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Hero Overview

My name is Yamato! I'm Kaido's son!
~ Yamato's introducing to herself.
Damn it, that bull-gorilla!! He was seriously trying to kill me!!! I understand!! He is not a parent anymore!!!
~ Yamato disowning Kaido after Luffy removed her explosive cuffs.

Yamato, also known as Oni Princess, is a major character of One Piece who first appeared in the Wano Country Arc. She is the daughter of one of the Four Emperors of the Sea, Kaido who holds many epithets. Since the moment of his death 20 years ago, Yamato idolized the legendary samurai, Kozuki Oden when she was just 8 years old, and started declaring herself to be Oden. She was constantly abused by her father in her childhood and imprisoned on Onigashima some point later. Despite that, she has fought her father countless times only to be repelled, with each failure making her stronger.

She befriended Portgas D. Ace who arrived on Wano 4 years prior to the current story. She also gave him her vivre card. Four years later, she met his sworn brother, Monkey D. Luffy, and declared that she would join the Straw Hat Pirates after the war.

Yamato is voice by Saori Hayami in the Japanese version of the anime.


Yamato is a rather tall 28-year-old young woman, being twice Luffy's height. She has long white hair tied into a ponytail using orange rods. Her white hair eventually fades into an aqua-green and bluish colour the further it goes down. She has orange coloured eyes with well-defined eye lashes. One of her most distinctive feature is her red horns.

Clothing wise, Yamato chose to don a similar type of clothing reminiscent of Kozuki Oden. In the past, she also commonly wore a Hannya mask. She later tore off the sleeves and removed the mask after revealing her true gender as a female to Luffy. She is also seen wearing gold hooped earrings.


Since Yamato's childhood, she idolized Kozuki Oden, and wanted to become like him after seeing his execution where he saved his samurai at the cost of his life. However, because of this admiration that caused her to want to become "Kozuki Oden", she sounds almost child-like in her declarations, often creeping out the other retainers whenever she introduces herself as such.

Yamato has a particular hatred towards her father, Kaido, for his constant abusive treatment to her since childhood. This was further strengthened after realising that he indeed placed explosive handcuffs on her, which would have detonated if she were to leave Onigashima. She laments how any father could have done this to their child, no matter how sour their relationship was.

Following Kaido's betrayal of Orochi, she disagreed with his idea of making her the new Shogun of new Onigashima. Despite the hatred Yamato has for her father, she didn't in good faith believe that he'd try and kill her using explosives, but she later disowned Kaido as a father by calling him a "bull-gorilla" after witnessing that the handcuffs did, in fact, trigger a massive explosion after Luffy removed them, tearfully announcing that she does not care if he dies.

Due to being secluded in Wano's Onigashima her entire life, Yamato desires to see the outside world and venture out of Wano, is similar to Oden. This is further shown in her initial encounter with Ace who started explaining his travels around the world, causing her to react almost like a child would. Therefore, she waited patiently for the time that she would meet Ace's brother, Luffy so that she could join his crew, which she openly declared to Kaido that she'll be leaving out to the sea with them after defeating the Beast Pirates.

An additional affect of her forced isolation is that Yamato doesn't appear to be aware of the use of nicknames. This was first shown as she believed Luffy had forgotten her name after he nicknamed her "Yamao/Yama-bro" similar to Law, who he calls "Traffy", and Kid, who he calls, "Jaggy".

She is also incredibly knowledgeable as she was able to create Ace's vivre card with either just a strand of his hair or a piece of his fingernail. She also keeps herself up to date with the ongoings of the outside world through newspapers, ensuring that she doesn’t miss any big news.


Yamato is the daughter of the highest bounty pirate in the world, Kaido, and an unnamed woman, however, the current status of her mother is unknown. She is presumably a child of an Oni. Twenty years prior, she witnessed the death of Kozuki Oden in the Flower Capital during the legendary hour, which was the same time that she started to idolize him and the other Nine Red Scabbard.

Days after Oden's death, Yamato told Kaido that she wanted to be like Oden. He then physically punishes her for making such a statement, and decided to starve her so she would repent. She also showed her first signs of Haoshoku Haki at the age of 8 after being tied to a rock and having those around her suddenly become unconscious. Despite praising her for awakening such a rare ability, her father told her that she'll be better off dead if she continues saying she was Oden. He then locked her up in a cave with no hopes of escape for a month.

Additionally, he also added 3 Samurais into the cave, thinking that they’ll kill her as she was the child of the person who took everything away from them. To add further impetus, he only gave 1 portion of food and numerous swords so that they would fight over the food.

Astonishingly, the Samurais unanimously decides to give Yamato the food, sympathising with her for being born into such a family. Furthermore, they also taught her how to read Oden's Logbook after she told them that she couldn’t understand the big words.

Yamato becomes greatly appreciative and tearfully vows to go out to sea and become stronger in an attempt to take back Wano's freedom from her father. The Samurais decides to imparts their wishes and hope onto Yamato, making sure she survives to contribute for a better future.

Many unnamed people felt sympathy for the Young Yamato including some from her father's crew. They even offered her food and blankets to make her situation a little better but were executed soon after when they were found out. Yamato was seen crying and eavesdropping when they were being crucified, silently listening to others push blame onto her as the cause of their deaths.

She was told by the father that it was beneath her to form friendship with humans and was beaten harshly for it. Furthermore, her father incited that she was always alone, hopping about the rocks, crawling through the attics, as he told her that it was her fate that everyone who ever showed favour to her ends up dead.

Some time ago, Yamato ate an incredibly rare Mythical Zoan Devil Fruit unknowingly when she was hungry, unaware of the importance of such a fruit.

When Ace arrived in Wano more than 2 years ago, they fought for awhile with Yamato allowing Ace to free the captive prisoners as an act of open defiance against Kaido. Ace was confused as to how someone as strong as her wasn’t the captain, and was surprised when she said she was imprisoned. Ace began sharing with her the childhood of himself, Sabo and Luffy. Yamato began to cry as she saw the story of Roger and Oden inside them. She excitedly asks Ace what he thought if she, Ace and Luffy went out to sea together in the future. Ace was elated as he encourage them to meet again.

Yamato then made Ace's vivre card as he tells her not to lose it. Looking at her chain and then at Ace, she began hoping for a brighter future. A while later, Yamato was holding onto Ace's vivre card when it began burning up. She was still in bandages from her last confrontation with Kaido, but soon began wrecking havoc. She went back to the hills they bid farewell as the paper disintegrated fully. She broke down as she continuously bashed her cuffs till her hands bled, lamenting that she couldn’t save her one and only friend. That she couldn’t live freely live Oden.

Kaido was enjoying her suffering as he states that no matter what she holds on to, it won’t matter as he personally went down to punish her again. Yamato then recalls Ace's words that Luffy will set sail soon. With new found motivation, she declares that she wait forever for Luffy if necessary as she charges as Kaido, reiterating that she's Oden once again.


As the daughter of the Strongest Creature in the World, Kaido, Yamato is an extremely powerful warrior. She is strong enough to earn recognition from the Tobiroppo, six powerful and famous pirates who have all eaten Ancient Zoan Devil Fruits, all of whom noted that it'd be a difficult task to bring her in.

Superhuman Physical Prowess: Yamato has immense physical abilities which includes durability, speed, strength and many more that resembles her father as shown when she defeated Ulti with little effort, and moved fast enough to hit her without giving her the chance to avoid it. She later outran Ulti, Page One, and several other pursuers at high speed, while carrying Luffy. Yamato was capable of matching and surpassing the strength and speed of Luffy who was using a Haki-enhanced Gear Second and Gear Third without showing any difficulties in fighting him. Most notably, she was still in seastone Handcuffs at this moment, which is known for severely weakening devil fruit eaters like herself. She is able to endure cannonball shots at point blank and fight without fatigue afterwards. Without her restraints, she is seen competing fairly evenly with her father at his strongest hybrid form.

Her body is also incredibly resistant to fire as she was able to continue fighting without much difficulty despite being burnt by Ace's, Kaido's, and Kazenbo's fires. Each of the above character's fire abilities had incapacitated many foes with Kaido being able to obliterate a huge mountain while Kazenbo killed many people just by being on the same floor as them.


Yamato is one of the few characters capable of using all three types of Haki and at least two advance applications of it.

Haoshoku Haki

Yamato possesses the innate ability to use Haoshoku Haki, which is a rare power said to exist within one in several million people and also described as being chosen by Heaven, holding the qualities of a "King". She used this for the first time against the Beast Pirates when she was just 8, knocking them unconscious. She is called the "Oni Princess", which fits the mould of having a characteristic that is similar to that of a royal.

Years later, she has shown the advanced application of this through "infusing" it into her kanabo, causing dark lightning to be emitted from it. Yamato showed it during her clash against her father's Haoshoku Haki-infused Raimei Hakke using her own Raimei Hakke.

Kaido has stated that only a very handful of the strongest conquerors can utilise such a rare ability. Not even Oden unlocked such a prestigious ability. Some people that have it includes Roger, Whitebeard, Big Mom, Kaido, and most recently Luffy. All of whom are Yonko calibre or above.

Busoshoku Haki

Yamato has masterful usage of Busoshoku Haki, allowing her to harden her hand and coat her Kanabo in it, creating an effect similar to black lightning before attacking Hatcha. She can also use this Haki at an advanced degree, being able to discharge it from a great distance, hitting opponents backwards with tremendous amounts of force. Furthermore, she was able to fight and damage Portgas D. Ace, who'd eaten a Logia Devil Fruit using this branch of Haki.

Kenbunshoku Haki

Yamato possesses the ability to use Kenbunshoku Haki which is the ability to sense the presence of others.


Similar to her father, Yamato's main weapon of choice is a Kanabo mace, which is somewhat more studded and slender compared to Kaido's spiked Kanabo.

Devil Fruit

Yamato ate a Mythical Zoan Class Devil Fruit known as the Inu Inu no Mi, Model: Okuchi no Makami, which allows her to willingly transform into a hybrid or full form of the wolf deity described as being the Guardian Deity of Wano. It was a valuable fruit that Kaido himself worked hard to get, however, she ended up accidentally eating it without knowing what it was out of hunger. A Mythical Zoan is said to be the rarest and most powerful of the Zoan sub types as well as also being rarer than Logia fruits.

In her full beast form, she becomes a four legged wolflike creature with flame-like aura enveloping her entire body. Her horns extends straight up and her limbs becomes more paw-like, implying that it's a transformation that focuses more on speed and agility. The heart pirates that saw her were shocked at how huge the size of her form was compared to a regular wolf.

In her hybrid form, Yamato appears to be something akin to a werewolf. Her canines are sharp, and there's a flame-like aura shown around her entire body constantly, reminiscent of many East Asia Deities. In particular, her horns also becomes more elongated. Similar to other Zoan users in their Human-Beast Forms, more so a carnivorous one with fangs and claws, Yamato has enhanced physical abilities to her already powerful base form, which allows her to fight on par against Kaido in his Human-Dragon Form.

Yamato has also mastered the fruit to the extent that she can use her cryokinesis powers in her human form, allowing her to coat and enhance herself or her weapon with ice. Without needing to go into full hybrid transformation, she can also transform any singular part of her body into the wolf deity such as hands into claws while everything else remaining human.

It was revealed that Mythical Zoan fruits are special as they choose their users. For example, the Nika fruit chose Luffy to represent freedom while also escaping the world government's grasp for centuries. In a similar vein, the Makami fruit has also chosen Yamato specifically due to her desires to liberate Wano from her tyrannical father.

  • Namuji Hyoga: In her Hybrid form, Yamato releases an ice elemental breath from her mouth. It was seen being able to clash and completely negate Kaido's own Bolo Breath.
  • Kagamiyama: Mirror Mountain: Yamato encased herself in Ice Shards which acts as a protective barrier around her as well as removing exterior damages to her body after being released. This attack was strong enough to defend against Kaido's Haoshoku Haki infused Raimei Hakke.
  • Himorogiri: Hallowed Glacier Slash: Yamato spins her Kanebo quickly and using her momentum, she unleashes an overhead swing at her opponent. This acts as a decoy and after averting their attention, she then uses her claws to strike down her enemy. This attack was strong enough to bring Kaido to his knees momentarily.

List of Attacks

Since Yamato uses a Kanabo similar to Kaido, most of the attacks seen thus far comes from her using her club to attack her opponents with incredible force.

  • Raimei Hakke: Thunderclap Eight Trigrams: Yamato uses a signature attack of her father, where she lunges at her foe at blinding speed and swings her Kanabo with tremendous force, infused with Busoshoku Haki. It can be amplified further using Haoshoku Haki. It was powerful enough to deal significant damage to Ulti in her full-beast form, knocking her out of her transformation, and making her lose conscious. The strike does not need direct contact to work due to the advance application of Haki. After waking up moments later, Ulti attempted to downplay it by calling it Raimei Yonke with disdain, but coughed up blood soon afterward. She was able to negate Kaido's attack with this move and even caused him to bleed after their clash.
  • Narikabura: Ringing Turnip: Yamato hardens her hand and coats her Kanabo with Busoshoku Haki. She then unleashes a fast vertical projectile to hit her opponent from a distance. It is incredibly potent as it was able to knock out Hatcha, an artificial ancient giant in one shot.
  • Shinsoku Hakujaku: Divine Step White Snake Dash: Yamato imbues her Kanebo with a dense amount of Haki and dashes at her opponent at blinding speed before swinging her weapon using both hands, emanating a lightning trail after her attack lands. This attack was fast enough to land at the same exact moment as Luffy's Gear 4 Snakeman Jet Culverin. When combined with Luffy, it was also powerful enough to send Kaido flying back and forcibly make him transform back into a dragon.
  • Mahoroba: Horse Phantom Blade: While still in her human form, Yamato coats her weapon with frost and swings it at her foe horizontally.


  • The story behind Yamato eating her Mythical Zoan Devil Fruit is similar to Luffy who ate his Gum Gum Fruit (actual name Hito Hito no Mi, Model: Nika) unknowingly. Both fruits were discovered by an Emperor and was said to hold great importance to their world.
  • Additionally, both fruits are Mythical Zoans and while also having divine origins above that. Yamato's fruit represents the Wolf Deity while Luffy's fruit represents the Sun God Nika.
  • On February 28th 2021 at 2:59 PM UTC, Yamato attained 11th position overall in the 1st Global One Piece Popularity poll, garnering 259 738 votes despite only appearing in the manga for a few chapters and lacking a cameo in the anime.
  • This was the first popularly poll she appeared in and out of 1174 characters, she achieved 3rd in Oceania (18724), 4th in Africa (16934), 7th in the Middle East (16012) and in Latin America and the Caribbean (33328), 8th in North America (60774), 10th in Europe (35392), 12th in Asia (20652) and 15th in Japan (57922).

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