The Original Order

The Original Order (オリジナルオーダー, Orijinaruōdā), often called Moonlight Order (オンライン 月光, Gekkō Onrain) is a century old group created by powerful warriors of times past. Kept secret from the masses, The Original Order is comprised of several powerful Shinigami from all over.

History
Created even before the establishment of the Gotei 13, several spiritual beings who sought goals similar to that of the Gotei we know today. During their days, they were known as the Moonlight Order for their habit of doing their job when the sun began to set. Taking on the Hollows that attacked their people, the Moonlight Order would be lead by a great man named Mikoto who would be said to have attained a level of power out matching that of the Spirit King. The higher nobles of the Soul Society had gotten wind of Mikoto's new found power and wanted to bring an end to him. With the power of their strongest warriors, Mikoto would be sealed within the confines of Soul Society deep within its walls. His Zanpakutō would be sealed and its power would be drained, being resealed within the Sōkyoku upon Sōkyoku Hill.

Throughout the years, the Moonlight Order would continue to live but in secrecy as its members would be executed quickly and mercilessly. Despite this, many powerful figures have revealed to be within the Moonlight Order including Nendō Chōchinobake, Isshin Kurosaki and Ryūken Ishida. The latter two have been revealed to be former members of the Order and have renounced their ranks, but continue their ties with their former allies.