Known to be the four most powerful pirates in the world of One Piece, the Yonko are said to be the rulers of the New World. Out of all the people seeking out the One Piece, they're known to be the ones closest to it. The Yonko have immeasurable strength, but that's not all. They also have a tremendous influence on the seas that they rule. They're known to hold vast territories under their absolute control, and have countless allies.