Asparta Mayoi, also known as "Ten Seconds, Mayoi", is the greatest Doctor of the Imperial Pirates that hailed from West Blue, on an island known as Xei. He, with the rest of the Imperial Pirates, serve as major Antagonists within Trials of the World, wreaking havoc across the globe with their crew, and constantly fighting with those that oppose them, such as the World Government. His parents were former members of a crew that was led by Sui before they died at the hands of an unknown enemy. Due to Mayoi and Kyoto's parents never telling Kyoto that he had an older brother, Kyoto is unaware that Mayoi is related to him for the majority of Trials of the World.