Royal Guard

The, also known as the Zero Division (Squad Zero in English), is made up of former Captains of the Gotei 13 who have been promoted to this level. Only captains of the Gotei 13 know of their existence and also former Lieutenant of the 8th Division,Vizard Lisa Yadomaru, and Rukia (Episode 14 shows her speaking about them). They are said to have considerable power and tactical knowledge. The Royal Guard are expert Shinigami that were promoted to protect the King. They are the highest class of Shinigami and only answer to the King, not even the Central 46 has authority over them. It is also known that they are meant to hunt Menos (Episode 14).

Members
All members of the Royal Guard are former Captains of the Gotei 13. Only one has ever been mentioned in the series, that being who was the former Captain of the 12th Division.