203cm, 43 years old, Male / Commander of the 1st Division and Doctor of the Whitebeard Pirates. He shares a bond of trust with Captain 'Whitebeard' Edward Newgate deeper than anyone else's, serving as his right-hand man. Possessing a caring nature, he is well-respected and followed by his crewmates. He has a unique hairstyle where only the top is left long while the sides are shaved, wears a purple jacket, a belt with a gold ornament around his waist, and has a tattoo on his chest. He has a bit of stubble and his eyes are usually half-closed. He uses a peculiar speech habit, ending his sentences with "-yoi." While all 16 commanders of the Whitebeard Pirates are technically equal in rank, Marco, as the 1st Division Commander, holds the recognized position of second-in-command and Whitebeard's right hand.