Shirahoshi, the Mermaid Princess, holds immense power as the Ancient Weapon Poseidon in One Piece. Fans can expect Shirahoshi to play a crucial role in the Final Saga, potentially saving the world ...

One of the most important plot points in One Piece, the Ancient Weapons are going ... and as fans know Poseidon has already been revealed in the form of Shirahoshi. That leaves behind Pluton ...