ONE PIECE RPG

The world of One Piece is populated by humans and other races such as dwarves (more akin to faeries in size), giants, merfolk, fish-men, long-limbed tribes, long-necked people known as the Snakeneck Tribe, and animal people (known as "Minks"). The world is governed by an intercontinental organization known as the World Government, consisting of dozens of member countries. The Navy is the sea military branch of the World Government that protects the known seas from pirates and other criminals. There is also Cipher Pol which is a group of agencies within the World Government that are their secret police. While pirates are major opponents against the Government, the ones who really challenge their rule are the Revolutionary Army who seeks to overthrow them. The central tension of the series pits the World Government and their forces against pirates. The series regularly emphasizes moral ambiguity over the label "pirate", which includes cruel villains, but also any individuals that do not submit to the World Government's authoritarian—and often morally ambiguous—rule. The One Piece world also has supernormal characteristics like Devil Fruits, which are mysterious fruits that grant whoever eats them transformative powers. Another supernatural power is Haki, which grants its users enhanced willpower, observation, and fighting abilities, and it is one of the only effective methods of inflicting bodily harm on certain Devil Fruit users.

The world itself consists of two vast oceans divided by a massive mountain range called the Red Line. Within the oceans is a second global phenomenon known as the Grand Line, which is a sea that runs perpendicular to the Red Line and is bounded by the Calm Belt, strips of calm ocean infested with huge ship-eating monsters known as Sea Kings. These geographical barriers divide the world into four seas: North Blue, East Blue, West Blue, and South Blue. Passage between the four seas, and the Grand Line, is therefore difficult. Unique and mystical features enable transport between the seas, such as the use of Sea Prism Stone employed by government ships to mask their presence as they traverse the Calm Belt, or the Reverse Mountain where water from the four seas flows uphill before merging into a rapidly flowing and dangerous canal that enters the Grand Line. The Grand Line itself is split into two separate halves with the Red Line between being Paradise and the New World.