An agent to President Valentine, Axl RO attacks Hot Pants, Gyro and Johnny with his Stand in Gettysburg, Pennsylvania, summoning corporeal representations of figures from their pasts in order to steal the Saint's Corpse parts. He is a Stand user, powering his Civil War with guilt.

Axl appears to be a middle-aged man of average to above-average height and medium build. Darkness (either shadow, paint or a tattoo) covers his face to just below his eyes and in mirrored, hook-like tribal marks on his cheeks; save for a scattering of dots.

Over a light, drooping rag, he wears a thick, round military helmet covered by a net. He wears a thick wide-necked top, bearing four dark rectangular patches between his shoulders and elbows on his long sleeves. His chest is overlaid with a V-shaped piece from which hang layers of squares; and he wears dark, knee-high boots.

Axl's most characteristic trait is his desire to purify himself from his sins in order to rid himself of the ghosts of his past comrades haunting him.