Sureido, also known as "Compressed Gunner Sureido", is a former CP10 agent turned Pirate from the Grand Line on an unknown island. He, with the rest of the Heikō Pirates, are the Main Protagonists of Trials of the World. He was a former Rear Admiral who was transferred over to CP10 by Chief Nōsu D. Oliver upon request 15 years before the current storyline. He betrayed CP10 after gathering enough Intel about the World Government.