Portgas D. Ace is a tall and muscular young man with a lean build and a distinctively heroic and confident demeanor. He has short black hair, and his most striking feature is a striking tattoo on his back that reads "ASCE" with the "S" crossed out, representing the initial of his given name and deceased mother, Portgas D. Rouge. He often wears a red or black open-front shirt with a black sash tied around his waist, exposing his well-defined chest and abdominal muscles.