Kimimaro

was a member of the Kaguya clan and the fifth member and leader of the then-named, and a loyal follower of Orochimaru. After he fell ill, the group was renamed the "Sound Four".

Background
Kimimaro was the only survivor of the Kaguya clan, a family of battle-loving barbarians. Being a rare owner of the Shikotsumyaku kekkei genkai, Kimimaro's father feared his son's abilities and had him locked up in a cage unless needed for battle. The Kaguya clan was wiped out when they attacked Kirigakure, seemingly for no reason other than desire to kill. Having underestimated their opponents' defenses, they were slaughtered, with Kimimaro the sole survivor. Wandering soon after, Kimimaro was eventually found by Orochimaru, and recruited as one of his most loyal ninja.

Under Orochimaru, Kimimaro found purpose in his life as he desired to ensure the continuation of his master's dreams and ambitions. Though Orochimaru took him under his wing to be one of his future hosts, Kimimaro did not mind such a fate if it meant being of aid to his master. Soon after, Kimimaro met Jūgo, a berserker whom Kimimaro felt a kindred spirit with. Kimimaro's friendship with Jūgo led to the events that resulted with him branded by the Cursed Seal that Orochimaru developed from his research on Jūgo, whom Kimimaro talked into being experimented on in hopes that it would help him. With his new-found powers, Kimimaro defeated all four members of the Sound Four singlehanded to be inducted into the renamed Sound Five. However, before his appearance in the story line, Kimimaro became afflicted by an unknown disease that destroyed what remaining worth he was to Orochimaru.

Personality
Unlike the rest of his clan, the battle loving Kaguya clan, Kimimaro didn't have a particular interest in fighting or killing. He merely saw it as a means to be of use to others. He was a calm and quiet individual who would dedicate himself to whatever mission was at hand. As a child, he was more gentle despite his natural talent for combat and unique abilities which made him the strongest of his clan, as seen from him not wanting to hurt others he had no involvement with, and his interest in flowers. His gentleness is also reinforced by how empathetic and kind he was to Jūgo.

After meeting Orochimaru, Kimimaro developed a strong devotion towards him, bordering on religious zeal or considering him a father figure (the manga suggesting the former, and the anime suggesting the latter), as Orochimaru was the only person to seemingly care for and inspire him. Kimimaro's relationship with Orochimaru was similar to Haku's relationship with Zabuza, both having similar backgrounds, and both found a purpose in living for their respective master; though unlike Zabuza and Haku, Orochimaru ultimately lost interest in Kimimaro when the latter was fatally ill and lost his purpose. His dedication to Orochimaru was so great, that, despite his body's failing strength, he was able to will himself into battle, and still proved himself as an extremely dangerous opponent for the likes of Naruto Uzumaki, Rock Lee and Gaara. Kimimaro believed that his purpose was to serve and protect Orochimaru, and that the only reason for him to exist was to serve the one who rescued him from a life of despair and loneliness. Gaara compared the eyes of Kimimaro to those of Sasuke Uchiha's, the eyes of those who only sought to prove their own existence, nothing more; even after death and reincarnation, Kimimaro retains his loyalty to Orochimaru. But he is shown to be patient, as seen during his battle with Lee, where he waited for him to take his medicine.

Gaara commented on Kimimaro to be hasty, as he suddenly attacks after he saved Rock Lee from his attack. Aside from that, he demonstrated extreme distaste for "trash" ninja, as he put it. He generally attempted to "clean them up", by killing the people who were the "trash" ninja, even if they were his allies (he plotted to kill Tayuya after she defeated Shikamaru, because she was unable to deliver Sasuke by sunset). Despite his verbal disrespect of his opponents, Kimimaro had been shown to have a sense of honour in battle, as demonstrated when he stopped the battle to allow Rock Lee to take his "medicine". He also had a habit of underestimating more powerful opponents, as he underestimated Gaara multiple times during their battle, though to be fair, Kimimaro himself did not suffer any true repercussions from his mistake.

The most notable trait that separated him from his four colleagues was that he rarely showed emotions, other than surprise, until Gaara insulted his faith in Orochimaru, causing him to become enraged before his death. It was also shown that Kimimaro was crying silently when he discovered he was no longer useful to Orochimaru.

Appearance
Kimimaro was characterised by his pale skin, vivid green eyes, masculine facial features, two dots on his forehead which all the members of his clan possessed, and shoulder-length white hair, which he wore divided down the middle on his head (distinguished by an atypical 'zigzag' hair parting) with two separate partings on either side of his face. As a child, Kimimaro's hair is longer, which is tied in a loose pony-tail near the middle of his back, though the initial style was very similar to his later one.

Under the wing of Orochimaru, Kimimaro wore a specialised version of the traditional Oto-nin ensemble, consisting of a light lavender, loose-fitting, long-sleeved, zip-up shirt, black pants cut off around mid-calf, bandages wrapped around his ankles, traditional shinobi sandals, and a purple, rope-like belt tied in an inverted bow around his waist. He also wore two red, tube-like hair ornaments; one on either side of his head, securing two locks of his silvery-white hair. He did not wear a Sound headband, despite his extreme loyalty to Orochimaru. His Cursed Seal of Earth is applied at the base of his throat, where it is a circular pattern of three curved lines.

Apparently, as a user of the Shikotsumyaku abilities, Kimimaro was given a different bodily structure from others, as Kabuto Yakushi claimed that there had been too little information on his body to give any medical treatment for his terminal illness.

Abilities
Kimimaro was referred to by Orochimaru as the most powerful member of the Kaguya clan, having "abilities that even his war-loving clan feared". Because of this, he was locked away in a cage for most of his life, only released occasionally when needed to fight other clans. His fighting abilities far outclassed all the members of the Sound Four combined, and his mastery of the Cursed Seal even impressed Jūgo, the source of the Cursed Seal. In fact, Kimimaro is the only person before Sasuke who could control Jūgo without exerting any efforts. Kimimaro also had a very strong determination, as when his failing body would be impossible to move physically, he forced it through sheer will, and still proved to be a deadly opponent. The fact that he could fight Naruto, Lee, and Gaara while dying of disease, and never actually being defeated by them, indicates he was an extremely powerful combatant at his peak. Indeed, even near death, his mere presence was enough to frighten the normally-arrogant Tayuya, as well as retaining a high level of stamina, which he showed in his battles with Naruto Uzumaki, Rock Lee, and Gaara, battling all three one after the other without collapsing.

Shikotsumyaku
Kimimaro's abilities came from his kekkei genkai, Shikotsumyaku, which allowed the user to manipulate their own skeletal structure as a means of combat. Specifically, it allowed Kimimaro to manipulate his osteoblast and osteoclast cells, which are responsible for building or breaking down bone tissue. This ability gave him absolute control over the concentration of calcium within his bones, allowing him to control the density or malleability of them. Kimimaro also stated that his bones were stronger than tempered steel. Kimimaro used this ability to wield his bones as weapons in battle, and could use them in the form of taijutsu attacks (which he called dances) to give him a variety of abilities, as well as grant him a near-invincible defence, able to withstand most of the impact from even a chakra-enhanced blade. He can also grow an entire forest of gigantic bone blades. Orochimaru has stated that this was the ultimate taijutsu ability, which is held in high regard, and the main reason why Orochimaru desired Kimimaro to be his next vessel.

Taijutsu
Kimimaro's abilities made him well suited for close-range combat fighting, demonstrating tremendous taijutsu skills combined with equally impressive speed, agility, and dexterity. He was able to defeat several hundred of Naruto's Nine-Tails-enhanced shadow clones effortlessly, at the same time not allowing himself to be struck. Kimimaro combined his Shikotsumyaku and taijutsu capabilities to form many deadly "dances". Rock Lee, a taijutsu virtuoso, has claimed that nothing was wasted in Kimimaro's movement, and that he (Kimimaro) was a taijutsu master. Kimimaro also possessed immense strength, enough to pull himself out of Gaara's chakra-infused sand, which is normally difficult, if not impossible, due to its sturdiness.

Cursed Seal
Like many others of Orochimaru's closest followers, Kimimaro was given a cursed seal, which granted him tremendous power. He bore the Cursed Seal of Earth, which is said to be equal in power to the Cursed Seal of Heaven, and both Seals are said to be the strongest amongst the ones used by Orochimaru. When in his Level 2 form, Kimimaro's appearance was similar to that of a dinosaur, with dark grey skin, six large bone spines protruding out of his back, and a long bone-spiked tail. Jūgo stated that Kimimaro had great enough skill with the Cursed Seal that he could do a partial transformation. Furthermore, Kimimaro's fighting style changed after entering his Level 2 state: he became much slower, but his strength increased to the point of smashing Gaara's sand with ramming, and his skin became thicker and harder, making it impossible for even Gaara's sand to penetrate it.

Chūnin Exam Arc
In the anime, Kimimaro was revealed to have participated in many of Orochimaru's schemes. He was seen to be responsible for killing the Kusagakure ninja that Orochimaru would impersonate. At this point, he gave a bloody cough, but decided to ignore it. However, while participating in the assassination of the Fourth Kazekage and his bodyguards so Orochimaru and the Sound Four pose as their victims, Kimimaro's disease fully manifests with him sent back to Otogakure to be placed by Kabuto in intense medical care to keep him alive for as long as possible. Hearing that his failing health has made of no use to Orochimaru, Kimimaro began silently crying for losing his purpose.

Sasuke Retrieval Arc
When the Sound Four took too long in bringing Sasuke to Otogakure, Kabuto decided to wake Kimimaro to maniputlate him into aiding them even if meant he would die. Regardless as he forced himself out of bed, Kimimaro resolved that bringing his replacement, Sasuke Uchiha, is the only purpose he can do for Orochimaru. Prior to leaving, Kimimaro went to see Jūgo one more time. Despite Jūgo's protest for his health, Kimimaro assured him that Sasuke is his legacy while thanking Jūgo for their friendship.

Arriving to find Tayuya and the casket holding Sasuke was in, Kimimaro threatened to kill her unless she kill some of the Konoha ninja, saying he only let her live because she had a duty to complete. He then left with the barrel, overpowering Naruto Uzumaki as Sasuke emerges from the coffin with Kimimaro covering his escape towards Otohakure. During the fight, revealing Orcohimaru's intentions for Sasuke, Kimimaro was able to kill Naruto when Rock Lee arrived and kicked him. Kimimaro saw Lee as a stronger opponent than Naruto.

When Kimimaro chased after Naruto when he started to go after Sasuke, Lee caught his bone, allowing Naruto to leave. Kimimaro proved to be more than a match for Lee at first, but after Lee started using the Drunken Fist he gained the upper hand, Kimimaro being unable to react to his unusual movements even after he had figured out what Lee was using. After Lee managed to land an attack on him, Kimimaro admitted he couldn't read his movements. He then activated the first stage of his cursed seal to overpower Lee. He then used his bones to cut Lee's face and knock him down.

When Lee started to sober up, Kimimaro gained the upper hand again and struck Lee down. Believing he had killed Lee, he started to go after Naruto, but Lee stood up again in time. He caught Lee's kick with his bones and almost killed him. Gaara arrived at that moment, saved Lee, and began fighting Kimimaro instead. Kimimaro then retracted his bones as he acknowledged Gaara as a stronger opponent, his sand being a strong defence. He guessed Gaara wasn't a close combat fighter, recognising the difficulty of bringing Gaara to close range. When Gaara started to attack him, Kimimaro tried to use his Ten-Finger Drilling Bullets while dodging Gaara's attacks. Noting that all of Gaara's techniques involved sand, he pointed out it was foolish for Gaara to fight somewhere where there wasn't sand. Gaara brought Kimimaro's attention above to distract him while he caught hold of Kimimaro by his feet, and proceeded to explain that as long as he had his sand, he could use it to make more.

Kimimaro was then trapped and crushed by Gaara's sand, but survived by creating a layer of bone under his skin. He then activated the first stage of the Cursed Seal of Earth and broke out. Kimimaro admitted that he had underestimated Gaara, but will not make the same mistake again. After surviving being buried by Gaara's tsunami of sand, Kimimaro. He tried to land a hit on Gaara, but his Armour of Sand blocked it. He then used his two-part dance to restrain and kill Gaara, but it couldn't break his ultimate defence.

After Gaara insulted Kimimaro's loyalty to Orochimaru, Kimimaro begins to lose his focus before being buried two hundred metres below the ground, where the pressure can crush even steel. Kimimaro, however, used the last one of his dances to turn the battlefield into a forest of bones, that Gaara and Lee barely escaped by hanging onto a small cloud of sand, with the former's chakra reserves depleted. Fueled by his hatred of hearing Orochimaru insulted, Kimimaro emerged from one of the bones and prepared to rip the two to shreds. However, he finally succumbed to his illness just before he could kill Gaara and died where he stood. Gaara later came to the conclusion that none can defeat loneliness, even if it means to care for a person like Orochimaru.

Shinobi World War Arc
In preparation for the Fourth Shinobi World War, Kimimaro is reincarnated by Kabuto Yakushi to fight against the Allied Shinobi Forces. After being mobilised, he becomes part of the group that Chūkichi requests assistance from, alongside Chiyo and Hanzō. He later encounters the remnants of the Surprise Attack Division with this improvised team, where Deidara is imprisoned. Pursuing the retreating opposition retreats, Kimimaro contemplated how Orochimaru's chakra, via Kabuto, now flows within him while having resolve to complete his assigned goals.

When enemy reinforcements arrive from the Fifth Division to provide assistance, Kimimaro attacks them with his Shikotsumyaku, which manages to pierce even the samurai's chakra-infused blades. Fatally impaling several of these samurai by the following day, Kimimaro observes the arrival of Naruto's shadow clone, who notes that the outcome of this battle will be different than their last. Remarking that his appearance demonstrates that time had passed, he is then seemingly struck by Naruto's Wind Release: Rasenshuriken.

When the Impure World Reincarnation was released, a shocked Kimimaro — who was still battling the Alliance's members — was enveloped in a light of sorts before beginning to deconstruct. Later his soul is seen ascending from his vessel with the release of the Impure World Reincarnation and retuned to the afterlife.

Legacy
Kimimaro's words to him that Sasuke, who bore a curse seal like himself, is his living legacy inspired Jūgo to follow Sasuke by joining his group.

Through Kabuto reincarnated Kimimaro for the Fourth Shinobi War, he also assimilated Kimimaro's DNA along with the rest of the Sound Five. By using Sakon and Ukon's kekkei genkai, Kabuto can manifest a construct of Kimimaro with access to his Shikotsumyaku kekkei genkai.

Trivia

 * Though some fans believe that his full name was Kimimaro Kaguya, the second databook only said his name as Kimimaro.
 * Most of Kimimaro's actions in the series, prior to his appearance in the Sasuke Retrieval Arc, are exclusive to the anime.
 * is an ancient Japanese title of nobility. is Japanese slang for a person with thin or shaved eyebrows; this stems from a practice used by noblemen in ancient Japan where they shaved their eyebrows and painted two dots similar to Kimimaro.
 * Kimimaro appeared in the omake at the end of Naruto Shippūden episode 129, like many of the other minor characters.
 * According to the Naruto Official Databook:
 * His favourite word is.
 * Kimimaro has completed 22 official missions in total: 0 D-rank, 0 C-rank, 15 B-rank, 5 A-rank, 2 S-rank.

Quotes

 * (To Kabuto) "''I've realised recently… that everyone is given life for a reason. Everyone has something important to accomplish. The quest to discover what that is… …is the only freedom us humans have been given.
 * (To Kabuto) "I must agree… I no longer have the capacity for metempsychosis… In fact it's quite difficult to discover my purpose now that I've lost everything. However, I finally understand… Although he may not be me. I will bring in the new "container" here… Even if it costs me my very life. This is how I show my thanks to Orochimaru-sama and my way of repaying my uselessness."
 * (To Tayuya, about Sasuke) "This is an important "vessel" for that dream… but… you all were too late…"
 * (To Tayuya) "''The reason I've yet to kill you is… you still have a mission to accomplish by staying alive. Please take put those… two trashes over there.
 * (To Gaara) "''Because of my body's illness, I won't last long… But… That destruction will not happen for I am not alone. While I am fulfilling Orochimaru's aspirations… I will stay in Orochimaru's heart forever.
 * (Last words) "It's not brainwashing. It's all my own reasoning. What the hell would you know?!!"