Guernica is a mysterious character in the anime and manga series One Piece. He is a high-ranking member of CP0, the secretive Cipher Pol Aigis Zero, which serves as the World Government's most elite intelligence agency. Guernica is known for his distinctive mask and enigmatic presence, often appearing during critical events. He plays a significant role during the Wano Country arc, particularly in enforcing the World Government's will and attempting to eliminate threats to their authority. His actions are pivotal in escalating the conflict.