Marco began his journey as an apprentice aboard the Whitebeard Pirates, where he quickly became one of Whitebeard’s most loyal and capable crewmates. Over the years, Marco earned the position of 1st division commander, serving as Whitebeard’s right-hand man and closest ally. During the Summit War of Marineford, Marco played a significant role in defending his captain and the crew, displaying both his incredible strength and unshakable loyalty.

Following Whitebeard’s death, Marco led the remnants of the crew, stepping into a leadership role to uphold Whitebeard’s legacy. However, the crew faced significant challenges, culminating in their defeat during the Payback War against Blackbeard, which led to their disbandment. Marco returned to Sphinx Island, Whitebeard’s home, to serve as a doctor for the local community.

Marco is a tall, lean man with a distinctive tuft of blond hair styled upward. His relaxed demeanor is reflected in his simple attire, typically consisting of an open shirt and shorts, even during battles. When using his Devil Fruit powers, Marco transforms into a magnificent blue phoenix with flames, a form that adds a mythical quality to his appearance.

Marco is calm, level-headed, and fiercely loyal to his captain and crew. As one of Whitebeard’s closest confidants, he embodies the spirit of camaraderie and leadership. Marco’s reserved and thoughtful nature contrasts with the fiery intensity of his battles, where his strength and resilience shine. Despite the hardships he has faced, Marco remains humble and compassionate, dedicating his later life to helping others as a doctor.

Marineford Arc
Marco played a pivotal role during the Summit War of Marineford, fighting to protect Whitebeard and rescue Portgas D. Ace. As one of the most powerful members of the Whitebeard Pirates, Marco showcased his formidable abilities and unwavering loyalty, standing as a key figure against the Marines and Warlords.

Post-Marineford and Payback War
After Whitebeard’s death, Marco assumed leadership of the crew, attempting to maintain their unity and legacy. However, their defeat in the Payback War against Blackbeard resulted in the crew’s disbandment, marking a significant turning point in Marco’s journey.

Wano Country Arc
Marco returned as a major ally during the Raid on Onigashima, supporting the Ninja-Pirate-Mink-Samurai Alliance in their battle against Kaidou and Big Mom. His experience and strength proved invaluable in the war, showcasing his enduring commitment to fighting for justice and honor.

Retirement to Sphinx Island
Following the events in Wano, Marco permanently retired from piracy, choosing to live a peaceful life as a doctor in Whitebeard’s home village on Sphinx Island. His dedication to helping others reflects his compassionate and selfless nature.

• Edward Newgate (Whitebeard)
  Marco’s captain and mentor, Whitebeard held a fatherly role in Marco’s life. Their bond was one of mutual respect and loyalty.

• Blackbeard (Marshall D. Teach)
  A former crewmate turned adversary, Blackbeard’s betrayal and the Payback War deeply impacted Marco and the Whitebeard Pirates.

• Straw Hat Pirates
  Marco formed an alliance with Luffy and his crew during the Wano Country Arc, aiding in their battle against Kaidou and Big Mom.

• Straw Hat Pirates
  Kuma’s actions saved the crew from destruction and allowed them to grow stronger, cementing his role as a secret ally despite his initial portrayal as an antagonist.