He is one of the longest running and most noteworthy primary adversaries of the series, as he was the first enemy to hand Luffy a complete and utter defeat, as well as one of only two who has defeated Luffy more than once. He was originally introduced as one of the Seven Warlords of the Sea but was later stripped of his title after attempting to take control of the desert kingdom Alabasta.
Crocodile is a tall man with a wide chest, broad shoulders, muscular arms and legs, and a thick neck. He has pale skin and nape-length black hair which is kept neatly slicked back, though strands tend to fall in front of his face during battles. Crocodile has various battle wounds, most notably a long stitched scar at the bridge of his nose that stretches across his face and a large hook made from a tough gold alloy in place of his left hand. His eyes are deep-set and heavy-lidded, and his thin eyebrows are characteristically drawn upward in the middle. This gives his usual facial expression a feeling of condescension and distrust. Crocodile speaks with a deep, relaxed voice, and he is usually seen smoking a thick cigar produced by his company. In the anime, his skin is somewhat of a grayish color.
His theme of dress is meant to convey the image of an Italian mafia boss. In his original appearance, Crocodile wore a bright orange, black-striped button up vest over a long-sleeve peach shirt (white in the manga and One Piece: Pirate Warriors series), along with a blue scarf, dark brown suit pants, and polished black shoes with gold buckles. He also wore a long, thick, dark pelted fur coat (fully dark green in the manga and One Piece: Pirate Warriors, dark gray with a regular gray fur trim in the anime, and dark green with a light green trim in Movie 8) over his shoulders.
After he was incarcerated at Impel Down, he wore a striped prisoner uniform, like most other prisoners, but was somehow permitted to keep his gold hook. After joining Luffy and Jinbe on their mission to save Ace, he obtained a full change of clothes from the supplies of Newkama Land and thereafter wore a black shirt, a green scarf, dark grey slacks, and a black overcoat with brown tan (light color in the anime) fur trim. After the Battle of Marineford, he is seen in attire that greatly resembles the one from Alabasta, consisting of a vest over a plain shirt, a scarf around his neck, suit pants, elegant shoes, and a fur coat draped around his shoulders.
In all his appearances, he wears a single gold hoop earring in his right ear, and he usually has several golden rings with different colored gemstones on every finger except the ring finger, for reasons unknown. (In the anime version of the Alabasta arc, it was his middle finger that was bare. This has since been corrected in recent arcs.)
In SBS Volume 63, Oda drew the Seven Warlords as children. Crocodile is shown having a similar hairstyle as his adult self but is missing his trademark scar and hook. He is shown wearing simple clothing with a large pistol slung on his belt.