Marco The Phoenix

As commander of the 1st division of the Whitebeard Pirates, Marco has authority over the lower-ranking subordinates. Following Whitebeard's death, Marco became the highest authority of the Whitebeard Pirates, and as such the crew was under his command as they retreated from Marineford. He was one of the few men unaffected by the powerful Haki released by the Yonkou Shanks. He is a very experienced veteran, as he was shown as a member of the Whitebeard Pirates from the times of Gol D. Roger.

Marco is one of the strongest characters in the entire One Piece series, as he demonstrated in the war that he was on a similar level of fighting as the three Admirals and even Whitebeard himself. He was fully capable of fighting Admirals Kizaru, Aokiji and Akainu equally. Marco is also most likely the strongest member of the Whitebeard Pirates after Whitebeard, given his position as the highest ranked commander as well as now being the new authority of the crew.

Another indication of Marco's strength is that the Gorousei considered him as one of the few pirates capable of taking down Marshall D. Teach. His name was stated seperately from the rest of the Whitebeard Pirates, thus being acknowledged as a particularly powerful individual even amongst them.

On top of his Devil Fruit powers and Haki, Marco also possesses impressive physical strength and incredible reflexes. He kicked both Admirals Kizaru and Aokiji away great distances. He also appears to possess great stamina and endurance, as he had been pierced by several of Kizaru's laser beams and was still able to stand afterwards, despite being unable to regenerate due to the fact that his Devil Fruit abilities had been disabled by Seastone handcuffs at the time (a noteworthy achievement, as a single laser beam had previously been shown to have been powerful enough to defeat one of the Eleven Supernovas, Basil Hawkins). He is also incredibly fast, as he protected Whitebeard from Kizaru's Yasakani no Magatama in mere seconds.

Marco's fighting style seems to be primarily based on strong leg attacks. He usually switches back to his human form to deliver his kicks, but can also enhance them with the cutting power granted by his hybrid form's talons, as seen when he attacked Akainu after the latter delivered the fatal blow to Ace.