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Boa Sandersonia is the character in One Piece. Boa Sandersonia is one of the three Gorgon sisters that rule over Amazon Lily. 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 older sister of Boa Marigold. Her bounty is 40,000,000 berries. Like her sisters, Sonia was once a slave of the Celestial Dragons. Originally, she started out as Monkey D. Luffy's enemy, but later become his ally and friend when he covered her slave brand and revealed he assaulted a Celestial Dragon.

She is voiced by Chiwa Saitō and Tomoko Kaneda (young) in Japanese and Lindsay Seidel in English.


Sandersonia is a large woman who resembles a snake. Her head is disproportionally large and wide to her body and her long tongue is forked, often sticking out of her mouth and has sea green eyes (amber in snake form).

Like the rest of the Kuja, she dresses in very revealing clothing. She is usually seen accompanied with the large panther, Bacura, at her side instead of a snake like the other Kuja. Along with her sisters, her beauty is highly admired by the Amazon Lily islanders. In her younger days, Sandersonia was average height teen who wore orange skirt and green top.

On her back, covered by her cape and her long green hair, is a mark of slavery branded on her by their previous Tenryuubito 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.

Sandersonia as a child at the age of 11 years old

Sandersonia after her clothes were burned during the fight in the arena.


Sandersonia appears very fond toward her older sister Hancock as noted by the fact she laughed at her sister's "twisted" personality.

While she appears to be living on the lie that her sisters and herself defeated a Gorgon to gain their curse, at the same time, she has not actually told a lie herself, unlike Hancock who is constantly lying. Sandersonia is the most emotional of the three sisters and highly emotional about their horrible past, her crying had to be eased by her younger sister Marigold and drove her to collapse onto the floor.

Due to her slave's shameful meaning, Sandersonia and her sisters made their fellow Kuja believe that on their backs were a set of eyes she and her sisters received as part of a curse for slaying the Gorgon. They told them that these eyes turned anyone who sees them into stone. If any of the Kuja found out the truth, Sandersonia and her sisters would be forced to leave the island and has no place to go or to live.

In battle, Sandersonia is a playful warrior who teases and torments her victims before she crushes them.



Sandersonia is close with her sisters Boa Hancock and Boa Marigold. Having experienced the same cruel treatment by the hands of the Tenryuubito, they protect the shameful secret on their backs from anyone including the various islanders of Amazon Lily.

Abilities and Powers

Ruling beside her sisters, Sandersonia has power over Amazon Lily and the rest of the Kuja women. Being a part of her sister's pirate crew, she is one of the elite Kuja warriors. She can also control her hair and shape them into snakes for increased attack strength.

Devil Fruit

While she was a slave, Sandersonia and her sisters were fed Devil Fruits as part of some sick form of entertainment for her former Tenryuubito masters. She in particular was fed the Hebi Hebi no Mi, Model: Anaconda. A Zoan-class Devil Fruit that allows her to transform into either an anaconda or a large naga-like creature and fight alongside her sister, Marigold, who was also fed a similar Devil Fruit.

While her powers to transform are Zoan Devil Fruit based, the Kuja of the island have been made to believe that Sandersonia's and Marigold's ability to turn into snakes is part of the curse the sisters made up.

Sandersonia turns into an anaconda hybrid

Sandersonia using Hebigami- Tsuki : Yamata no Orochi


Sandersonia possesses an ability known as Kenbunshoku Haki. Using it, she is able to read an opponent's movements and avoid their attacks. However, it is useless if said opponent is drastically faster than she is such as Luffy in Gear Second.

She can also use Busōshoku Haki since she was able to physically harm Luffy despite him being rubber.


Shameful Past

Many years before the current storyline, when Sandersonia was 11 years old, she and her sisters were captured by some slave traders while out on sea.

They were sold off to some Tenryuubito and had their backs branded with the mark of slavery.

As slaves of the Tenryuubito, they were horribly abused by their masters, as part of a cruel form of entertainment, Sandersonia and her sisters were fed Devil Fruits to amuse their masters. Living in this pitiful state, Sandersonia and her sisters could only think of dying.

It was only until four years later, when Sandersonia was 15 years old that they were freed from this cruel life, a fishman by the name of Fisher Tiger attacked Mariejois and freed the fishmen slaves there. While Fisher Tiger hated humans, he did not discriminate within slaves and also freed the human slaves which included Sandersonia and her sisters.

Not knowing how to return to Amazon Lily, Sandersonia and her sisters were fortunately able to return home thanks to Silvers Rayleigh, Shakuyaku, and a far from home Elder Nyon. The latter of the three cared for the three girls like a mother.

Thanks to having eaten the Devil Fruits while enslaved, Sandersonia and her sisters were able to come up with a story of them receiving a curse for slaying a monster called a Gorgon. This was all in order to cover the shameful marks on their backs from their fellow Kuja. Spreading this deception, they became Amazon Lily's rulers with her sister, Hancock, as the new empress.

Accompanying her older sister in a pirating campaign, Sandersonia and the rest Kuja pirates soon caught the attention of the World Government. Knowing how much power they had, the government signed a treaty with the Kuja and gave Sandersonia's sister, Hancock, the title of Shichibukai.

Summit War Saga

Amazon Lily Arc

On the way back to Amazon Lily after one of their pirating exploits, Sandersonia and the rest of the Kuja Pirates encountered the Marine Vice Admiral Momonga and his men anchored in the middle of the Calm Belt. Heeding his calls for Hancock to come before him, Sandersonia accompanied her sisters in greeting the Vice Admiral. Despite the Vice Admiral's demands that Sandersonia's sister comply with the compulsory Shichibukai meeting in which Hancock lied about attending, Sandersonia joined in her sister's continued refusal to help the World Government in such a critical juncture. After her sister turned all of Momonga's men to stone, Sandersonia and the rest of the pirates looted the ship and returned to Amazon Lily.

After having arrived back, Sandersonia and her sister Marigold set forth to guard their elder sister from any roaming eyes as Hancock took a bath. Unfortunately, as Sandersonia and Marigold were guarding her, Luffy accidentally crashed through the roof of the bath. Coming into the bath to see what happened, Sandersonia and Marigold found out that this man had seen what was on Hancock's back while she was bathing.

Realizing that this man had discovered their secret, the three sisters decided that Luffy had to die. However, Hancock's attempts to turn Luffy to stone, Luffy was unaffected. Knowing that no one could be immune to her sister's beauty regardless of age and gender, Sandersonia guessed that Luffy's fear of death might be overwhelming any wicked desires. Though Sandersonia and her sisters could not eliminate Luffy then and there, they still manage to capture him.

With Luffy captured and brought to the arena of Amazon Lily, Sandersonia accompanied her sisters to see him be executed along with the rest of their subjects. After her sister turned three Kuja warriors to stone for rescuing Luffy from some mushrooms, the panther that accompanied Sandersonia, Bacura, was sent to devour Luffy. However despite her pet's ferociousness, Luffy beat him with sheer brute strength.

After this, and Luffy's apparent continuing obliviousness to her eldest sister's charms, Sandersonia, accompanied by Marigold, decided to take matters into their own hands. Facing Luffy, Sandersonia and her sister turned into snake-human hybrids and prepared to attack him with a technique the other Kuja called Saragi Dance.

As Sandersonia and her sister battled against Luffy, they decided to torment him by breaking Marguerite, one of the Kuja warriors who saved him, into pieces before his eyes. However just as Sandersonia was about to break Marguerite, Luffy shouted loudly at them to stop. Feeling the force from Luffy's shout and seeing several Kuja warriors in the audience suddenly pass out, Sandersonia and her sisters realized that Luffy also possessed Haki, and his caliber was on par with Hancock's. Stunned by this revelation, Sandersonia and Marigold watched as Luffy decided to fight them more seriously.

Having seen that their opponent was no ordinary man, Sandersonia and Marigold decided to fight against Luffy more seriously as well. Unfortunately, upon Luffy activating Gear Second, he proved too much for Sandersonia and her sister. In the middle of the fray, Sandersonia accidentally got caught on fire by her one of her sister's techniques. With her tail also tied to her sister's by Luffy, Sandersonia almost fell into the spiked pit around the arena while on fire. Though the fire was put out and she was able to reach the stands to prevent herself from falling, the fire unfortunately burned off all of her clothing, including the cape that covered her back.

With the cape burned, her long hair unable to cover her back due to her position, and the smoke clearing, Sandersonia and her sisters' secret was about to be exposed. However, before anyone of the Kuja in the audience could see her back, Luffy covered Sandersonia. Wondering what he was doing, Luffy explained to Sandersonia that despite the fact that she and her sisters were trying to kill him, he had no intention of killing them nor did he have the intention of allowing their deepest secret to be revealed. With Sandersonia's back covered, her sister, Hancock, ordered everyone to leave the arena. With their secret safe, Hancock, decided to reward Luffy for concealing it. However, Hancock told that Luffy he could ask for one request, a ship or to turn Marguerite and the others back to normal. Much to the Gorgon Sisters' surprise, Luffy asked for the latter.

After the three Kuja warriors were reverted to normal, the Gorgon Sisters decided to discuss what Luffy saw on Hancock's back. Learning that Luffy mistook the symbol for the one on his fishman friend Hatchan, they soon also learned from Elder Nyon that this man was Monkey D. Luffy, a pirate whose act of defiance against a Tenryubito was reported in the news. Discovering this, Hancock decided to reveal her past to Luffy despite the horrible memories it held. Having explained everything to Luffy, the Gorgon sisters learned that Luffy completely hated the Tenryubito for their crimes. With this, Sandersonia's elder sister decided to lend Luffy their ship.

With Hancock deciding to help Luffy, the pirate was soon accepted within the community of the island. However, despite the festivities celebrated around Luffy, a more important matter soon arose that caught Sandersonia's attention. Her sister had started to behave strangely. Not knowing what was happening to her, Sandersonia and everyone else who tended to Hancock's side thought she had contracted a disease. When news of Hancock's condition reached Elder Nyon, the old woman apparently confirmed their suspicions and told them that it was something the previous empresses of Amazon Lily had died of. As all this was happening, Elder Nyon told Hancock that Luffy wanted to talk to her. Despite her condition, Hancock decided to talk to Luffy alone.

Hiding alongside Marigold so they could eavesdrop, Sandersonia learned what Luffy wanted. It turned out that Ace, the one was to be executed by the World Government, was actually Luffy's older brother. The pirate asked Hancock to answer the compulsory Shichibukai call so he could join her and sneak into Impel Down where Ace was being held before his execution. Hearing this request, Sandersonia and Marigold were deeply outraged by what Luffy was asking. Knowing how painful it was emotionally to return to the cursed "Holy Land", the two of them were expecting their sister to turn Luffy into stone for asking such a thing. However much to their surprise, their sister accepted Luffy's request while blushing. It was then that Elder Nyon revealed to them that the disease that their sister had contracted was actually "love sickness".

With her sister's decision, Sandersonia and the rest of the Kuja Pirates saw Boa Hancock and her snake off to Momonga's ship along with Luffy hiding in her coat. With their sister going to Mariejois, Sandersonia and Marigold promised Hancock that they would take care of Amazon Lily in her stead.

Post-War Arc

After the war between the Whitebeard Pirates and the Marines, Sandersonia's sister came back to Amazon Lily along with several men, most notably a heavily injured Luffy. As not to set a bad example, Hancock was forbidden to see Luffy until he was fully recovered. The situation however did cause both Sandersonia and Marigold some concern over their elder sister as Hancock refused to eat anything since she arrived back.

After some time, Sandersonia went with her sister and Nyon to give Luffy some food. Upon reaching the rendezvous point, they meet and got reacquainted with Rayleigh who had just arrived on the island to offer Luffy something.

Two Years Later

Sandersonia is seen with Hancock, Nyon, Marguerite, and Marigold to pick up Luffy from Rusukaina. She remarks that Luffy has become the "Boss" of the entire island. After Luffy picks up his hat, the Kujas took him back to Sabaody Archipelago.

As Luffy and his crew prepare to sail for Fishman Island, Sandersonia and the Kuja Pirates aid them by holding back the marines.

Translations and Dub Issues

Before it became officially clear on the Amazon's naming scheme, "Sandersonia" was also often translated as "Thunder Sonia" by early translators.

Major Battles

  • Sandersonia and Marigold vs. Luffy



  • Her name comes from the flower sandersonia. The Sandersonia was a flower that commercially began to be sold in 1998, the head of each flower is large and bulb-like, much like how Sandersonia's head is large and bulb-like.
  • While Sandersonia and her sisters' title, the Gorgon Sisters, comes from supposedly slaying a monster with the same name, their concept is loosely based on the three actual mythological Gorgon sisters which includes the famous Medusa. Sandersonia is also able to convert her hair into snakes; snake-hair was another gorgon trait.
    • As the middle sister, she can be considered the equivalent to Euryale, who is noted for her bellowing cries; particularly in the tale of Medusa's death at Perseus' hands. Sandersonia is the most emotional among the sisters and cried out upon reminiscing about their horrific past.

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