Marks is a tall, muscular man with broad shoulders, large arms, and slim legs. He has medium-length, dark-colored hair, a mustache, a beard, a widow's peak, and prominent lips. He also has a tattoo on his neck.
In his concept art, his tattoo stretched down his left arm.
After the Roger Pirates disbanded, it is unknown what became of Marks.
- One Piece Manga and Anime — Vol. 96 Chapter 966 (p. 16) and Episode 967, MAX Marks makes his debut.
- SBS One Piece Manga — Vol. 96, MAX Marks is named by Oda.
- One Piece Manga — Vol. 96 Chapter 967 (p. 16), Marks and some of the other Roger Pirates meet about the journey to the final island on the Grand Line.
- One Piece Manga — Vol. 96 Chapter 968, The Roger Pirates disband.