Brook

"Soul King" Brook is a member of the Straw Hat Pirates, serving as musician after drifting into the Florian Triangle for 50 years. He is a Devil Fruit user who ate the Yomi Yomi no Mi, and is undead, having been brought back into a pseudo-immortal state because of its powers. His dream is to, after sailing around the world, reunite with his old friend, Laboon, at Reverse Mountain, where he resides with Crocus. Before joining the crew, he acts as the main ally of the Straw Hat Pirates during the Thriller Bark Arc, joining at the end of the same arc, being the ninth member of the Straw Hat crew, and the eighth to join, as well as being the oldest member of the crew and the second tallest member on board after Jinbe. During the two-year timeskip, Brook had become a world-famous celebrity and rock star, but after having his final concert on Sabaody Archipelago and his identity as a pirate revealed to the world by the Marines, he gladly gave up the life of a star and returned to the crew. He is also one of the two swordsmen onboard their current ship, with the other being Roronoa Zoro. He fills the role of the long-awaited musician that Luffy had wanted for his crew ever since his journey began. He currently has a bounty of Beli83,000,000. As much as Brook normally goofs around on the ship engaging in acts of silliness with Luffy, he is still a formidable opponent. Due to his previous experiences and skills that he amassed from the days when the Pirate King Gol D. Roger was still active, Brook, in all respects, is a veteran pirate (though these attributes are somewhat downplayed by his overall demeanor, along with the fact that his isolation in the Florian Triangle seemed to have eroded his knowledge of modern society).

Brook's skeletal body allows him to perform a wide variety of acts that would be impossible or fatal for a normal human to do. As long as his body remains solid and intact, he will live, and he can easily repair any bone damage simply by consuming milk. He can even survive having his head cut off, continuing to talk, smell, and see while it is detached. However, he is still capable of feeling pain. Due to his lack of flesh, Brook is resistant to lightning strikes and high and low temperatures. Brook does not age, as his body only consists of bones and he continues to grow stronger despite being 90 years old. He is capable of storing objects inside his skull, such as a Tone Dial and Poneglyph rubbings. Brook's light weight as a result of his skeletal body makes him the fastest member of the Straw Hats. He can run across water without sinking, and jump extremely high into the air. Brook frequently uses his tremendous speed in battle, allowing him to take down opponents with attacks too quick for them to see. He was able to purify an entire horde of Soldier Zombies before any of them could react, and was capable of catching the Yonko Big Mom and her homies off guard with his attacks. Brook is a virtuoso musician who is extremely skilled in playing all kinds of instruments, particularly the violin, his favorite instrument. After he was separated from the Straw Hats, Brook picked up the guitar and, within two years, he became so highly skilled in the new instrument that he came to be regarded as a world famous rock star.

At testament to this fact, his records in Tone Dials sold in the millions, and his fans during his final world tour stop in Sabaody Archipelago were either crying or fainting at his presence. Brook can masterfully play enchanting songs that are so melodious they can completely captivate even animals like Laboon, who used to sing along to Brook's music. In addition to singing  and playing music, Brook is also a skilled composer, having composed songs such as "Bone To Be Wild" and "New World", which proved to be very fashionable among music fans and lovers. While he was still alive, Brook ate the Yomi Yomi no Mi, a Paramecia-class Devil Fruit that allowed his soul to return to his body after he died. This allows him to reside within a skeleton body, and he can even perform the functions he did when his body contained flesh and muscle. Other than bringing him back from the dead, Brook's fruit initially seemed useless. However, after the timeskip, he discovered that he could exercise the power of his soul, which he discovered is what allows him to animate his body. He can separate it to move independently of his body. This leaves his body a lifeless husk, but as a spirit, Brook is capable of moving through walls and going to areas that would be impossible for him to physically reach, though he cannot grab hold of anything. He is capable of exerting his soul power to affect beings with weaker souls such as homies. This soul energy exudes coldness, called the "chills of the Underworld", and allows Brook to transfer this freezing aura to objects like his sword. With this aura, he is capable of freezing his surroundings, as seen when he turned the ground around him on Zou into ice.

Brook uses a type of sword called a shikomizue, a sword concealed inside a cane. He uses this sword in conjunction with his fencing skills and has had it for at least fifty years. As a former battle convoy leader and pirate captain with years of experience in the Grand Line, Brook is a master in swordsmanship. Despite his usual goofy personality in battle, he is an extremely skilled Gentle Blade type swordsman who is able to dispatch numerous enemies at once with swift and precise strikes. His swordsmanship is a combination of classical fencing and iaidō. Brook's Gentle Blade style is more focused on speed and precision while Zoro's style is more focused on power and thus uses a tremendous amount of physical strength. Brook was unable to defeat Ryuma no matter how hard he fought and while Ryuma only used a fraction of his power, he noticed that Zoro was able to defeat him at full power with only two of his swords, although Ryuma did say that Brook's protectiveness of his afro held him back somewhat. While at Sabaody Archipelago, two years ago, he struck a Pacifista using a high speed sword attack, yet failed to do much damage to it and had to be rescued afterward. However, when Zoro attacked the same Pacifista, the results were very different. He was able to keep up with what Zoro was doing while he watched the swordsman fight Ryuma, showing his sharp perception for swordsmanship. He works very well with Zoro, as they defeated a Flying Fish Rider together. After the timeskip, Brook has named his sword "Soul Solid", due to him developing the ability to coat it with the aura of his soul, freezing it in the process, and anyone who comes into contact with it. He also claimed that the Longarm Tribe has helped him sharpen the sword. His power and skill in swordmanship has also increased to the degree where a samurai from Wano has commended his skill and he is also now able to use flying slashes as well, which were on par with Zoro's and Kin'emon's. Like Zoro, Brook can now cut materials that are harder than steel as he was able to cut down a dragon, whose scales are tougher than steel.