Heaven

Heaven is the holy realm ruled by God. There are three "sub-realms" or regions in Heaven, Sanctus, Eden and God's Throne.

Eden
Eden is a spirit side in the Heaven that all the deceased but pure souls are sent to after their death. Physical projection of the Tree of Life exists in Eden. The tree itself is ethereal and exists in the spirit realm in Other-Realm. Cherubim are the guardians of Eden.

Sanctus
Sanctus is a realm in the Heaven that belongs to the heavenly army, army of the Heavens. King and commander of Castle Sanctus is king Loyas. The army of the heavens exists to prevent Hell from spreading to the mortal realm.

God's Throne
God's Throne is an exclusive realm only for God. It has no normal access to it. Only God, the Seraphim and others who work directly under God like the Divine One and the Holy Trinity can enter God's Throne. It is unknown what exists in there, as it's forbidden for even the Seraphim to tell.

Proto-Heaven
Proto-Heaven is the opposing force to Proto-Hell and exists to prevent it from spreading too much. Proto-Heaven is the first stage of Heaven born in the Other-Realm, and it gave birth to Heaven when Conquer spread Hell onto the mortal realm.