Kimimaro is the sole survivor of the Kaguya clan. As the strongest member of the clan, Kimimaro was kept locked up at all times, only being released when needed for a battle. After his clan was killed, Kimimaro was found by Orochimaru. Kimimaro proceeded to develop a strong devotion towards Orochimaru, viewing him as the only person who cared for him. In his devotion to Orochimaru, Kimimaro stops at nothing to ensure the continuation of his master's dreams and ambitions. To this effect, he willingly kills any who oppose or hinder Orochimaru's progress, and even offers himself as a future host for Orochimaru's soul.
The Kaguya clan's kekkei genkai, Shikotsumyaku , gives Kimimaro the ability to manipulate his skeletal structure. An example of this ability is seen when Kimimaro fires his finger bones from his hands like bullets. Any injuries the skin receives during the process are instantly healed and replacement bones are created to restore the use of his hands. This ability can be used to sprout bones from any point on his body, giving him a quick defense against physical attacks by covering himself in spikes. Kimimaro can increase the strength of these bones to steel-like quality, a trait he often takes advantage of when using his bones as a sword. Each different purpose he has found for his bones he refers to as a specific dance, all of which are named after a plant.
Gamabunta ( Literally meaning "Toad King") is the boss of the toads that are summoned. He is huge (about 100 meters high) and is summoned for battles with the biggest of enemies. His sons are Gamakichi and Gamatatsu. Naruto can only summon him with his demon fox chakra. Without it, Naruto can only call upon some of Gamabunta's smallest children. Gamabunta is first seen in the premiere of the series, where he and the Fourth Hokage face off against the demon fox. He is not given a speaking role until he is first summoned by Naruto in the month long training session with Jiraiya. Jiraiya pushed him over a cliff in order to induce life-threatening fear in Naruto so that the demon fox chakra could come out, but never expected Naruto to summon Gamabunta. Given that Gamabunta wasn't happy about appearing at the bottom of a canyon, Jiraiya quickly fled.
Gamabunta is a grumpy and highly apathetic character. He doesn't like to take orders from anyone, unless the summoner is highly talented and earns his respect. Jiraiya, Naruto, and the Fourth Hokage are three of the few people that he has allowed to ride on top of his head without question (although Jiraiya admits that he can't completely control Gamabunta, and Naruto had to struggle for Gamabunta to accept him). He uses some Japanese words that only a yakuza gangster would use, but he is portrayed as an ultimately powerful and positive force. He is fiercely protective of his kin and he hates to be underestimated by anyone, both of which take precedence over his normal apathy. Often, it is one or a combination of these two factors that entices him to fight. Overall, despite his grumpy exterior, he shows respect towards Naruto as if he were a son. He even explained to Jiraiya that he's aware of Naruto's talents and potential. He and Jiraiya seem to be good friends and, as implied in the series, drinking buddies, despite Jiraiya's admitted lack of control over Gamabunta. However, he will scold him on occasion.
Named after the Shinto moon god, Tsukuyomi, this jutsu is one of the most powerful genjutsu in existence. It is unique to the Uchiha clan and only those with the Mangekyo Sharingan can perform it. When executed, the jutsu traps the target in an illusionary world that is completely controlled by the user. While it only takes a few seconds to complete in the real world, the user can make it seem as if days have passed for the target. Depending on the user's whim, they can either torture their target for days on end, or make them relive a traumatic event over and over. Once the jutsu is finished, the target will not be able to fight for some time, if they don't suffer complete mental collapse. An example of this is Kakashi Hatake, who had to be hospitalied for some time after Itachi preformed the Tsukuyomi on him.
While the illusion is never the same twice, some elements always remain. The first and foremost similarity is the red moon, which hangs in the sky of each illusion. The moon, in turn, casts a red light throughout the illusion, giving the background a blood-red appearance while the figures within the illusion are solid black with white outlines.
Because the Sharingan is the main factor in executing this jutsu, eye contact is usually required, but Itachi was able to use it on Naruto when Naruto only looked at Itachi's finger. When he used it on Sasuke Uchiha, however, Itachi seemed to force Sasuke to open his eyes. Sasuke had both eyes closed prior to Itachi's activation of the technique, but opened them in shock as Itachi used the technique. Alternatively, Itachi may have simply caused Sasuke enough pain to open his eyes, or Sasuke did so by himself, despite how unwise such an action was.
Such a powerful technique is not without its disadvantages, though. Because of the complexity of the illusion and the quickness with which it is executed, an enormous amount of chakra is necessary to perform it. source: http://naruto.wikia.com/wiki/Tsukuyomi
