Due to his actions and role, he is a supporting antagonist during the Wano Country Arc.
Guernica is a a tall, lanky agent. He appears to have double-jointed elbows, making him part of the Longarm Tribe. He wears a light colored mask with dark streaks running down its right side, darkened lips and nose, and framed with petal-like adornments. He also sports a vertically striped red and white top hat. Like most CP0 members, he wears a white suit and cape (a frilly one in his case).
Like most of CP0's agents, Guernica is professional and prioritizes his missions above all else.
In spite of his emotionless disposition, Guernica appears to care for his fellow CP0 agents to an extent, having silently acknowledged and mourned the sacrifice of one of his peers.
Abilities and Powers
Guernica's overall abilities remain mostly unseen. However, the fact he wears a mask puts him among the top operatives of CP0, according to Nico Robin. He appeared to be completely unharmed after being shot in the head by Kurozumi Orochi.
Guernica and two other CP0 agents traveled to Dressrosa in order to dismiss the previously reported revocation of Donquixote Doflamingo from the Seven Warlords of the Sea as a printing mistake to the country's population. They also insisted that the citizens remain quiet about this until the new report was published.
Wano Country Arc
In the Flower Capital, Guernica, Maha, and another agent negotiated with Shogun Kurozumi Orochi about the new supply of weapons to the World Government after the arrest of Donquixote Doflamingo. Due to Orochi's surreal demands, CP0 was unable to agree to his terms.
On the day of the Fire Festival, Guernica and the two other agents stayed in Onigashima's guest room and used a go board to track the forces during the raid on Onigashima, with Guernica in particular praising the planning and execution of the raid from the Ninja-Pirate-Mink-Samurai Alliance. Guernica also discussed Who's-Who's situation as a former Cipher Pol agent and how they should deal with him, although he did not think there was much harm in Who's-Who's survival due to his classified intel being relatively outdated.
After hearing about the events of the battle that took place and seeing how little by little the numbers of the rebels were assimilating those of their enemies, the agents received priority orders through Rob Lucci to capture Nico Robin, with Guernica staying behind to keep tabs on the raid as the other two went after her. After the two other agents lost sight of Robin, Guernica called and informed them about the great defeats produced on Kaidou's side, as well as the massive implications that a loss from the Four Emperors would mean to the current state of the world.
Later, after Izou confronted the two field CP0 agents, Guernica once more called the remaining agent and informed him about the new directives from the Five Elders to interfere in Luffy and Kaidou's fight in order to prevent a certain awakening from occurring, acknowledging that it was essentially a suicide mission that his partner had to take. Once the remaining CP0 agent completed his objective to sabotage Luffy, which led to his apparent death by Kaidou, Guernica silently mourned him.
Using Geppo, Guernica eventually escaped from Onigashima and regrouped with the World Government fleet that was stationed right outside Wano. He contacted the Five Elders and informed them about the return of Nika, assuring his superiors that he would capture Nico Robin as previously ordered to. After that, someone hijacked his call and ordered Guernica and the fleet to remain in position until the mystery caller arrived.
Guernica's contact with the Five Elders was eventually cut off due to a confrontation with the Big Mom Pirates. Guernica, however, was able to send a picture of Luffy in his awakened state to the government before that, which Morgans used for a new bounty poster.
- Guernica's name might be a reference to the Pablo Picasso painting Guernica.