Imu-sama

Imu is the supreme ruler of the World Government, who occupies the Empty Throne and whom even the Five Elders bow to and serve. However, Imu's existence is kept an absolute secret within the government and from the world at large, to maintain the lie that there is no singular ruler of the world.

Imu has only been shown as a silhouette so far. They possess a humanoid figure similar in size to a regular person, with a hand resembling a human's and sharp, almond eyes with red irises, each having a thin ring around the pupil. In terms of attire, Imu dons a crown that has four sharp, incredibly tall spikes on the top and an extremely long robe that flows upon the ground a great distance behind them. Imu's voice has a distorted echo to it.

Little is known about Imu's personality. When not speaking with the Five Elders, Imu usually spends their time in the Room of Flowers in complete silence, gently handling butterflies and listening in on conversations that may be of their interest.

Imu has developed a particular interest in Monkey D. Luffy, Marshall D. Teach, Shirahoshi, and Nefertari Vivi, keeping wanted posters or photos of all four on their person. Imu was also shown to have left the aforementioned pictures (save for Vivi's) pierced through and cut apart by blades. Imu appears to have a high degree of familiarity with Nefertari D. Lili, one of the First Twenty, and this interest appears to extend to her descendant, Vivi.

The Empty Throne is an extremely tall, ornamented red and gold throne that bears the symbol of the World Government. The golden armrests are designed to look like lion head statues. It is a size suitable for a large sized human, one who is around two or three times the size of a normal human. The throne itself is kept on top of a three-level red and white platform, which is positioned extremely high up from the main floor, almost making it look and feel like whoever sits on it rules supreme over everyone. On the third floor, there are nineteen rusted weapons planted on the ground (both swords and axes), which are from the rulers of the twenty founding kingdoms, except for the Arabasta Kingdom while on the first floor are weapons of kingdoms that later joined the World Government. The platforms have moss growing on them, suggesting they are soil-based.

Mary Geoise: The Holy Land Mary Geoise (聖地マリージョア, Seichi Marījoa?) is the capital of the World Government where its top brass reside and govern, the God's Knights have jurisdiction, and where the Celestial Dragons reside. It also hosts the Levely, a council of royalty from various World Government-affiliated nations that is in session every four years.

Pangaea Castle (パンゲア城, Pangea-jō?) is a gigantic castle that dwarfs all the other buildings in Mary Geoise. Pangaea Castle is where officials of the World Government meet and work; it is also where the Levely takes place. This castle seems to have at least six floors, plus extra structures on top, including a number of towers. Within Pangaea Castle, there is a monument known as the Empty Throne, a grand chair that is said to be located at the center of the world. Its "emptiness" is meant to symbolize that the world has no one singular supreme ruler. Additionally, each of the 20 royal families that founded the World Government lodged a weapon in the floor around the throne, as a sign of their protection over it. To this day, those weapons still remain stuck in the floor.