TV Special
Description
Byrnndi World captains the World Pirates and serves as the main antagonist in the anime special "One Piece 3D2Y: Overcoming Ace's Death! Luffy's Pledge to His Friends." Over three decades before these events, he terrorized the seas as the "Destroyer of the World," launching indiscriminate assaults against World Nobles, Marines, civilians, and rival pirates. His destructive reputation prompted the World Government to declare him a major threat, issuing a 500,000,000 berry bounty and mobilizing the Marines, Cipher Pol, and the Seven Warlords of the Sea to capture him. During a critical battle, lower-ranking crew members betrayed him under government persuasion, enabling Cipher Pol agents to subdue him. His loyal subordinates—including his older brother Byojack—fled to survive, an act World perceived as betrayal. This resulted in his imprisonment within Impel Down's Level 6, where he was frozen to prevent aging and escape. He remained incarcerated until the mass breakout during the Summit War of Marineford orchestrated by Marshall D. Teach and Monkey D. Luffy.

World possesses a tall, broad-shouldered physique with large arms, thin legs, and a green beard featuring a distinctive W-shaped mustache. He wears a horned helmet with one broken horn—modified intentionally to accommodate his sickly brother sitting on his shoulder—a sleeveless black-and-purple coat, green pants, a brown belt, and brown shoes. Notable features include scarring on his scalp and missing teeth.

World's personality underwent a drastic transformation due to his experiences. In his youth, he cherished freedom and adventure, valued loyalty and friendship, and aspired to sail the seas with his brother. Following his betrayal and imprisonment, he became consumed by vengeance against the World Government, growing ruthless, distrustful, and emotionally detached. He reduced his crew—including Byojack—to expendable pawns, demanding strict punctuality and punishing failures harshly. His bitterness was compounded by ignorance of developments during his imprisonment, such as the functions of Cipher Pol or the Seven Warlords' roles. His signature laugh is "Barorororo."

World wields power from the Moa Moa no Mi (More-More Fruit), a Paramecia-type Devil Fruit enabling him to amplify the size or speed of any object he touches by up to 100 times its original parameters. He commonly uses this power on projectiles like bullets or thrown objects, magnifying their destructive capacity, such as enlarging cannonballs to obliterate islands or accelerating his own physical speed for combat. He employs advanced Armament Haki to harden his body or weapons, allowing him to injure rubber-based opponents like Luffy and block sharp attacks. He also utilizes Rokushiki techniques such as Soru (high-speed movement) and Geppo (pseudo-flight), often combining them with his Devil Fruit. His combat prowess includes superhuman strength, durability, and precision, traits maintained due to his frozen state halting physical aging.

In the "3D2Y" special, World escapes Impel Down, reunites with his crew, and attacks a World Noble transport ship to exact revenge, drawing Marine attention. To invade Marineford and Mary Geoise, he targets Boa Hancock—the nearest Warlord—kidnapping her sisters, Marigold and Sandersonia, from Amazon Lily to lure her. Luffy intervenes but is overpowered initially. World's strategy centers on using a massive island-destroying cannon amplified by his Devil Fruit. During the climax, he battles Luffy again, mocking his failure to save Portgas D. Ace. Though initially dominant, World is defeated by Luffy's Red Hawk attack after the latter masters full-body Armament Haki. In a final act of defiance, World attempts to fire his cannon at the Marines, but the projectile is bisected by Dracule Mihawk. Physically spent and surrounded, World succumbs to his injuries. Byojack remains beside him as their ship is destroyed, ending World's quest for vengeance.

World's character arc traces a descent from freedom-seeking adventurer to vengeful figure, culminating in a futile demise, exploring themes of betrayal, the corrosive nature of revenge, and the loss of camaraderie.