God (神 Kami?) is an immeasurably powerful being of ultimate goodness and infinite love that created the Digital World and its laws, and is possibly a human. It resides within the Digital World's central "Kernel", which is protected by the Celestial Digimon and the rest of the Angel Digimon. The Celestial Digimon, Seraphimon, Cherubimon, and Ophanimon, were given the duty to execute God's enlightened laws, guard its wisdom, and impart its love and mercy, respectively.
Airdramon is said to be close to God, and Angel Digimon are positioned near to it, with Seraphimon the closest of them all, but because of that extreme, they can easily fall into the opposite extreme of "Wickedness". In fact, Lucemon and Daemon (while still a Seraphimon) instigated a failed rebellion against God, alongside many other Demon Lord Digimon, and were deleted to the Dark Area as punishment. Bagramon, one of the Demon Lords who took part, rebelled in rejection of what it saw as the "Unreasonable Justice of the World" that God had constructed, and so had the right side of its body ripped away as punishment. Although Bagramon would be forgiven if it repented before God, it refused to submit, and instead seeks to replace God's justice with its own "New Justice", the purpose of which is to banish God.
Digimon Adventure V-Tamer 01
Demon Castle was once the home of the God of Digimon, who had built the Digital World and ruled over it. Although he is depicted with a humanoid form, God hated interference from humans and sealed his castle from them. However, in case a situation arose that could not be solved by the Digimon themselves, God left the five V-Tamer Tags scattered across the Folder Continent, and made them so that monsters could not touch them directly. Although God has left the Continent, the seal on his castle still remains, and so MagnaAngemon sends Taichi, Zeromaru, and Gabo to retrieve them.