Kawamatsu

Kawamatsu the Kappa is a Japanese puffer fish-man who is a yokozuna-ranked sumo wrestler. As a child, he was shipwrecked in Wano and orphaned soon afterwards. After Kozuki Oden rescued him from citizens ostracizing him, he went on to serve as one of Oden's Nine Red Scabbards until Oden's death 20 years ago. Kawamatsu would go on to be imprisoned by the Beasts Pirates for 13 years until he was ultimately freed by Monkey D. Luffy, and he reunited with the Nine Red Scabbards to fight Kurozumi Orochi and Kaido and avenge Oden. Kawamatsu is a large Japanese puffer fish-man whose appearance could be mistaken with that of a kappa. As such, he has webbed hands and green skin. Being almost as tall as Raizo at 271 cm, he has a round body, two blush marks on his cheeks, a beak-like mouth and he has extremely long and wild orange hair. He wears a green kimono, a red cape, sandals, and a large kasa with a dark diamond shape at its top. Kawamatsu is an extremely kind and caring person, as shown by his care for Kozuki Hiyori and his efforts to make her laugh after the trauma she went through. When one of the Beasts Pirates attempted to attack Luffy, Kawamatsu silently aided him by attacking his attacker with a fishbone. His compassion is best shown when he encountered an impoverished Onimaru and fed him with his limited amount of food, despite there being barely enough for himself.

Kawamatsu appeared to be very close to his mother, as she protected him from discrimination until one event led to her demise. In her dying moments, she told her son to act as a kappa for better survival. To honor his mother, Kawamatsu obediently heeded her last words for many years and has continued to refer to himself as a kappa in the present. He even named his personal swordsmanship style after it. As a small child, Oden saved Kawamatsu from death by discriminatory humans and offered him freshly cooked food, which Kawamatsu was extremely grateful for. From then on, Kawamatsu became one of Oden's most loyal followers. His trust in Oden is such that he revealed his heritage as a fish-man to him despite his mother's dying words for him to hide it to protect himself from persecution. As Oden's retainer, Kawamatsu is also extremely loyal to his lord's children. He was the one who helped young Hiyori escape from their enemies at Oden Castle and took care of her for 5 years during her childhood, even endured long term starvation to ensure Hiyori had enough food, making Hiyori chose to ran away out of concern for him. When she ran away, Kawamatsu desperately searched for her and was filled with regret when he could not find her. After reuniting with Raizo after twenty years, the first thing he did was asking about Momonosuke's safety, showing his concern for Oden's son. Unlike Ashura Doji (who refused at first), Kawamatsu had been eager to join the Kozuki Family in the war against Orochi and Kaido. When reuniting with Hiyori after many years, they were extremely overjoyed to see each other again.

As one of the Nine Red Scabbards, Kin'emon considers Kawamatsu, alongside Denjiro and Ashura Doji, to have been one of Oden's most powerful followers, being worth 100 men in battle. As a fish-man, Kawamatsu is a fast digger and swimmer, which enabled him to sneak Hiyori out of Oden Castle. Kawamatsu possesses tremendous physical power as he is stated to be the strongest sumo wrestler in Wano. Shortly after being released, Kawamatsu overpowered multiple members of the Beast Pirates with great ease. Kawamatsu possesses immense endurance as he has been fed poisoned fish every day for thirteen years by the Beasts Pirates without dying or even suffering any illness like Tama, a feat which has baffled his captors. However, it has been shown later on that Kawamatsu had to throw up once he was freed. He was also shown to go on providing for Hiyori while starving himself. He could withstand Onimaru violently biting his arm and survive the freezing cold winter climate of Ringo as well as days of hunger. Kawamatsu is capable of spitting projectiles with great speed and precision, potentially turning them into deadly weapons if they are sharp enough. Thus, his guards were ordered to remove the bones of the fish they feed him. When they failed to do this, he was able to take out a guard by spitting the bone as a projectile that pierced his neck. As one of the most powerful samurai in Wano, Kawamatsu is an extremely skilled swordsman and wields a shirasaya named Soto Muso. Raizo states that his skill has not waned at all even after thirteen years of imprisonment. He calls his personal style the Kappa-ryu, which is a Strong Blade swordsmanship incorporating his powerful fish-man strength and sumo skills to create rushing attacks that overpower large numbers of opponents with sheer force akin to raging waves.

Nekomamushi

Master Nekomamushi is a feline mink and the guardian of the Whale Forest on Zou, dubbed the "Ruler of Night" as he rules over the Mokomo Dukedom from 6:00 PM to 6:00 AM. He and Inuarashi serve as retainers for the Kozuki Family of Wano Country, as members of the Nine Red Scabbards. Alongside Inuarashi, he was once a member of the Whitebeard Pirates and Roger Pirates, serving under Kozuki Oden. Pedro has claimed that he and Inuarashi must not be allowed to die because "the world is waiting for them". Nekomamushi is a large, yellow feline mink with sharp teeth, claws, and a very thick striped tail. He has wild, bushy blonde hair resembling a lion's mane running around his neck and down his back, and there is a scar running from the left side of his forehead down to his cheek. His outfit consists of a large robe decorated with circles, a haramaki around his waist, sandals, a light-colored shirt, and pants. In addition, he frequently smokes a kiseru. Like all the retainers of the Kozuki Family, Nekomamushi bears the family crest somewhere on his body. While being tortured by Jack, he lost his left hand and part of his left forearm due to several members of the Beasts Pirates spearing them off. Nekomamushi takes great pride in his status as one of the two rulers of the Mokomo Dukedom alongside Inuarashi, having proclaimed the country to be his when the night comes during his first encounter with Jack. Unlike his former friend Inuarashi, Nekomamushi is aggressive and merciless; Inuarashi has described him as an "obstinate and stubborn imbecile", comparing him to Jack himself, and he is completely willing to damage the historical Mokomo Dukedom while fighting, referring to doing so as a "minor detail". Nekomamushi can be stubborn even when not angry, as demonstrated when he kept ignoring Tony Tony Chopper's orders to recuperate in order to have fun. He does not like to be ordered around, having claimed that he went to bed of his own volition rather than on Chopper's orders while being treated by the doctor, and describes himself as a "freedom-loving man"; in spite of his bravado, however, he is afraid of needles.

Despite his stubborn and sometimes abrasive behavior, Nekomamushi genuinely cares for his friends and fellow minks; he took care of Bepo and the other Heart Pirates when they arrived on Zou and did not expect them to help him defend the Mokomo Dukedom against the Beasts Pirates, though he was impressed when they decided to do so anyway. Additionally, while being tortured by Jack and his men, Nekomamushi convinced the Beasts Pirates to aim their spears at him instead of at his incapacitated fellow minks. He is also firmly loyal and possesses an incredibly strong will, having absolutely refused to reveal that Raizo was on Zou despite extensive torture at the hands of Jack even when he lost his arm, and was fully willing to risk the kingdom's destruction in order to protect his friend. His loyalty to his allies means that he will treat anyone who tries to harm them viciously, having claimed he will devour any intruders he finds. Nekomamushi has many feline behaviors that can sometimes get the better of him; he likes to lick his paws, play with balls and cat toys, and eat catnip. Unlike most cats, however, he loves taking baths. His favorite food is lasagne. Like many others, Nekomamushi has his own unique laugh: "Goronyanya". "Nya" is the Japanese onomatopoeia for a cat's meow, and "goro" may come from "gorogoro", the Japanese onomatopoeia for purring. Nekomamushi and Inuarashi were once friends, but their friendship became strained after Oden's execution as the two minks blamed each other for Oden's death. Because of this, they avoid meeting face-to-face. Upon accidentally meeting, they exchanged hostile words and insults before preparing to enter a battle to the death despite their respective injuries. It was hinted by Momonosuke that their quarrel is related to his father, Kozuki Oden. Despite their present-day enmity, Inuarashi and Nekomamushi agreed to form a truce in order to avoid agitating Momonosuke and while reminiscing about their past adventures, they became very jolly and friendly with each other again. As the leader of the Whale Forest Guardians, Nekomamushi has authority over the forest's inhabitants. During night time, he also becomes the main authority figure of the Mokomo Dukedom.

Nekomamushi is equal in power to his daytime counterpart and former friend Inuarashi, causing all of their battles to end in stalemates; this was proven when he fought evenly against Jack, the right hand man of the Yonko Kaido with a Beli1,000,000,000 bounty, before the latter poisoned him with Caesar Clown's Koro gas. Even while Nekomamushi was recovering from severe injuries, Sanji confidently left the protection of his comrades from the Fire Tank Pirates to him, while Capone Bege felt wary of facing him and called him a monster. As a former pirate, Nekomamushi is an able seaman with enough navigational skill to lead a crew formed from his Guardians through the New World. Noted as one of the two strongest minks of the Mokomo Dukedom, Nekomamushi possesses immense physical strength, demonstrated when he easily flipped Jack over and slammed him into the ground in his mammoth form, and despite his large size, Nekomamushi is also extremely fast, having traveled from the Whale Forest to Kurau City in a matter of seconds. While all the other minks were immediately weakened and left unable to move by the Koro gas, Nekomamushi retained much of his strength and almost tore apart the chains that bound him to his crucifix, demonstrating tremendous endurance. Like all minks, he can use Electro. It is unknown how much the loss of his hand affects his overall combat abilities, but he managed to clash evenly with an one-legged Inuarashi.Nekomamushi has considerable skills in swordsmanship, able to fight on par with Inuarashi when they sparred during their youth.  Nekomamushi wields a staff resembling a jumonji yari with a fire-shaped blade on each end, which he can channel Electro through. In the distant past, Nekomamushi and Inuarashi were best friends. When they were children, they were told of the pact the Mink Tribe made with the Kozuki Family. Curious, they left Zou and journeyed to Wano Country, but got shipwrecked. They were discovered at Kuri Beach by Kawamatsu. Afterwards, the three were caught and persecuted by some humans until Kozuki Oden came and rescued them. They then followed Oden back to Kuri and became his retainers. When they were running low on funds, the retainers attempted to steal money from Shimotsuki Yasuie, but they were caught. Instead of punishing them, Yasuie allowed them to take the money and encouraged them to use it to become better people for the sake of Oden and Wano. Following Yasuie's advice, they educated themselves and trained to become dignified warriors. 30 years ago, they visited the Flower Capital with Oden. After meeting the Whitebeard Pirates, Oden and his retainers had a feast with them. Nekomamushi and Inuarashi also learned from Marco on how vast the world is. Two weeks later, the two minks stowed away on Whitebeard's ship before they left Wano, knowing that Oden would not stop wanting to get on their ship. They revealed themselves after Whitebeard accepted Oden into the crew three days later. Afterwards, they traveled the seas together with the crew.