Name : Yakushi Kabuto
Blood Type: AB
Village: Hidden Sound Village
Techniques: Dead Soul Skill (Shikon no Jutsu), Chakra Absorption (Chakra Kyuuin no Jutsu)
Kabuto was raised by a Jonin member of the Konoha Medical Unit Squad, who found him at the battle of Kikyo Pass when he was still a little boy. He was later recruited as 's right hand man, but the manga has hinted at an ulterior motive, casting some doubt on his purported loyalty.
His main role was to keep an eye on other talented ninja, specifically Uchiha Sasuke, in order to support the next phase in Orochimaru's plan. He resided for some time in Konohagakure with Akado Yoroi and Tsurugi Misumi in order to collect information. By intentionally failing the Chunin exam seven times (over a four year period) he masked his true skill and downplayed his presence in the village.
Although technically a Genin level ninja, Yakushi Kabuto is capable of matching even Hatake Kakashi in battle. During his fight with Tsunade, she commented that his sense of jutsu and sharpness exceeded even her own in her prime.
Supposedly, Kabuto is a spy, working for the Akatsuki member Sasori. Although it's currently unknown where Kabuto's true loyalty lies. Deidara mentions that one of Sasori's spies has become a traitor. In a recent chapter of the manga, however, it appears that Kabuto is that traitor. At this point, Kabuto also appears loyal to Orochimaru, who had freed him from Sasori's hypnosis. He serves as Orochimaru's top assistant, taking care of him in his weakened state. He also conducts experiments for Orochimaru, resulting in the extention in Kimimaro's life. His complex nature and tendancy to do good things (such as healing Hinata at the Ch¨±nin exam, though in disguise, and offer to heal Sakura after she was injured by Naruto as Four-tail Ky¨±bi, though he said Akatsuki is the main enemy to be dealt with) have made him possibly the most mysterious character in the series.
Recently, Kabuto seems to exhibit signs of jealousy (as evident from his comment " Hmph...Trying to belittle me...A-types are more suited to being underlings, that's what [Orochimaru] is trying to say..."). In the latest chapter of the manga, he was very forthcoming with information about Orochimaru's lair, and seemed almost sad when he informed Naruto that Sasuke was not the same as he used to be.
Kabuto first appeared in the chunnin exam as a leaf student who was extremely weak but extremely smart. Though it was soon short lived when he was shown as a hidden spy of the Sound village. Kabuto is not weak but extremely strong and is able to hold his own to Kakashi and some of the best ninjas.
Kabuto is Orochimarus right hand man and does only the most difficult missions for the sound because he is the only one Orochimaru can slightly trust. Kabuto rarely questions anything ordered by Orochimaru and follows up every command.
Kabuto was found by a medical team by the leaf at a young age and was not really good at any particular genre of fighting but as shown in the series he is extremely talented in tactics and medical jutsu. So much so that he was able to deal with Tsunade while his body movement was reverted.
Kabuto is a very strong ninja for the sound and is the second in command of the operations that happen in the Sound village. He takes care of all the arrangements for Orochimaru while his arms were unable to move. Kabuto is a extremely strong ninja but some have rumored that he is part of the Akatsukiˇ