Sandman comes from a community in the Arizona Desert. Despite being ostracized, he hopes that winning the Steel Ball Run race will earn him the money to buy back his ancestor's land and becomes one of the fiercest competitors in the race thanks to his running technique. He eventually sides with Funny Valentine and battles Johnny Joestar and Gyro Zeppeli near the Mississippi River to take their Saint's Corpse parts. Sandman is a Stand user who wields In a Silent Way in battle.

Sandman is a man of average to above-average height and athletic build. He wears his mostly light hair in two long braids crossing his face. He is sparsely clothed, with a few tattoos around his body. On both side of his biceps is a tattoo of a slithering snake inside a circle, lined with triangles pointing inward, while on his right chest are three lines that resemble check marks.

Sandman is introduced as an open-minded member of his community, for instance shown in the possession of books expressively forbidden by them due to originating from white settlers and having developed his unique and admittedly extraordinary running style while ignoring his people's own techniques. Sandman is critical of his community, highlighting to his sister their outdated views and their misconceptions. For instance he claims that the idea of a claim to an ancestral land is out-of-date when the majority of the population now thinks on a financial level. Nonetheless, he is ready to take the risk to participate in a continent-spanning horse race to give back stolen lands to them, showing a great degree of loyalty.