Gyro

"Crab-Hand" Gyro is the captain of a pirate crew from South Blue that was on its way to the New World before an unfortunate meeting with the New Fishman Pirates.

Appearance
Gyro is a skinny man of average height with a child-like, oval face, and very square nose. He has two distinctive spots on his cheeks, dark hair, beard and mustache, he's missing a tooth and has what appears to be a massive four leaf clover on top of his head. He has well-developed pectorals and abdominals.

He sports a bicorne adorned with his Jolly Roger, tied around his neck with a string, much like Luffy with his straw hat. He wears a partially unbuttoned vest underneath a captain's coat worn with the arms in the sleeves, with the left sleeve being cut right below his elbow, and has a large buckled belt hanging on his chest from his right shoulder. He wears striped pants reaching down to his calves, with many stripes at the ends, similar to Eustass Kid, and sandals. He carries around a katana with him.

His most distinctive feature, as well as the source of his epithet, is the giant crab claw where his left hand should be. It is made of metal with spikes coming out of the arm. This is a weapon attachment, as his human arm is seen bitten off and floating next to him after being defeated by Hordy Jones.

Personality
He is a very logical man, as he knew he had to join the New Fishmen Pirates, as he could not fight them underwater, and that it was better to flee when he and his crew had the chance, rather than stay for Mermaid Cafe (as they all originally hoped) or fight against the fishmen.

Abilities and Powers
As the captain, he has command over his crew. Gyro stated that Hordy Jones isn't the first fishman he fought against, and that he overcame many dangers in the first half of the Grand Line, something proven by his presence on Fishman Island, which indicates some level of competence.

Weapons
He's armed with a katana and is presumably skilled in its use. His crab claw is assumed to be a weapon as well, as he was seen readying it to fend off Jones when the fishman attacked his ship.

History
At some point, he and his crew left South Blue and traveled halfway through the Grand Line and eventually made it to Fishman Island. After escaping the Kraken, who was asleep at the time, he and his crew were forced to join the New Fishman Pirates under the same threat that Hammond gave to the Straw Hats: being servants or sinking before entering the island. He and his crew eventually found an opportunity to escape and took it. Gyro told his men to forget about the Mermaid Cafe and that they are never returning to Fishman Island.

Before they can get very far, they were confronted by Hordy Jones. With his jaws, the fishman gave the pirates a complete and utter defeat. Jones allowed them to live and send them up to the surface in a bubble, telling them that when they resurface in the New World, they will tell the people on the surface about the fishmen.