Kimimaro

is the fifth member of the Sound Four, thus temporarily changing their group name to the Sound Five. The original four were forced to accept him against their will, as Kimimaro's combat abilities far exceeded all of their skills combined.

Background
Kimimaro was the sole survivor of the Kaguya clan, who were battle loving barbarians. The Kaguya clan was wiped out when they attacked the Hidden Mist Village (seemingly for no reason other than the desire to kill). Having underestimated their opponent's defenses, they were slaughtered to the last man, with only Kimimaro surviving.

Kimimaro was referred to by Orochimaru as the most powerful member of the clan, having "abilities that even that 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. Afterward he was found by Orochimaru and recruited as one of his most loyal servants.

While belonging to a clan that loves killing, murder, and slaughter, and being the most powerful of this clan, Kimimaro was not truly violent because he never really knew the outside world. Thus, the only reason he fought was because his clan needed him to do so, and being needed by someone was the one thing he truly desired (until he meets Orochimaru, where his desires change to serving him and ensuring the continuation of his master's dreams and ambitions. Kimimaro was also originally to be one of Orochimaru's body, since Kimimaro died he was no use to Orochimaru).

Personality
He had a strong devotion towards Orochimaru, bordering on religious zealotry or considering him a father figure, as Orochimaru was the only person to care for and inspire him. On his way to the Hidden Mist, he encountered Zabuza Momochi and Haku, apparently shortly after they met each other, since Haku is still young. Interestingly, the relationships between Orochimaru and Kimimaro is parallel to that of Zabuza and Haku and to that of Raiga Kurosuki and Ranmaru in many ways, as all of them had similar backgrounds and found a purpose in living for another.

Kimimaro demonstrates extreme distaste for "trash" ninja, as he puts it. He generally attempts to "clean it up", by killing the person who is "trash", even if they are an ally (he plotted to kill Tayuya after she defeated Shikamaru because she was unable to deliver Sasuke by sunset). The most notable trait that separates him from his four colleagues is rarely showed emotions other than surprise until Gaara insulted his faith in Orochimaru; causing to become enraged literally prior his death.

Chunin Exams
During his fight with Rock Lee, it is revealed in a flashback that Kimimaro participated in many of Orochimaru's schemes, amongst other killing the three Grass Shinobi, that Orochimaru would later impersonate during the second part of the exam, and later he was also shown at the site of the death of the Fourth Kazekage, where he finally succumbed to his fatal illness, that in turn would have Kabuto placing him in an intense medical care, to keep him alive for as long as possible.

Sasuke Retrieval
Kimimaro died when he attempted to bring Sasuke to Orochimaru as a way to end his life and thank Orochimaru for his doing. He succeeded in taking the barrel Sasuke was in, but Naruto Uzumaki caught up with him to take Sasuke back. Kimimaro easily held off Naruto until Sasuke could get away on his own. Rock Lee (after recently having surgery), saved Naruto. He easily defeated Rock Lee, even after Rock Lee (accidently) attempted the Drunken Fist style of taijutsu (which is the ability for ninja to power up by drinking alcohol), but Gaara came and saved him, who appeared as a result of renewed relations between Sunagakure and Konohagakure. Though Gaara's spectacular sand attacks managed to hold off Kimimaro a bit, Kimimaro's second state of the Cursed Seal crushed all resistance. After Gaara's ultimate attack, which turned the whole battlefield into sand, Kimimaro used the last one of his dances to turn the battlefield into a forest of bones. However, he succumbed to his illness just before he could kill Gaara, who were already out of chakra. Gaara came to the conclusion after the fight that no one can defeat loneliness, even if it means to care for an evil person like Orochimaru. Gaara comments that Kimimaro had the same eyes as Sasuke, which say (so to speak) "I want to confirm the value of my existence."

It is later revealed that he was with Orochimaru when he managed to trick some of the Fūma clan into joining with him sometime prior to his invasion upon Konoha.

Part II
Kimimaro was mentioned by Jugo of Team Snake when he was fighting Sasuke, as Jugo claimed Sasuke and Kimimaro were the strongest people he ever battled. Kimimaro was also capable of controlling Jugo's berserk rages without having to battle him, which made Jugo care for Kimimaro as a friend (and the reverse was true as well, since Kimimaro thanked Jugo since it was mainly his abilities that made Kimimaro's so great). Jugo's reasons for joining Team Snake include the fact that, after hearing that Kimimaro had died to ensure Sasuke reaching Orochimaru, he believed that Kimimaro's spirit continued to live on in Sasuke, despite how one major difference between Sasuke and Kimimaro was that Sasuke had no care for Orochimaru, and only went to him for more power.

Abilities
Kimimaro's abilities were incredible, as he was said to be as powerful as Orochimaru himself. His abilitites made him well suited for close combat fighting, though he could use long-distance combat as well. His abilities come from his Bloodline Limit Shikotsumyaku, which allows the user to manipulate their own skeletal structure as a means of combat. Specifically, it allowed Kimimaro to combine his chakra with calcium, making his bones flexible as well as strong. Kimimaro used this ability to wield his bones as weapons, and could put them in the forms of taijutsu attacks (which he called dances) to give him a variety of abilities. Like many others of Orochimaru's closest followers, Kimimaro was given a Cursed Seal, which gives him greater power. He bears the Cursed Seal of Earth, which is said to be equal in power to the Heaven Seal branded on Sasuke and Anko. When in his Level 2 form, his appearance is similar to that of a dinosaur, with dark gray skin, six large bone spines protruding out of his back, and a long bone spiked tail. He also appears to have much greater control over his seal than any other character seen so far (with perhaps the exception of Sasuke who was able to actually perform partial transformations), since he was able to restrict its spread to his chest in order to grant him a greater surge of power without activating it fully. Despite his incredible power, Kimimaro eventually became far less useful to Orochimaru after an unknown disease left him bedridden.

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