Royal Earthbender Guards

The Royal Earthbender Guards of Ba Sing Se, commonly known as the King's Guards, were earthbending warriors within the Earth Kingdom affiliated with neither the Dai Li nor the military. They instead served as personal protectors of the Earth King.

Tasked with guarding the Royal Palace, they were seen as the gatekeepers of the Outer and Inner Walls of Ba Sing Se. They also served numerous roles in important events, such as the Fire Nation's attempt to demolish Ba Sing Se's walls with a drill and Bosco's party.

They sported a uniform different from that of a normal Earth Kingdom soldier, wearing heavier, dark green armor with a green feather on top of the helmet.

History
In the spring of 100 ASC, the Royal Earthbender Guards attempted to prevent Avatar Aang and his team from reaching the Earth King.

Later, a group followed Earth King Kuei while he toured around the city with Aang, Katara, Sokka, Toph, Appa, and Momo. The guards used specialized surface-to-surface rocks against invaders approaching on foot, but the projectiles were displayed to be able to also serve as surface-to-air rocks against airborne intruders.