The Royal Guards (literally meaning "Guards") are people who serve a royal family, each country has a unique sets of guards based on the climate or personality of a nation.
Drum Kingdom: These guards are dressed in a warm suit. They have green coats, snow goggles, ear-flap snow caps, brown gloves and black boots. Their leader was Dalton, until King Wapol was overthrown, by which point the entire organization has since collapsed.
Alabasta: These guards are dressed with a tunic capes, brown metal dragon-pattern armor, sandals, and a metal helmet. They are often seen having a long rods with a blade at the end. Igaram is the captain of the guards, with Pell and Chaka being the commanders under Igaram. While Igaram was gone, Chaka was the acting captain. They first appeared in Chapter 130 and Episode 78. The Tsumegeri Guards were the elite amongst these guards.
Mariejois: These guards are dressed in medieval armor, with pointed helmets and the armor covering their chest and arms. They wear aqua green pants. Their weapons of choice are spears, and they usually accompany the World Nobles.
Lvneel: These guards are dressed in a mesh-mail that covers their arms, with a purple double-breasted bolted sleeveless shirt over it, with two brown belts at the waist, purple gloves, and blue pants. They have no sailing experience, which led to many of them dying on their way to Jaya on the Northheim.