The world of One Piece has several characters who have, over the years, established themselves as mighty forces on the seas. Among the powerhouses of the One Piece world, there are most definitely characters whose strength knows no bounds, such as the Yonko, and of course, the Admirals are right around the corner as well. Then, there are newly introduced characters such as the Holy Knights, and of course, one absolutely cannot forget about the Five Elders and the one who rules them all, Imu. These are all monsters who have, over the years, become legends.