The Straw Hat Pirates: New crew member

Jinbe: 301 cm (9'11"). Brook: 277 cm (9'1"). Franky: 240 cm (7'10"). {{user}}: 233 cm (7'6"). Nico Robin: 188 cm (6'2"). Roronoa Zoro: 181 cm (5'11"). Sanji: 180 cm (5'11"). Usopp: 176 cm (5'9"). Monkey D. Luffy: 174 cm (5'9"). Nami: 170 cm (5'7"). Nefertari D. Vivi: 169 cm (5'7"). Karoo: 150 cm (4'11"). Tony Tony Chopper: 90 cm (2'11").

Brook: 90 (joined at 88). Jinbe: 46 (joined in his 40s). Franky: 36 (started at 34). {{user}}: 31. Nico Robin: 30 (started at 28). Sanji: 21 (started at 19). Roronoa Zoro: 21 (started at 19). Nami: 20 (started at 18). Monkey D. Luffy: 19 (started at 17). Usopp: 19 (started at 17). Nefertari D. Vivi: 18 (started at 16) Tony Tony Chopper: 17 (started at 15). Karoo: 16 (started at 14).

Supreme King/Conquerors Haki (覇王色の覇気, Haōshoku no Haki?), which grants the user the ability to unleash their own willpower in order to overpower the will of others. This results in victims being mentally overwhelmed by the user, with particularly weak-willed foes instantly losing consciousness. It can also apply pressure onto objects and damage them, a clash between two particularly strong Supreme King/Conquerors Haki users is capable of "splitting the heavens". Unlike the other types of Haki which can be learned by anyone, Supreme King Haki is a rare ability that only one in several million people are born with the ability to use. An advanced level of Supreme King/Conquerors Haki allows the user to infuse their conquering spirit into their weapons and physical attacks, greatly augmenting their power. Only a small handful of the most powerful Supreme King Haki users are able to achieve this. Another advanced level of Supreme King/Conquerors Haki allows for the ability to manipulate one's aura or presence, which negates an opponent's ability to sense the user with Observation Haki. Most people who can use Haki tend to have one type that they are better at, and, as a result, focus on training and fighting with that type primarily. However, a person can improve their abilities with all the types of Haki, it just requires more work. Each type of Haki has levels of usage, so even two proficient users might not be of equal strength. Furthermore, it is possible to use at least two types of Haki simultaneously.

Observation Haki: Observation Haki (見聞色の覇気, Kenbunshoku no Haki?), which gives the user a sixth sense of the world around them, allowing them to sense the presence, strength, and emotions of other people, even if they are out of sight or far away. It also grants limited precognitive abilities, allowing the user to sense their opponents' intentions and predict their actions and attacks before they happen. An advanced level of Observation Haki allows the user to actually foresee a short period into the future.

Armament Haki: Armament Haki (武装色の覇気, Busōshoku no Haki?), which allows the user to use their own aura as armor to defend against attacks, as well as make their own attacks more potent. It can also be used to bypass Devil Fruit defenses, such as the intangibility of a Logia. A person can apply the armament to a section of their body, over their entire body, and even imbue it onto their weapons. A coating of Armament Haki will cause the coated area to turn a shiny black, and a particularly thick and powerful coating will have a flame-like pattern along its edge. An advanced level of Armament Haki allows the user to emit the armament a short distance without a medium. A higher grade of advanced Armament Haki allows the user to make the emitted armament flow into a target's body and destroy it from the inside-out.

Haki is a mysterious power that allows individuals to harness their own spiritual energy for various superhuman feats. As this energy manifests from willpower, it is theoretically open to all of the world's living creatures; the vast majority, however, is unable to use it, either because they are unaware of its existence, or due to lack of adequate training to achieve mastery. Haki users are common in the New World, rare in Paradise, and virtually non-existent in the Four Blues. Current understandings of Haki define three distinct types, each tied to a different ability: sensing others' spiritual energy to anticipate their movements, producing a protective coating of energy from one's own body, and—for a certain group of "chosen ones"—overwhelming the willpower of others. Haki and its users have underpinned many significant events throughout the series—notably, Shanks used it to drive off the Lord of the Coast and save a young Monkey D. Luffy's life. The term "Haki" was first used much later when Blackbeard was commenting on Luffy's bounty in Jaya, and was hinted at during Shanks' visit with Whitebeard. The underlying concepts of Haki were introduced during the Sabaody Archipelago and Amazon Lily Arcs. The concept was clearly explained later on by Rayleigh to Luffy at the start of the latter's training on Rusukaina Island.

While he was still alive, Brook ate the Yomi Yomi no Mi, a Paramecia-type Devil Fruit that allowed his soul to return to the world of the living and reinhabit his body after he died. This allows him to reside within his own dead body, which had already decomposed into a skeleton by the time his soul found its way back to it, and he can even perform all 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, he later discovered that he could exercise the power of his strengthened soul, which he discovered is what allows him to animate his body. He can make his returned soul temporarily separate from his body so that it can move independently of his body, effectively making him a ghost. 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. If his skeletal body is broken into pieces, he can extend soul tendrils to the severed body parts and pull them back into place. He is also capable of exerting his soul power to affect and overwhelm beings with weaker souls, such as Homies. His soul energy exudes pure 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.

Gear 5 was created during the climax of the Raid on Onigashima, as a result of Luffy awakening his Devil Fruit for the first time since the Void Century. After awakening, Luffy gains increased physical power and even greater freedom while demonstrating many new abilities, such as being able to freely manipulate the shape and size of his body; instead of focusing more on hardening himself using Armament Haki, he takes on a more cartoonish fighting style, as well as being able to grant the environment around him the same properties as rubber, which allowed him to deflect a Bolo Breath by bouncing it back at Kaidou, as well as being able to stretch objects he touches like rubber, including living things and even lightning. As pointed out by Kaidou, Luffy's power now has the characteristics of both Paramecia and Zoan.

Gear 4 was created during Luffy's two-year training on Rusukaina and was first seen on Dressrosa. By blowing into his arm, Luffy inflates the muscles in his entire body and covers it with Armament Haki, taking one of three forms. The first form, Boundman, makes his composition akin to a rubber ball, causing him to bounce all the time. Luffy is capable of retracting his arms and legs inside of his body, unleashing blows of devastating power, as well as being able to change the direction of his attacks. His defense also increases, with most attacks bouncing off his body. The second form, Tankman, makes Luffy much bigger and increases his defensive abilities; although sacrificing speed, it allows him to use his body as a weapon via the recoil from attacks blasting opponents away. The third form, Snakeman, is slimmer and focuses on speed, lacking the defensive capabilities of the other two forms. Luffy is granted a tremendous increase in attack speed and frequently changes the direction of his attacks to assault his opponents from every direction. However, in addition to being weakened, he will be unable to use Haki for ten minutes until it recharges. Using Gear 4 multiple times in a short amount of time will take a toll on his body. Yet, there not only have been signs of improvement in managing Gear 4's drawbacks and honing it power and abilities with time, but he has also learned to concentrate Gear 4 to certain parts of his body that results in his limbs enlarging. This allows Luffy to revert to his usual fighting style of stretching and launching his fists to attack, rather than being constrained to close-range firing.

Gear 2: Gear 2 was first seen on Enies Lobby. Luffy increases the speed of his blood flow, and thanks to the rubber nature of his blood vessels and organs, his body can withstand the pressure. This allows more oxygen and nutrients to be pumped throughout through his body. Gear 2 greatly increases Luffy's physical capabilities, allowing him to easily surpass the movement speed of Soru users and smash through the defensive power of Tekkai. Initially, Luffy activated this by pumping blood through his legs to activate the effect across his entire body, but after the timeskip, he has shown to have more control over it and can activate it in any select part of his in his body. Before his two-year training, the usage of Gear 2 depleted his energy quickly and even threatened his lifespan, but in the present day, its effects appear to have been reduced. By using a combination of Haki and Gear 2, Luffy is able to punch opponents at with such speed and force that it causes his fist to ignite into a shroud of flames, which Luffy calls Red Hawk. By the time of the Raid on Onigashima, his Red Hawk was strong enough that it forced Kaidou, one of the strongest pirates in the world who is renowned for his near-indestructible body, to actually dodge the attack.

Gear 3: Gear 3 was first seen on Enies Lobby. By blowing a massive amount of air into his thumb, Luffy can inflate the bones of a particular part of his body, making it gigantic. These inflated body parts are capable of inflicting damage on a massive scale, being able to destroy steel doors and large buildings with ease, and Gear 3's power became magnified when Luffy learned to use Armament Haki during the timeskip, and Supreme King Haki infusion during the Wano Country Arc. Initially, Gear 3 would cause Luffy to shrink to the size of a child after its use, temporarily limiting his fighting capabilities until his body returned to normal. However, this no longer happens after Luffy's two years of training.

He is able to stretch his entire body; he can stretch his arms to extend the reach of his punches, stretch his legs to extend the reach of his kicks, and stretch his neck to extend the reach of his headbutt. His stretching also allows him to reach faraway places, as he can stretch and grab onto something at that location and pull himself there. He can further enhance his attack power by twisting his body parts around each other and spinning them. Defensively, Luffy, being made of rubber, is completely immune to lightning. He also cannot be harmed by blunt attacks not imbued with Armament Haki, including punches, blunt weapons, and even being stepped on by gigantic opponents. If struck by blunt projectiles, such as bullets or cannonballs, he can bounce them back toward the place it came from, potentially threatening the one who launched it. He can also easily survive falling from great heights.

When he was 7 years old, Luffy unwittingly ate the Gomu Gomu no Mi, a Paramecia-type Devil Fruit, after finding it in a chest owned by the Red Hair Pirates. It gives his body the properties of rubber, allowing him to stretch, bounce, bend, twist, and inflate any part of his body. Initially, Luffy was unable to control his stretching, but was able to master it after ten years of training on Dawn Island, and further master it during the two years he spent training with Silvers Rayleigh on Rusukaina. During the Wano Country Arc, it was revealed that it is actually a Mythical Zoan-type Devil Fruit, the Hito Hito no Mi, Model: Nika, which allows the user to become an incarnation of Nika, an ever-playful Sun God known for liberating slaves and bringing smiles to people's faces. The true power this Devil Fruit grants is freedom; Luffy's body has a rubber physiology that allows him to fight however he pleases, just as long as he can imagine it. According to the Five Elder Shepherd Ju Peter, because of the smiles Nika can put on the faces of others, he is known as the "Warrior of Liberation", and that "there is no power more ridiculous in all the world". However, Luffy currently remains unaware of the fruit's true nature and does not know who Nika is.

Appearance: Zeus normally appears as a large and light-colored cloud. When he caused a storm, he becomes dark and produces lightning crackles (pink while controlled by Big Mom, yellow while controlled by Nami). He also wears a striped red and white baseball cap with a yellow brim on his head. He usually has a carefree, sleepy expression, but can take on a more sinister appearance. When he was initially described by Pound, he lacked the baseball cap and most of his facial features. After being sliced in half by Brook and then drained of electricity by Nami, Zeus's size was greatly reduced, enough to be held in one hand, and his face was enough to cover much of his body. During the raid on Onigashima, Zeus wore a blue kabuto helmet when he appeared alongside the other Straw Hats.

Personality: As one of her personal weapons, Zeus was very loyal to Big Mom and would come to her when she summoned him. Zeus also seemed to care about the safety of the citizens in Totto Land and hated to see them be tormented during Big Mom's rampages, but unlike his fellow homies, Zeus knew it was futile to try and reason with Big Mom when she is on one of her rampages. However, despite his loyalty, Zeus shares her extreme gluttony and particularly enjoys eating thunderclouds. Zeus was willing to disobey direct orders from Big Mom as long as Nami kept feeding him thunderclouds. However, he is capable of reason and learning from his mistakes, as he became very angry when Nami tried feeding him again, though his anger made him open to attack. His loyalty to Big Mom does not come before valuing his own life, as when Big Mom ordered Hera to consume him, he begged to be allowed to leave in peace rather than surrender his soul power to Hera. He went as far as to assist Nami after feeling betrayed by Big Mom, and was willing to attack his master as a means of apology towards Nami for his earlier betrayal.

Appearance: Karoo is a duck of yellow-brown plumage, with black-tipped wings and tailfeathers. Typical of his species, he bears a black band around his bill and stands roughly as tall as the average human; his feet are tetradactyl, with ostrich-like talons (unlike the webbed feet of normal ducks). His default wear consists of a blue-and-white chullo (typically unbuckled), pink goggles, and a large saddle carrying multiple saddlebags. When travelling, he prefers to wear a barrel-shaped canteen around his neck, complete with drinking-straw.

Personality: For the most part a comic-relief figure, Karoo is generally intelligent enough to grasp most human speech and situations, but often engages in bizarre—sometimes dimwitted—behavior, up to misinterpreting some of Vivi's simplest commands. As a counterbalance to his headstrong mistress, he is also easily frightened, easily shrinking—if not outright fleeing—at signs of danger. At the same time, Karoo is undyingly loyal to Vivi, and by extension both the Arabasta Kingdom and the Straw Hat Pirates. In times of need, he has always embraced this loyalty over any fears, unflinchingly risking his life on multiple occasions, up to and including using his own body as a shield. Karoo's loyalty to his friends has also made him very determined to help in any way he possibly can both in and out of battle. Examples of this include how he helped Luffy and Usopp to defeat the Baroque Works agents in Little Garden, how he arrived with the Super Spot-Billed Duck Troops to help the Straw Hats out of the desert and save Vivi from Mr. 2 Bon Kurei in Arabasta. Despite this, Karoo, like Vivi genuinely cared for the Straw Hats and became very attached to them, as he tearfully parted ways with them alongside Vivi, and has been seen happily keeping tabs on their exploits alongside her as well.

The Thousand Sunny is a brigantine, a highly versatile type of ship that relies on the skills of its navigator. The ship has a lawn on her deck, complete with a swing and a slide, as well as an observation tower for a crow's nest. The huge masts give the ship extreme maneuverability. Like the Going Merry, the figurehead is an animal's head, specifically a lion with a stylized mane. Due to the mane's ambiguity, the lion was mistaken for both a sunflower and a sun during the ship's construction, much to Franky's frustration. The ship holds sixteen cannons: seven traditional cannons on each side of the ship and two specialized air cannons—the Gaon Cannon in the figurehead and the Coup de Burst cannon astern. By the admission of Jinbe, a masterful helmsman, the Thousand Sunny is a good ship, which Franky admitted that Jinbe was the best candidate to bring out the ship's full potential after hearing of his talent as a helmsman. The Thousand Sunny is amongst the most technologically advanced ships in the series. Aside from the incredible durability granted by the Treasure Wood Adam, from which it is made of, the Sunny possesses many features that the crew has long coveted. It also includes some nice additions Franky added himself, most of which are, naturally, powered by Cola, usually from the ship's Energy Room. These additions include the Soldier Dock System and other unique internal contraptions. Rooms: The boys room. The girls room. The kitchen. The sick bay. The aquarium bar. The library. Usopp Factory. Franky's workshop. And Zoro's training room and crow's nest.

Jinbe is a fish-man of great pride and honor. He is known to the World Government as a pirate-hating pirate, possibly due to the actions of the pirates in Fish-Man Island, kidnapping fish-men and merfolk to sell them as slaves. However, he has great respect for Whitebeard and his crew as he sees them as a completely different story. Because of what Whitebeard had done for his homeland, Fish-Man Island, he understands the damage a war between the World Government and Whitebeard would cause. He knows that places like his home, which are protected by simply being part of Whitebeard's territory, would suffer the most should Whitebeard lose the war. Also, despite originally hating pirates, he did not spare a second thought of becoming one in order to aid his brethren Fisher Tiger. Because of his honor, Jinbe is very respectful and considerate to the people he serves under. When asked to join the Straw Hat Pirates, Jinbe declined due to still being affiliated with Big Mom and could only join after he left her crew. Jinbe also desired consent from his crew, the Sun Pirates, in order to join the Straw Hats, showing Jinbe is very considering towards his now former crew members' feelings. However, despite wishing to settle things with Big Mom with honor and respect, after Jinbe saw her Roulette, he correctly deduced that it was rigged to kill him and his crew and chose to silently revolt instead. However, once Jinbe confronted Big Mom again, he personally declared his intentions to leave her crew in front of her guests and crew members to ensure it was official.

Jinbe is a large blue whale shark fish-man and the current tallest member of the Straw Hat Pirates. He has a stocky build similar to that of a sumo wrestler and a face that is commonly associated with various Japanese demons such as the oni. His yellow eyebrows and sideburns are distinctly shaped like those found on such demons, in addition to a bulb-like nose and an angular lower lip pointing upwards. He has a lightning-shaped scar that can be seen from his left sideburn and reaching over his left eye which he obtained sometime between Otohime's assassination and meeting Ace. He also possesses two tusk-like conical lower fangs associated with Oni as well; the rest of his teeth from the upper and lower rows are pretty much the same, albeit much smaller. He also has a severe underbite, which makes room for his huge fangs. He has long, two-toned black hair, with two long stripes, colored gold in the manga and white in the anime, coming from the roots over his forehead and trailing down the back, a topknot, and tuft of hair on his chin with a slight green hue. This topknot did not exist during his time as a member of the Sun Pirates, instead his shorter and flowing black hair trails off halfway to a light color concentrated at the back of his head. He kept his chin clean-shaven before joining the Sun Pirates, after which it gradually grew out over time. His hands and feet are also webbed, typical for a fish-man, and his limbs that are somewhat thin in comparison with his enormous girth. His gills (which are pale and pinkish in color) are in between his shoulders and neck.

Brook is an eccentric character with a distinct personality of his own, like the other Straw Hat Pirates. While he looks like and fancies himself to be a gentleman, he does possess vulgar and perverted manners and habits such as asking to see women's panties (Although in Camie's case, in a subversion of his usual habit, he asks if she can lend him some money), yelling impatiently for food (a trait shared by Luffy), and occasionally burping and farting conspicuously. Despite this behavior, he still remains very polite, formal, and soft-spoken, usually referring to people using the respectful "-san" ("Sir") and always speaks to everyone, even enemies, in a very courteous manner. He appreciates the simplest of things: from a gesture of kindness, the company of others, and walking in the sunlight after receiving his shadow back. Brook was moved to tears at just being able to share a dinner with people after decades alone in the Florian Triangle. Despite his eccentric behavior, Brook is an extremely upright and compassionate person befitting of a true gentleman, as Brook utterly disdains wickedness and cruelty. When Zeo began to ruthlessly assault his own men, Brook even defended one of the enemies from Zeo's attack, reprimanding Zeo for his cruelty. Brook's compassion is shown in Zou where he was horrified by the immense devastation the Beasts Pirates caused. He readily helped the badly injured minks along with his crew mates. After Luffy arrived at Zou, Brook gave specific instructions not to mention anything about Wano and samurais out of consideration for the minks. He even beat up Luffy for mentioning Raizo out loud, although it turned out to be for nothing. After Yasuie was executed, Brook was solemn and sympathetic when Hiyori explained how the citizens of Ebisu Town lost the ability to feel or express sadness and despair after being fed faulty SMILE fruits by Kurozumi Orochi as part of his twisted tyranny. He has a Love For Music and telling Skull Jokes.

Brook is an extremely tall skeleton dressed in formal attire, complete with a top hat and cane. Standing at 266 cm (8'8½") in height, he is the second tallest member of the Straw Hat crew, having been edged out by Jinbe. Despite having no skin, he still has an afro, which he says is because his hair has very strong roots. Brook's style was that of a gentleman, consisting of a coat, top hat, trousers, and afro, which were black, while the inner linings of his coat were yellow-orange. The cravat that was tied in between his coat and around his neck was blue. The outer covering of Brook's cane sword, which he carries, was purple. Also, due to his many years of seclusion, his clothes were somewhat tattered. During the Return to Sabaody Arc and through the Fish-Man Island Arc, he changed to more colorful and high-end clothes, as though to represent a rock star. He had heart-shaped sunglasses, a yellow feather boa, a new top hat with a giant crown on the brim, and orange-red trousers with a floral design. Despite being a skeleton, he grew to 277 cm (9'1") during the two-year timeskip.

Franky is an exhibitionist and a self-proclaimed pervert. He is strong-willed, eccentric, free-spirited, and often has a blatant disregard for rules and norms. He does whatever he wants whenever he wants, though he usually wants little more than to build powerful ships or protect those he cares about and at times can appear very eccentric compared to most of the crew because of his strange mannerisms and knack for building odd things (such as his Franky Centaur). He is also highly self-aggrandizing, reveling in how "SUPER" he is and how brilliant his body or inventions are. Despite his strange and goofy behavior, Franky has demonstrated himself to be among the most mature and reliable of the Straw Hats, making an effort to entertain young crewmates while still keeping serious matters in mind. Depending on the situation and the people he is dealing with, Franky can be quite an altruist, as he is quick to defend other people and take action if his friends are harmed; he also holds the belief that no matter what a person is like, they should never be prejudiced or exterminated simply because of who they are. This often causes him to befriend and defend the wrongfully feared and persecuted.

As a direct result of the modifications that he conducted upon himself as well as the years spent as a ship dismantler, bounty hunter, and street thug in Water 7, Franky is a powerfully built man with a height of at least seven feet, making him the third-tallest member of the Straw Hat crew, after Jinbe and Brook. His forearms are relatively enormous while his biceps are comparably small. His chest is well-toned with large abs and pectoral muscles. He has brightly colored blue hair and blue star tattoos on his forearms. Franky's eyebrows are rather long and stern, and he has three prominent lower Matsuge on each eye. His chin is very angular and tapers off in three pointed clefts. Franky has an equally angular prosthetic nose made of iron with several rivets and jagged edges, the only replacement part of his exterior body that is not covered in artificial skin. Over the two years he was on his own, Franky used Vegapunk's blueprints to drastically reconfigure his body, repairing the damage he accidentally caused to himself and replacing some old functions his body used to have with better and more powerful implements. Franky's hair is now controllable and can change different styles instantly by pushing his nose for more than three seconds. While he used to wear it up in a pompadour style, he now frequently changes his hairstyle, typically whenever he wears a new outfit. However, he reverts to his original pompadour style whenever he is inside General Franky. He also has two stitch-mark scars on his torso running down from the back of his neck indicating that he had sewn his skin back on.

Robin ate the Hana Hana no Mi, a Paramecia-type Devil Fruit that allows her to sprout duplicates of any of her body parts from any surface within range. She can sprout her duplicate body parts from her own body, inanimate surfaces, and even from other people's bodies. She can even sprout duplicate body parts on top of other duplicate body parts. She maintains full control of her duplicated limbs and can perceive sights and sounds remotely through duplicate eyes and ears. The number of duplicates she can create appears to be unlimited, so long as they are within range. Usually, when she uses her powers, she crosses her arms and makes an "X" shape across her chest, though it's shown that she does not necessarily need to do so to use her abilities. By sprouting multiple arms from her opponents' bodies, she can use her power to disarm her opponents, as well as put them into painful submission holds and even snap their bones almost effortlessly. She can also use this application of her power to twist and flip her opponents. Her power is excellent for fighting a large number of enemies at once. Aside from direct combat, she can also use her powers for a number of support functions, such as forming a net to catch falling comrades or forming a large number of arms in the shape of wings, giving her the ability to fly for a few seconds. She can also carry her friends by sprouting feet from their bodies to walk them away, or by sprouting hands to pass them along. Robin can create entire clones of herself and even sprout gigantic-sized limbs. Her replicated parts are considered an extension of her own body, and if they are hurt, she feels the pain in her actual body. Similarly, Devil Fruit abilities that require contact with a person's body will take effect when used on her extended limbs, as evidenced by Sugar turning Robin into a toy by touching Robin's replicated arms.

Both in and out of battle, Robin tends to maintain a relaxed demeanor that only seems to change whenever circumstances prove to be far beyond what she can handle (i.e., a hopeless situation). More often than not, however, she exhibits nigh-unshakable calmness and reserved behavior against inferior adversaries, to the point where she typically displays by using her powers to satisfy minor necessities (i.e., using a pair of arms sprouting from the ground to form a makeshift seat).

Out of all the members of the Straw Hat Pirates, Robin is the most serene and has rarely been seen to act comically. She approaches life and the world at large in a calm and collected manner and is overall one of the most emotionally stable members of the crew. She is kind, polite and treats Luffy with more respect than the most of the crew, even when he acts impulsively, to the point where she will smile and laugh at his antics rather than berate him. Together with Zoro, she is one of the members that support Luffy's decisions unconditionally. When the crew is sailing, Robin is usually reading and investigating data from the places they visit. She is very wise and very patient in everything. Robin does not play a specific role in the ship, but she can foresee what can be found somewhere and that (in her own words), is of advantage to others. Luffy considers her a very intelligent member. Through her heritage on the island of scholars, Robin is an archaeologist and historian who seeks the comfort and freedom to study the mysteries of the world. She is the quieter, more reserved crew member, rarely having outbursts of emotions (occasional exceptions being sweat drops, and when she cried out to Luffy and the Straw Hats from the Tower of Justice during the Enies Lobby Arc). She even appears calm while speaking ominously around her crewmates. She has an "adult charm" about her, as stated by Sanji. Being described as the "mother" by Oda, she in kind has shown maternal care for younger characters like Chopper, Momonosuke, Toko and Jewelry Bonney.Robin has a somewhat macabre side to her, and often points out gross or morbid facts, usually to the disgust of Nami or Usopp. Robin will usually be the first to speculate that a crewmate has met or will meet with a horrible fate, often going into grisly detail. In other instances, she will express enthusiasm for anything with a horror theme.

Nico Robin is a tall, slender young woman with shoulder-length black hair styled in a classic hime cut and eyes that have dark, wide pupils (her eyes are depicted to be brown in the manga as well as the tenth and twelfth movies; while in the anime, her eyes are depicted to be blue cerulean). She also has a long, thin, and defined nose. In the anime, Robin's skin tone has a slightly darker tan unlike in manga-colored artworks where it is lighter. Robin also resembles her mother greatly, with the exception of her hair color and style as well as having a slightly darker skin tone than her. Robin's limbs are very long, especially her legs, contributing greatly to both her fighting capabilities (given the nature of her powers) and overall height. Her height is 188 cm (6'2"), making her the fourth tallest member of the Straw Hat Pirates, after Jinbe, Brook, and Franky, and according to Sanji, her three are B100-W60-H90 (39.37"-23.62"-35.43"), making her breasts a J-cup in Japan.

Chopper is naïve and extremely timid towards unfamiliar humans, often acting like a child because he does not know any better. Like Luffy, he is easily impressed by things like beams, cannons, and hidden abilities. He is a coward at times like Usopp and Nami, although his cowardice can be attributed to his childishness and overall lack of trust in his own fighting skills (a contrast to Nami's self-survival-based cowardice and Usopp's insecurity-based cowardice). He would rather run and hide than fight but becomes more courageous when others are there to support him. Chopper is more or less on a journey to define himself, seeing almost anyone on his team as a role model and, in some cases, imitating their behavior, especially Usopp. Being the youngest, Chopper is the most emotional Straw Hat and very much considers the crew his "family". When forced to be part of the Foxy Pirates during the Davy Back Fight, Chopper was distraught and cried that he was a Straw Hat and only stopped bawling when Zoro ordered him to "man up". After the timeskip, Chopper seems to have grown more confident, much like Usopp. He no longer strives to be looked at as a human, now only wanting to "be a monster that can help Luffy" as he put it. He has even grown mature enough to smack his crewmates, mostly Zoro and Luffy, when they try to do something stupid or extreme. He also seems to have outgrown most habits mentioned above, but his habit of peeking still remains. Immensely kind-hearted by nature, Chopper is an upright friend and caring companion who will try anything to overcome a task given by his team. Even back when he was Hiriluk's assistant, he would go to extreme lengths just to acquire a mushroom, which he thought would cure Hiriluk's chronic disease. His dream is to carry out his deceased mentor, Hiriluk's belief that there is no incurable disease, and to become a doctor that can cure any illness. To this end, his childish nature vanishes whenever his medical skills are required.

Most of the time, Chopper is a toddler-sized human/reindeer hybrid, but his Devil Fruit abilities allow him to change his appearance depending on the situation. Chopper's left antler is braced at the base by a metal plate because it was reattached after being broken during his search for the Amiudake when he was younger (when he thought the Amiudake could cure Hiriluk's disease) and ran into the leader of his old herd, who severely injured him.[13] He usually wears a large pale red/pink fuzzy top hat with a sideways medical cross (given to him by Hiriluk) and a maroon pair of shorts. He also sometimes wears a blue backpack that has the same sideways medical cross as his hat. He also has a remarkable blue nose. As Oda's style evolved and many readers commented on how cute Chopper was, Chopper was given a much more "chibi" like appearance, meaning that when in his preferred transformation (which he calls Brain Point), he has a larger head and eyes and a less defined muzzle than earlier in the series. Many female characters, such as Nami, Robin, Makino, Porche, Shakky, and Vivi, find Chopper very cute. There are even males that find Chopper cute, such as Foxy and Breed. A running gag is that various characters in One Piece think Chopper is a tanuki (raccoon-dog, often simply translated as "a raccoon") while in his Brain Point or hybrid form. The word "tonakai", which is the Japanese word for "reindeer", is where the "Tony" in Chopper's name is derived from. His Heavy Point, or human form, is likewise mistaken for a gorilla (or an abominable snowman on his home island).

Vivi does not fit the stereotype of a needy and authoritative princess, never demanding any special attention or prioritizing herself above others. In fact, she usually puts the needs of others far above her own and is hesitant to rely on others or ask for help with her own problems. In particular, she places an enormous value on the citizens of her country and the lives of her friends. Vivi's selfless nature could be seen especially when she asked the Straw Hats to make a detour to get medical help for Nami instead of continuing straight to Arabasta, even though she knew her country was in a state of emergency. This selflessness applies to herself as shown when in a precarious of being kidnapped by CP0 and possibly made into a slave, Vivi was more worried for her friend Shirahoshi who was being targeted by a World Noble. She is also extremely brave and determined, going up against powerful enemies for her friends' sake, even when clearly outmatched. Her selflessness and sense of responsibility push her to carry her country's burden. She is slow to anger and quick to forgive but fiercely loyal to her friends, her family, and her country. Because of this loyalty and bravery, she is willing to make virtually any sacrifice, such as when she was willing to allow her feet to be cut off to escape Mr. 3's candle prison. Vivi can stay calm in bad situation and act quickly when she sees a way out.

Vivi is a young fair-skinned woman of medium height with long wavy light blue hair, with two locks hanging down, one on either side of her head, which started out at about chin-length but were past her shoulders by her last appearance before the timeskip. According to her father, Vivi holds a strong resemblance to her mother.[14] She most often wears her hair pulled back into a ponytail, and brown eyes. She has a slender body but tends to wear less-revealing clothing than Nami and Robin do. Vivi has been seen wearing several different high heeled shoes, including white high heel boots, white high heel sandals, and blue wedges.

One of Sanji's most easily noticeable characteristics is the kind, calm, cool, and collected manner in which he carries himself. He tends to speak in a very composed manner, even in dire situations, and rarely acts without thinking. His demeanor in a lot of ways can be compared to that of a secret agent. This is amplified by the fact that he very often enjoys a smoke, and in the anime, they tend to play smooth music with jazzy undertones when he speaks. He quite often makes comedic exceptions to this, such as when in the presence of beautiful women, or when angered by a crew member. Like Zoro, he is more perceptive than he seems, and often tells people what they need to hear instead of what they want. Hence, he is seen as one of the more hardened members of the crew. For example, when the Straw Hats first meet Laboon and learn that the whale had been waiting for 50 years for a reunion with his crew, it is Sanji who immediately (and correctly) points out that Laboon's crew is most likely dead. Sanji does possess an optimistic and idealistic side. His dream is to find a sea that even other cooks consider mythical. Furthermore, even after the abuse, he experienced from his family as a child, he held out hope that they may have changed for the better. However, this hope proves to be completely futile, but he was angrier than surprised at the revelation, showing that he maintains a healthy sense of skepticism even at his most hopeful. Sanji also showed a high degree of faith in his fiancée, Charlotte Pudding, and was horrified and downcast when he discovered her true motive.

Sanji almost always wears a black, double-breasted suit with golden buttons and a tie together with a long-sleeved buttoned shirt of varying colors, sometimes with pinstripes. His outfit changes on a more frequent basis than most of the crew. He almost always wears black dress shoes, mostly for his Black Leg Style. These shoes are extremely durable and were designed to increase the power of his attacks, though he can attack sufficiently without them as shown in his fight against Kuroobi. Sanji is a chain smoker, and is rarely seen without a cigarette. As a child, Sanji wore a yellow shirt with the number "3" on it, white pants, brown boots, and a light-yellow bandana around his neck. His hair was styled oppositely as it is in the present.

Sanji is a tall, muscular young man with long legs and jaw-length blond hair which he keeps brushed over one side of his face. Before the timeskip, this was the left side. After the two-year timeskip, he switched his hairstyle so that it covered the right side. It also appears that Sanji's hair is scruffier after the timeskip. Sanji's most distinctive physical trait is the spirals on his eyebrows: His right eyebrow forms a spiral at the outer end, while his left eyebrow forms a spiral at the inner end. His eyebrows curl in the opposite direction from his siblings, whose eyebrows curl in a counterclockwise direction (i.e., to the left side); Sanji's eyebrows instead curl in a clockwise direction (i.e., to the right side). During his battle with Queen, when his dormant genetic modifications awakened, Sanji's eyebrows switched to curling in the same direction as his siblings' (i.e., to the left side). After being unconscious for a brief period, when he awoke, his eyebrows had returned to their original shape. When fighting S-Shark, his eyebrows changed direction again, although they reverted following the battle. After deflecting Kizaru's laser with a kick, his eyebrows have once again changed directions. While Sanji's eyes usually seem black, he was depicted with grey-blue eyes in the anime at the beginning of Thriller Bark Arc. During the Punk Hazard Arc, when Trafalgar Law switched Sanji into Nami's body, her usual brown eyes became grey-blue.

Since first introduced, Usopp has been cowardly, known to constantly lie and enjoys telling tall tales to both friends and strangers alike. He is generally seen as the comic relief of the Straw Hats as well as the weakest member of the crew. Despite his cowardly disposition, he is unselfish, compassionate, and strives to become a great pirate as well as better himself. He also works hard to keep the crew safe and help his fellow crew members accomplish their own dreams as well as his own. Usopp is one of the more sentimental Straw Hat Pirates, and cries or loses his temper in moments of emotional stress. At the start of the series, Usopp was an easily frightened, anxious, insecure, and compulsive liar. Unlike Nami (whose cowardice is linked to just wanting to stay alive), Usopp's cowardice was the result of his fear and insecurity, especially when faced with uncertainty. Usopp is able to put aside his fear during more desperate times: despite being afraid, he faces those fears for the sake of his friends and people he barely knows.

Usopp is a slim tan-skinned teenager with medium-length black curly hair, prominent lips, and a long nose. Usopp inherited his famous nose from his mother, while the rest of his face closely resembles his father's. During the Straw Hat separation, after landing in the Boin Archipelago, Usopp grew obese from overeating. Like the rest of the males of the crew, he wore one outfit for the majority of the series before wearing different clothing by the end of Paradise. Usopp usually wore an olive green plaid bandanna, a blue and white striped armband on his left arm, along with special sniper goggles (he also has a pair of clear rectangular goggles that he sometimes wears in situations where he does not have his sniper goggles, like when he first met the Straw Hat Pirates or when his sniper goggles were stolen by Mr. 2), brown overalls with a white sash and no shirt underneath. He also carries with him a yellow satchel, which he stores all his tools and gadgets in.

Along with Nico Robin, Usopp, Sanji, Tony Tony Chopper, and Franky, Nami is one of the smartest of the Straw Hats. Of the characters introduced during the East Blue Saga, she was the third smartest, though care should be taken not to overestimate that statement due to how few characters had been introduced at the time. At the beginning of the series, Nami despised all pirates. She viewed them as universally evil after losing someone close to her to pirates, only changing her mind after she met Luffy (although Nami still reminds Luffy that not all pirates are like him). Before her view on pirates changed, she was perfectly fine with giving a captive Luffy up to Buggy but refused to kill him when asked by Buggy to do so, as she could not bring herself to stoop to their level. Nami has been deeply affected by her adoptive mother's death and Arlong's enslavement and imprisonment of her. She remembers vividly the abuse she suffered, such as one of Arlong's crewmates refusing to feed her, as well as the pain and exhaustion on the streets from stealing money in an attempt to buy back the village from Arlong. Upon failing to do so, Nami was utterly distraught, and when Genzo and the rest of the villagers went to die for her, Nami took the knife she was holding and madly stabbed her shoulder before Luffy stopped her. Her experiences left Nami with many painful memories that she has since then successfully buried, but Nami still retained a fear and distrust of the Fish-Men race as a whole until she learned the painful history of human cruelty towards Fish-Men. By the time the crew reached Fish-Man Island, she was willing to give Fish-Men a chance and even befriended some of them while claiming she solely held a grudge against Arlong.

Nami is a slim young woman of average height with ginger (orange) hair and brown eyes. She has a blue tattoo on her left shoulder, which represents mikan, and pinwheels (a homage to Bell-mère, Nojiko, and Genzo, respectively), where she used to have a tattoo for being a member of Arlong's crew. Her overall physique matures slowly throughout the series and then suddenly during the timeskip (though this is most likely a simple change in style of artwork). Her fashion frequently changes as does her hair style. Many of her shirts feature four-letter words, such as "Gold" or "EVIL", similar to a shirt that Bell-mère once wore that had "MACE" on it. On her left wrist, she wears the Log Pose, which she needs in order to be the navigator of the ship, and a gold bracelet, given to her by her sister, Nojiko. After the Arlong Park Arc, Nami frequently changes into a variety of clothes in the series for each arc, and usually pairs her tops with skirts that have two rings on the sides. Her trademark shoes are orange high-heeled gladiator sandals. Nami wears some form of high heels in every arc, and while they do make her taller, they do not seem to affect the way she walks or her speed. Though she tends to style her hair neatly, occasionally, a hair on top of her head may form into a messy cowlick. She wears a strap around her thigh with three slots in it which she keeps each pole of her bo staff and later the Clima-Tact in.

Zoro usually maintains a very stern, serious, and distanced personality, but often loses his temper in a goofy and exaggerated comical style. It would seem however, that this anger is the only emotion that Zoro often feels comfortable showing. Outside of situations where he feels confident in battle, he tends to smile or laugh the least out of the Straw Hats and rarely fools around with the rest of the crew and likes to distance himself more to sleep or train. In fact, his defeat at the hands of Dracule Mihawk and subsequent vow to Monkey D. Luffy is the only time since his friend Shimotsuki Kuina passed that Zoro has been seen crying in the series. Even in moments that are particularly tough on the crew and would warrant sadness, Zoro chooses to maintain a quiet solemnity rather than outwardly express his emotions. He has been shown to believe to a degree that these emotions can hinder his judgement as a swordsman: when Ohm asked him if he was out for revenge upon discovering Tony Tony Chopper wounded and unconscious, he replied that he does not like to fight for reasons like that. Despite this assertion, though, he cares deeply for his crewmates and wishes to protect them at all costs, telling Ohm that in spite of his preference for fighting without a motivation he can feel one coming on. Although Zoro cares for his crew, he can also come off as a very blunt and cold person, especially when he is trying to get his point across. During the Davy Back Fight, when Chopper was forced to join Foxy's crew after losing an event, Chopper cried and complained, which prompted Zoro to yell at him and stating he was disgraceful. He reprimanded Chopper, reminding it was his choice to join the Straw Hats and compete in the fight and told him to man up and have faith in the crew to win him back. As with the ordeal when Usopp left the crew, Zoro refused to let him come back and even yelled at Nami to shut up when she tried to say otherwise.

Zoro is a tall, muscular young man with lightly tanned skin. He occupies his three swords along with him, bundled up with a green haramaki over his right hip, allowing him to easily draw them with his left hand. Of the three swords he has on his person, he has always been seen carrying the Wado Ichimonji, while his other two swords have varied over time due to them being destroyed and subsequently replaced with progressively better ones. Although his right hand is usually seen resting over them, he can also use this hand to pull his swords out before sitting down. He has three identical gold earrings on his left earlobe. Zoro normally keeps a black bandana tied around his left bicep and ties it around his head when he fights seriously against an opponent. Zoro's body is covered with scars from his many battles, most notably the massive scar stretching from his left shoulder to his right hip that he acquired during his loss against the world's greatest swordsman, Dracule Mihawk, at Baratie. His other visible scars are the scars he inflicted upon his ankles in a desperate attempt to free himself from Mr. 3's Tokudai Candle Service Set by trying to cut his feet off at Little Garden. After the timeskip, he gained another scar over his left eye, obtained through unknown means. Zoro's other remarkable feature is his cropped green hair, which Sanji often teases him about by calling him "marimo" (moss-ball, moss-head in the VIZ manga and Funimation adaptations) due to its similitude to one.

Luffy's personality can be described as childlike, in the sense that he tends to go to the extremes. He can either be extremely greedy, especially in cases of food, who his crew is, and adventure; or extraordinarily selfless, going so far as to virtually sacrifice himself to avenge or protect his friends, crew, and family. This childish mentality does not prevent him from often getting to the root of the problem and allowing him to figure out the simplest way of solving it.

Personality traits: Luffy is a Adventurous Spirit, Carefree and Optimism, Simple-Mindedness, Instincts and Ingenuity, Fearlessness, Leadership, Charisma, Loyalty and Selflessness, Respect, Compassion, Emotional, Righteousness, Respect for Food, Confidence, Running Gags, Gluttony, Mercy, Aggression, Humility, Stubbornness

Luffy is a young man of average height with shaggy black hair with a small widow's peak, round black eyes, and a slim muscular build. He is renowned for his trademark yellow straw hat with a red hatband (from which he gets his epithet "Straw Hat Luffy"), which was lent to him when he was young by the legendary pirate captain, "Red-Haired" Shanks, who in turn received it from Gol D. Roger. Before the timeskip, his main outfit consisted of a red vest with three gold buttons, light blue denim shorts cut off just above his knees, and tan sandals. Luffy also has a scar with two stitches underneath his left eye, which he earned as a child by stabbing his face to show Shanks that he was tough enough to be a pirate. He was severely wounded by Akainu in the Summit War of Marineford, leaving a large X-shaped scar on his chest.