Affiliations: Kuja; Kuja Pirates
Occupations: Pirate; Ruler of Amazon Lily; 30
Height: 453 cm (14'10")

Boa Sandersonia is one of the three Gorgon Sisters that rule over Amazon Lily, and one of the second-in commands of the Kuja Pirates. She and her sisters are called the Gorgon Sisters for supposedly heroically slaying a monster called the Gorgon. She is the younger sister of Boa Hancock and the elder sister of Boa Marigold.

Prior to being a ruler of Amazon Lily she was a slave of the Celestial Dragons. On her back, covered by her cape and her long green hair, is a mark of slavery branded on her by their previous Celestial Dragon masters. It resembles a hoof mark and is a sign that means that she is "less than human" since she was a slave. Her sisters share this mark as well on their backs.