Danzō Shimura

Danzo Shimura was a member of the Hidden Leaf's council and a major villain in the manga and anime series Naruto. Though his intentions were pure, Danzo's militant and archaic views on the role of ninja in the world made him a threat to the ideals that Konoha was built on. He actually turned some characters into major villains - Kabuto Yakushi. Nagato, Sasuke Uchiha.

Background
In his youth, Danzo was good friends with Hiruzen Sarutobi, having felt the need to upstart him. During the First Shinobi World War, Danzo and Hiruzen, along with the latter's team-mates Koharu Utatane and Homura Mitokado, were placed together in a squad under the Second Hokage Tobirama. When being late pursued by the Kinkaku Squad of the Village Hidden in the Clouds, Danzo attempted to volunteer in sacrificing himself as a decoy to ensure the others' safety. However, paralyzed with fear as Hiruzen volunteered for the task, Tobirama sacrificed himself instead while naming Hiruzen as his successor.

With Hiruzen as the Third Hokage, with him, Koharu, and Homura appointed roles as his advisors, a grudge filled Danzo resolved to become Hokage someday and formed the ANBU subsidiary named Root. Though the group was later officially disbanded, Root remained secretly active as Danzo executed shady dealing. One such event was aiding Hanzo in his attempt to wipe out the Akatsuki but the men he sent to the Village Hidden in Rain were all wiped out by Nagato. Danzo also played a role in Kabuto Yakushi becoming a rogue ninja under his former subordinate Orochimaru, whom Danzo had implanting the DNA of Hashirama Senju to use his Earth Style.

In the aftermath of Kurama's attack on Konoha, Danzo suspected the Uchiha clan to have involvement and supported their relocation for better observation. Years later, learning of the planned coup d’état by the Uchiha clan and playing on Itachi Uchiha's pacifist tendencies to provide him and the other elders with information of the clan's actions, Danzo secretly made an attempt on the life of Shisui Uchiha to obtain his Sharingan eyes. However, Danzo managed to obtain one as later secretly ordered Itachi to slaughter his clan in return that his younger brother Sasuke Uchiha would be spared death for their kin's treachery. Though Itachi committed the deed, he left Danzo with a warning to not harm Sasuke or he would expose his the circumtances of the Uchiha Clan's demise to the other ninja villages.

Part II
When Team Kakashi decide to meet with the spy Sasori installed in Orochimaru's camp, Danzo took advantage of Kakashi's absence to assign Sai to the group as part of a plan to secretly assassinate Sasuke. To achieve that goal, Danzo had Sai trick Orochimaru into thinking he wants to join forces with him to destroy Konoha. Though Sai failed his mission, Danzo allowed him to remain with Team Kakashi.

During the events of Pain invading Konoha, Danzo was against Tsunade calling Naruto back to the village in fear that they would lose Kurama. To that end, Danzo not only killed the messenger toad Kōsuke, but also ordered his subordinates not to come to the Hidden Leaf's aid with the expectation that Tsunade would be killed off with only a few other fatalities. However, despite Danzo's action, Naruto arrived none the less with everyone Nagato killed revived while Tsunade ended up in a coma. Following the invasion, the Hidden Leave are summoned before the Lord of Fire over what occurred, with Danzo convincing the feudal lord to name him the new acting Hokage.

Soon after, Danzo uses his power to mark Sasuke as a criminal to be killed on side before leaves for the Kage Summit in the Land of Iron to discuss dealing with the Akatsuki. Before leaving, seeing that he can not have confine Naruto due to new-found popularity, Danzo ordered the boy to be spied while sending his men to track down Kabuto for his medical knowledge. With Torune and Fuu as his bodyguards, Danzo arrives to the Kage Summit and attempts to name himself leader of the alliance that would fight the Akatsuki. However, the abrupt appearance of Taka and Zetsu forces Danzo to flee.

However, Danzo and his men were halted by Tobi at the Samurai Bridge. By that time his men were defeated by Tobi and Sasuke summoned to personally kill him, Danzo unsealed his arm and revealed it to have been embedded with multiple Sharingan eye as he admits his role in the Uchiha Clan Massacre. However, as a furious Sasuke attempts to crush him with his Susanoo, Danzo uses Izanagi to evade the fatal attack. With the powers of both Senju and Uchiha at his becon, Danzo clashes with Sasuke before before forced sever his right arm before he overwhelmed by the Senju DNA. Refusing to accept defeat, Danzo takes Karin as a hostage so he can use Shisui's eye on Sasuke. However, Danzo was shocked that Sasuke had his attack pierce through Karin to kill him. On the verge of death, seeing that he can never surpass Hiruzen, Danzo decided to use the last of his life to take both Sasuke and Tobi down with him with the Reverse Four Symbols Seal. Though both were able to get out of range, Danzo destroyed Shisui's Sharingan to prevent Tobi from obtaining it.

Abilities
Danzo was an immensely powerful and skilled ninja, who in life was considered one of the Hidden Leaf's best by his fellow elders and who was the rival of the Third Hokage himself since their youth. His power was such that he was able to effortlessly and single-handedly slay an entire platoon of would-be assassins near-instantly and fight on even terms with Sasuke Uchiha, despite his old age and Sasuke's excessive use of his Mangekyo Sharingan techniques, particularly Susanoo, while holding back most of the time to fight with Tobi immediately afterwards, all the while being unable use Shisui Uchiha's Mangekyo Sharingan contained in his right eye socket, in a fight that nearly ended as a stalemate and that would have if not for Karin's intervention at the vital moment.

Made elite his experience, Danzo's variety of fighting skills were, even when he died, very formidable. Danzo was highly skilled with Wind Style chakra nature, able to utilize various, very powerful techniques with instant ready ease, them being strong enough to equal the strength of Sasuke's Susanoo in any of its stages. He had access to the unique summoning contract for the Baku, a giant creature that dwarfed Sasuke's Susanoo, and that was capable of complimenting Danzo's Wind Style with its extreme suction ability to the point that Danzo was able to rip open Sasuke's armored Susanoo with one attack. Despite his old age, Danzo was very strong, fast, and agile, able to repel Karin with a single kick, catch Sasuke off-guard(placing a paralyzing curse mark as he did), and easily dodge Sasuke's Susanoo's attack with one high leap, despite noting its capabilities, also showing great reflexes. Along with paralysis curse marks, Danzo was skilled at using marks that could silence a member of Root if they tried to speak about him and set a creative booby trap with his Reverse Four Symbols Sealing Technique to activate at death. Doing this, he was able to catch both Tobi and Sasuke Uchiha off-guard, which visibly scared them.

Danzo's most fearsome and formidable abilities were the various bodily implants he did to himself or received from Orochimaru. Before the latter's death, Danzo took Shisui Uchiha's right eye, capable of using the Mangekyo Sharingan and the strongest genjutsu, and replaced his right eye with it, and took his right arm after his death and replaced his with it, and after the Uchiha clan massacre, Danzo took up to ten Sharingan eyes and implanted them into that arm. From Orochimaru, Danzo had the cells of the First Hokage implanted in his right arm as well. Doing this allowed him to use the forbidden dojutsu Izanagi through all his Sharingan, but only doing so with the ones in his arm. To conserve his chakra, as all his eyes were active, Danzo placed a seal on his right arm and bandaged his eye to conceal these implants. Using Izanagi allowed Danzo to control reality and illusion about himself, transfering any disadvatages, like fatal wounds, into a dream and making his own desire for successful attacks a reality. With the advantage the First's cells, Danzo could use Izanagi for one minute an eye, at the cost of losing its use afterwards to blindness. Using this to the full effect, Danzo was able to exhaust Sasuke and mortally wound him at the cost of the same. Danzo was very skilled at using Shisui's eye, able to easily locate a squad of assassins and use his Kotoamatsukami technique very effectively, able to control others with ease without direct sight of them. Along with the with the enhancements to his body and chakra reserves(which were very large) they gave, having the First's cells in him also allowed Danzo access to his Wood Style kekkei genkai, which he could use without hand signs, but only from his right arm, and its power was pale compared to the original. Aside from Sharingan, Danzo was very skilled at using and dispelling genjutsu, even Sasuke's inept Tsukuyomi.

Trivia

 * Danzo's death is very similar to that of Deidara, as both are engaged in a fight with Sasuke & then commits suicide, thinking they could kill him.
 * Danzo can be byfar considered as one of Naruto's most hated villain ever due to that he ruined the lives of some major villains & particularly the troubles he did to some of the series' protagonists.
 * Danzo is very similar to other delusional villains such as Judge Claude Frollo, Lord Cutler Beckett & Derek C. Simmons.
 * Danzo is fully NOT the Sixth Hokage & is just a candidate. Though some people still think he is, he is obviously not, as he was not chosen by Tsunade as a successor & was not vote by the villagers of Konoha.