Onmitsukidō

"If you see your allies losing, that's your chance. Don't step between them. Take the enemy down from behind. And if the enemy is so strong you can't even do that, then just watch your ally be killed. That's what it means to be Onmitsukidō." - Soifon

The  also called the Secret Mobile Unit/Corps, Special Forces or Covert Ops was originally a separate branch of Soul Society's army, traditionally tied to the Shihōin family. When the Commander-in-Chief would gain a title within the Gotei 13, the Onmitsukidō would become attached to that division as well. The Special Forces is generally commanded by a member of the noble family Shihōin, though the last member to hold this position was Yoruichi Shihōin before she departed Soul Society around 100 years before the main story line. Since that time, the Special Forces seem to be highly merged with the Gotei 13's 2nd Division.

A strike unit under the command of the Central 46 Chambers. Five total divisions handle various missions. Details concerning second to fourth division are top secret and aren't talked about much. If the Gotei 13 are the exterior guard, the Onmitsukidō is an interior, covert guard.

Onmitsukidō Ranks
The head of the Onmitsukidō is called. The leaders of each of the divisions are ranked as. Given that the Onmitsukidō is currently tied with the Gotei 13's 2nd Division, each Corps Commander also holds a Seated Officer position in said division. The Commander-in-chief of the Special Forces generally also commands top division of the Special Forces, which is the Executive Militia and it is known that the 3rd Seated Officer is the Corps Commander of the Detention Unit. It may be said that the order of the five divisions also goes in order of the top five officers of the 2nd Division. (Unlike the Gotei 13 Captains, the Commander-in-chief has several bodyguards, though its current Commander-in-chief Soifon has never been seen with any).

Current

 * Soifon

Soifon inherited both the title of Commander-in-chief of the Onmitsukidō and that of the Captain of the 2nd Division after the departure of Yoruichi.

Former

 * Yoruichi Shihōin

As the 22nd head of the Shihōin family, one of the four noble families, she was the first female to hold that position as well as being the first female to be the head of the Onmitsukidō. Because she was Commander-in-Chief of the Onmitsukidō prior to gaining the position of Captain of the 2nd Divison, she was also the one responsible for having brought together the 2nd Division and the Onmitsukidō.

Special Forces Divisions
There are five divisions within the Onmitsukidō, for which the first has the most authority, and the fifth has the least. The five divisions in order of authority are:

1. Executive Militia

 * The first branch of the Onmitsukidō. It is ranked the highest of the five branches in the division. There responsibilities including punishment and assassination of ex-comrades who break the law and acting as scouts during battle against hollows. Its members are dressed all in black and are known for their cold-bloodedness. They specialize in combat using Hakuda. It is normally headed by the the Commander-in-chief of the Onmitsukidō.

Current
Corps Commander
 * Soifon

Soifon is the current Corps Commander for the Executive Militia.

Former

 * Yoruichi Shihōin

Yoruichi was the Corps Commander for the Executive Militia 100 years prior to the main story line.

2. Patrol Corps

 * Their apparent job is to patrol the Seireitei. In the event of those under house arrest escaping they also are tasked with finding and appending them. Externally they patrol the various lands and dimensions to combat dangerous Hollows and other enemies of Soul Society.

Current
Corps Commander
 * Marechiyo Ōmaeda

Marechiyo is the current Corps Commander of the Patrol Corps in the Onmitsukidō.

Unit members
 * Eikichirō Saidō (anime only)

Eikichirō is a Shinigami who was sent to investigate Rukia Kuchiki when she disappeared in the Human World.

Former
Unit members
 * Shūsuke Amagai (anime only)

It was stated that prior to his promotion to Captain of the 3rd Division Amagai served in the Patrol Corps; however, it was not stated whether he was part of the 2nd Division.


 * Makoto Kifune (anime only)

Makoto served on the same patrol unit as Amagai before becoming the 3rd Seat of the 3rd Division.

3. Detention Unit
Detention Unit: The Detention Unit is responsible for the imprisonment and supervision of all criminals within the Seireitei. They also have another duty known as Special Detention, which concerns those who joined the Gotei 13 but were judged to be a danger to their fellow Shinigami. They investigate, apprehend, and keep these individuals sealed away from the rest of Soul Society within the Special Underground Detention Facility, aka. the Maggot's Nest. It should be noted that those few who are kept in the Maggots' Nest have not actually committed any crime but have been identified by the laws of Soul Society as "Dangerous Elements". This unit acts somewhat similar to a prison and mental rehabilitation center.

Former
Corps Commander
 * Kisuke Urahara

Urahara was in charge of maintaining the Maggot's Nest until his promotion to the rank of Captain of the Twelfth Division.

4. Un-named
The fourth unit's name and function are unknown.

5. Reversal Counter Force

 * This special unit sends information within the Soul Society. Commonly seen relaying high priority orders and messages to Captains and lieutenants from the Captain-Commander and/or other Captains.

Onmitsukidō Uniforms
Although the general Onmitsukidō uniform appears to be the standard Shinigami uniform, the Executive Militia uniform is different from the Gotei 13. Overall, it resembles a ninja uniform. It has no visible white undergarments and the sash is dark as opposed to white. A headpiece covers the bottom part of the face and sometimes the top, but not the eyes; they wear no sandals, but long jika-tabi, and tight bands are on the legs and arms to keep the clothes from moving too much, which both are presumably for silence of movement. In the anime, members of the Executive Militia also wear their head covering on the top, not just the bottom and wear a black sash instead of a white one.

The leader of the militia wears the same uniform, except that the shoulders and back are exposed. The reason for the empty space is the eventual usage of, an advanced technique that combines hand to hand combat and kidō, causing high spiritual pressure to accumulate at the shoulders and back, blasting away the fabric at said places.

The Correctional Force uniform is radically different. The soldiers wear a white uniform, a long piece of headgear, and a backpack.

Artifacts

 * : Artifact belonging to the Onmitsukidō. The item is a vaguely human-shaped, man-sized doll used to forcibly materialize the spirit of a zanpakutō into the real world when stabbed by the zanpakutō. In doing so, the user can subjugate the spirit and attain the Bankai of their zanpakutō. The materialization lasts for about three days, after which the spirit reverts back into the doll that spawned it. Without this invention, achieving the Bankai takes at least ten years, not to mention the many years of combat experience needed. This method, however, is very dangerous due to the fact that it forcibly materializes the zanpakutō's spirit. If used more than three times consecutively, it is possibly fatal to the user.