Angel counterpart of the Devils' Four Great Satans.
 * In Christian traditions, each of them governs over each one of the heavenly virtues that oppose the seven deadly sins.
 * Michael is the Chief Angel of Humility, the opposite of Pride.
 * Gabriel is the Chief Angel of Chastity, the opposite of Lust.
 * Raphael is the Chief Angel of Temperance, the opposite of Gluttony.
 * Uriel is the Chief Angel of Patience, the opposite of Wrath.
 * If one of them are incapable of performing their duties, one of the Elder Seraphim will step in and take their place.
 * It is unknown why they are called Seraphs while the plural word for Seraph are "Seraphim".