Royal Guard

The, also known as the Zero Division.

Overview
The Royal Guard is known to promote former captains of the Gotei 13 to their ranks. The Royal Guard is a special organization that performs services for the Royal family. It has a considerable amount of fighting, organizational, and executive power compared to other organizations. They are responsible for protecting the Spirit King, the Royal Family and the Royal Palace. They are also charged with slaying Menos Grande, though the circumstances under which they do so are unknown.

Serving the royal family being the primary purpose of the Royal Guard, they don't interfere in Gotei 13's affairs and defense of Soul Society, as seen with major threats like Aizen and his Arrancar.

The Royal Guard commonly stay within the Palace of the King of Souls. When they travel the appear in a huge pillar called the Tenchuuren. This pillar enters from the inner dimension and lands with significant force upon its arrival.

The Royal Guard has has no soldiers, it only has 5 members and all of them are Captains. Their total power surpasses the power of all the 13 Divisions together.

Known Members

 * Kirio Hikifune - the former captain of the Twelfth Division before Kisuke Urahara, promoted 110 years ago.