Name :Roronoa Zoro
Nickname:"Pirate Hunter Zoro
zoro is an average sized, muscular young man. He almost always carries around his three swords, bundled up with a green haramaki over his right hip, allowing him to easily draw them with his left hand. His right hand is usually seen resting over them, though 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 bandanna tied around his left arm. He ties the bandanna around his head when he is fighting seriously against an opponent.
Zoro's shirt varies from time to time, but he consistently wears black trousers tucked inside black boots. Zoro is most commonly seen wearing a plain white shirt with three buttons at the collar, but after this shirt is effectively torn to shreds due to the incident at Thriller Bark, he wears a different shirt with each arc.
His body is covered with scars from his many battles, most notably the one acquired during the Baratie Arc, when he lost a duel with the world's greatest swordsman, Dracule Mihawk. As a result, Zoro was left with a massive scar stretching from his left shoulder to his right hip. In the Little Garden Arc, he tried to free himself from a wax prison by cutting off his feet. Although he did not entirely succeed, he gave himself a scar around each ankle. These scars are marked by black stitches.
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 dub).
After the two year timeskip, Zoro has a new scar running down his left eye, which is now implied to be blind as it is almost always closed. His neck appears much thicker and more muscular and his hair became slightly longer. Zoro now wears a long, open dark-green coat, closed on his waist by a red sash, in which his swords are now tucked, and his black bandana tied around the left sleeve. He has no shirt underneath, and his green haramaki is visible under the coat. He also appears to have gotten taller, as he was several inches taller than Nami when standing near her.
According to Oda, Zoro resembles a shark. Oda uses the color green to represent Zoro, he smells of steel, and the flower that suits him best is the thistle.
History :As a child, Zoro trained at a dojo in Shimotsuki village. Zoro states in the Baratie, that, "Once he decided that he would become an invincible Swordsman, he left his life behind". 
Zoro and Kuina making their promise.
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Even as a child, Zoro was strong enough to defeat most adults, but could not defeat Kuina, the Dojo master's daughter. After their 2000th fight (and Kuina's 2000th victory) Zoro challenged her in private for one more match - with real swords. Although he had improved tremendously since their first match, he still lost and cried with frustration, telling Kuina his dream of being the world's greatest swordsman. Hearing this, Kuina confided in Zoro, telling him that she shared the same dream but knew she could never attain it - her father had told her that girls could never be true sword masters, and that her fighting potential would decrease as her body matured. Zoro, annoyed by her defeatist attitude in spite of repeatedly winning against him, told her that one day he would beat her because he was more skilled, not just because she was a girl. The two make a promise - that either of them must become the world's best swordsman.
Young Zoro training vigorously.
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The next day, Kuina suffered a fatal fall down the stairs of her dojo (to get a sharpening stone for her sword, something she wouldn't have needed if she and Zoro hadn't fought with real swords), much to Zoro's anger and disappointment. Realizing that she would never have a chance to fulfill her dream, Zoro took it upon himself, asking his sensei, Koshiro, for her sword, Wado Ichimonji, and began working to develop his signature Santoryu, holding his own two swords in each hand, and Kuina's clenched between his teeth. 
The World's BestEdit The World's Best sectionEdit
Eventually, Zoro learned of Dracule "Hawk-Eye" Mihawk, who currently holds the title of the Greatest Swordsman in the world. He set off to sea, searching for him in order to challenge him to a duel. However, he lost his way, and could not find his way back home. In order to survive on his own, he took on bounties to pay for living expenses. He quickly built a reputation for himself as a "Pirate Hunter", after which he met the two bounty hunters, Johnny and Yosaku.
Because of his reputation as a bounty hunter, Zoro was offered a position as a numbered agent within Baroque Works. He accepted, but only on the condition that he would lead the organization (which they refused). He then killed Mr. 7, the agent who offered him the position, to defend himself.
Personality :Zoro usually maintains a stern, serious and distanced personality, but often loses his temper in a goofy and exaggerated comical style. He can also be extremely intimidating, easily frightening weaker opponents with just his glare. It has also been stated that he has a monstrous killing intent evident from the fact where he almost drew his sword on one of the Tenryubito. Zoro is also very apathetic, rarely showing emotion and usually expressing coldheartedness and indifference. Despite this, Zoro has a kind heart, shown as he was willing to risk death for the sake of a little girl he did not know shortly after his introduction.
He has a strong sense of leadership and reasoning. While technically not a samurai, Zoro maintains Bushido to a certain degree (i.e. he consistently refuses to attack an adversary whose back is turned, the only exception being when his friends are in imminent danger of losing their lives in which Zoro would strike the attacker from behind, and Zoro himself considers a scar on the back to be a swordsman's greatest shame). Whether he agrees with them or not, he will stand by Luffy's decisions, stepping in only to point out the seriousness of a situation where it has been overlooked by his crewmates (most notable when they wanted to bring Usopp back into the crew after Usopp challenged Luffy to a duel over the Going Merry and lost).
A running gag throughout the series is that while he is very perceptive during battle (as well as out), his sense of direction is extremely poor, to the point of getting lost on a straight path. This is often the result of Zoro not understanding directions. In the Alabasta Arc, he mistakes going north for going up. In the Drum Island Arc, he believes that he can keep the ship on course by heading toward a large cloud (which can move and change shape). He is unaware of his lack of direction. Every time he gets lost, he mutters "the others are lost again". However, after the timeskip, Zoro is the first Straw Hat to arrive back at Sabaody days before the others, shocking Sanji, though it was Perona who helped Zoro reached Sabaody early. He seems to make up for this, though, by confusing a gigantic pirate galleon for a fisherman's small boat when it's pointed out to him.
Another running gag of the series is Zoro's ability to effortlessly deliver perfectly timed lines in passing or even during battle that are deemed "cool" by other characters, leading him to be borderline worshiped and idolized especially by crewmates Usopp, Chopper and Brook. Another running gag is how Zoro keeps untying bandages when he isn't fully healed, claiming that they make it hard to move, only to be scolded by Chopper, who tells him that they are there so that he doesn't move.
Zoro is very proud of the reputation he has built for himself both as a swordsman and as "The Pirate Hunter", starting with his Bsymbol.gif60,000,000 bounty which has almost tripled since then. He also enjoys the fact that he has a higher bounty than Sanji. During the assault on Enies Lobby, one of the Marines referred to Zoro as "Luffy's underling" much to the delight of Sanji, who quickly became infuriated when Zoro pointed out that Sanji's lack of notoriety puts him below Zoro in status. Since then, once in a while to anger Sanji, Zoro will refer to him as "Pirate A". More recently he has been calling Sanji '#7', refering to his placing in arriving at Sabaody. However, in spite of his personal pride and self-respect, Zoro has shown to be willing to lower himself to the ground in complete humility for the sake of his friends, as was seen when he begged Kuma to spare Luffy's life in exchange of his own (Zoro's). And then again when he shamelessly bowed before Mihawk, begging the Shichibukai who is his enemy, to train him in the ways of the sword.
While the crew sails from one island to another, he normally spends time on lifting weights or naps (sometimes both at the same time), only to be regularly awakened in a rather violent way by Nami, Sanji or (accidentally) Luffy. He also likes to drink alcohol (sake), almost to the degree that Luffy likes meat, and, like Nami, has an inhumanly-high tolerance for alcohol. He is also regularly reverts to drastic measures to solve simple problems, suggesting solutions that others would normally consider to be their last possible, worst-case-scenario choices. When he and Usopp were accidentally handcuffed together, Zoro's first suggested solution was to cut off one of their hands. He also is one of the first Straw Hat members to suggest killing someone or threatening to kill someone.
Zoro can also be very vigorous when he is determined to achieve a goal or defeat an enemy. The risks that he will often take to pursue his dream of becoming the world's greatest swordsman often leave others wondering if he is crazy. As far as Zoro is concerned though, only he has the right to call himself "crazy."  However, he is able to accept defeat when he perceives it to be inevitable. As pointed out in the Skypeia Arc, Zoro is indifferent to religion. He does not believe in any god but holds nothing against those who do. When Zoro has the intention to fight seriously, he ties his black bandanna (normally kept knotted around his left arm) around his head. Zoro lives for the thrill of combat; Scratchmen Apoo commented on his "insane killing intent", acknowledging that Zoro was a "real beast". He also has a habit of smiling joyfully whenever he faces a particularly skilled opponent, which often unnerves both friend and foe alike.
Weapon Name:Shūsui,Wado Ichimonji and Shūsui
are the three swords in the picture.
Strengths :Zoro has also been shown to have the highest endurance out of all the Straw Hats. Zoro has survived from numerous injuries and wounds that would easily kill normal people, showcasing his unbelievable super-human endurance. Even while in an almost death-like state, he is still able to battle against very strong enemies. During almost all of his major battles, Zoro is usually seen covered with blood at the end. When not armed with his swords Zoro has shown to be skilled in Hand to Hand Combat. He has been known to effectively knock out much larger creatures with unarmed strikes. Also he has been able to defeat opponents with massive punches and kicks. Zoro has also been shown to fight on par with Sanji even without his swords.Even without his swords, Zoro has monstrous strength. At a very young age he was able to lift boulders over his head, and is now able to lift and toss an entire building. He can use some sword techniques without his swords. He has also been shown to pack powerful punches, and was even strong enough to deflect a punch from Oars. He even developed the ability to pump his arms up with pure muscle.
However, Zoro seems unable to control his strength prior to the time-skip. This is shown when he tries to hold back while fighting the shipwrights of Galley-La using the dull edge of his swords, and yet still causes serious damage.
weakness::Zoro also has another obvious weakness: his complete lack of orientation. He often demonstrates that he can easily get lost everywhere and always walks in the wrong direction. He even walks the wrong way when being directly shown which way to go. In Enies Lobby, Nami pointed forwards and told everyone to go this way but Zoro still walked in the wrong direction. These traits often worry the other Straw Hats and make them look out for Zoro and sometimes mock him for it