All of the crew members are women chosen from the Kuja tribe of their homeland. Though only the elite warriors of the tribe were selected to be members of the Kuja Pirates crew, every member of the Kuja tribe has been classified as a pirate by the World Government whether they are an islander or an actual pirate.
The Kuja's Jolly Roger has a small skull with no jawbone, and no crossbones. Instead it has nine snakes appearing from behind the skull, curving to the right. The crew members are chosen from the strongest women in the tribe, and are led by the famous "Gorgon Sisters" of the Kuja tribe: Empress of the tribe and former Warlord of the Sea, Boa Hancock, and her younger sisters Boa Sandersonia and Boa Marigold.
After the Seven Warlord of the Sea was disbanded, Hancock's bounty was increased to 1,,, All the Kuja tribe members are capable of using Haki , making them formidable opponents, even against Devil Fruit users. They usually combine their Haki with their Snake Weapons to launch powerful strikes.
Considering the members of the crew are elites, their mastery must be higher than the islanders. Hancock, in particular, possesses the Haoushoku Haki. In addition, while in the Battle Arena for Luffy's execution, most of the members of the crew were able to resist the effects of his Haoushoku Haki while most of the islanders were knocked out, a further testament to their strength. These powers make them even more formidable than the rest of the tribe and crew.
The younger sisters are strong enough to hold the advantage against Monkey D. Luffy , a Super Rookie with a ,, bounty, thus he quickly overpowered them once he started using Gear 2. To deceive the rest of the Kuja members from their shameful past of slavery , the Gorgon Sisters created a lie, saying their powers are a curse for killing a Gorgon monster.
