This naruto papercraft is designed by jeje. Itachi Uchiha was an ANBU from Konohagakure's Uchiha clan before his defection, becoming an S-rank missing-nin and a prominent member of Akatsuki who was partnered with Kisame Hoshigaki.
Itachi was born into the Uchiha clan to Mikoto and Fugaku and was praised by all as the best of his generation; a genius above all others. Even by the standards of the battle-adept Uchiha clan, Itachi's prowess far outshone them. However, not even his family, friends, or teachers could understand him. When he was only four, Itachi had already witnessed countless lives lost due to the Third Shinobi World War, which emotionally traumatised him and turned him into a pacifist.
During the Nine-Tails' attack on Konoha, Itachi held his infant brother Sasuke and told him that he would protect him no matter what as well as wondering where his parents had gone.
In the anime it was shown that during their childhood, Itachi made a game of collecting paw prints of cats from a domestic ones to lions with his brother. The last paw print to be collected was Nekomata's who Itachi had defeated and requested him to fight Sasuke with all his might when he got older.
At age 7, he graduated from the Ninja Academy at the top of his class after only one year, mastered the Sharingan at age eight, passed the Chūnin Exams at age 10, and became an ANBU Captain at age 13.
He was praised highly by his father, who saw the family's future in Itachi and hence inadvertently neglected his younger son. However, during this time Itachi showed great affection towards his little brother and even encouraged his father to come to the Academy enrolment ceremony for Sasuke, something their father had otherwise forgotten, by saying that he would not go to an important mission that would establish Itachi a place in the ANBU ranks, otherwise.
When the Uchiha clan began planning to overthrow Konoha, Itachi, as an ANBU, was tasked with spying on the village. Knowing that a coup d'état would only lead to another Ninja War; Itachi began spying on the Uchiha instead, passing on information to the Third Hokage and the other Konoha elders. During this time he began to act strangely, not attending the clan meetings, speaking out against the clan and becoming the prime suspect for the murder of his best friend Shisui Uchiha, who was drowned in the Naka River. In reality, Shisui had entrusted his remaining Mangekyō Sharingan to Itachi, the other having been taken by Danzō. Itachi assisted Shisui in making it seem that his eyes were destroyed. Due to this the clan lost hope in Itachi, and his father began shifting his focus to Sasuke instead. Meanwhile, the Third's attempts to negotiate a bloodless end to hostilities between the two parties were proving ineffective so, against the Third's wishes, Danzō Shimura and the Konoha Council ordered Itachi to wipe out the Uchiha clan.
Before the fateful night arrived, Itachi discovered the existence of Tobi, who was attempting to rekindle the flames of war in Konoha. In return for not attacking Konoha, Itachi offered to help Tobi claim vengeance against the Uchiha for turning their backs on him decades earlier; Tobi agreed. Itachi slaughtered his entire clan overnight, sparing only Sasuke, because he could not follow through with the orders to kill him. Instead, he made himself out as a villain, who had killed their innocent family only to test his abilities. He told Sasuke that he was not even worth killing. In addition, Itachi told him, "You've always wanted to surpass me. That's why I'm going to let you live… if you wish to kill me, then hate me, despise me… and by all means flee, cling to your wretched life". Itachi also revealed to Sasuke where the secret meeting place of the Uchiha was hidden, and suggested that Sasuke go there to learn what the true history and purpose of the Sharingan was. He told him that in order to awaken the Mangekyō Sharingan, he had to kill the person he was closest to, and that when they met again, they should have the same eyes.
Sasuke managed to stand back up, awaken his Sharingan, and pursue Itachi. Upon reaching Itachi, he managed to knock off his forehead protector. Itachi shed a tear as he was picking up his forehead protector. He then proceeded to incapacitate Sasuke, who awoke in the hospital remembering only that which Itachi wanted him to. By doing all this, he wanted Sasuke to take vengeance on him and become a hero to Konoha, thus redeeming the Uchiha name. Hoping that his beloved little brother would someday be powerful enough to kill him, Itachi left the village as a traitor. According to Tobi, Itachi also had a lover, whom he killed during the Uchiha clan massacre. Knowing that Konoha would still want to eliminate Sasuke, Itachi pleaded with the Third Hokage to keep Sasuke safe. He also threatened Danzō to not harm Sasuke or risk Itachi revealing everything he knew about Konoha's secrets to enemy countries. Sasuke's safety was therefore secured and Itachi returned to his original plan of becoming infamous for his slaughter of the Uchiha clan.
Itachi joined Akatsuki in order to keep an eye on the organisation, along with Tobi, in case either ever acted against Konoha, all the while planning for his death at Sasuke's hands. While he was a member of Akatsuki, Itachi was approached by Orochimaru, who tried to steal his body to gain the Sharingan. Itachi trapped him in a genjutsu and severed his left hand as punishment, forcing Orochimaru to flee the organisation. He was partnered with Kisame Hoshigaki, who he initially greeted with threats after the latter tried to intimidate him. However, they eventually became good partners for sharing the common bond of having betrayed the people closest to them. Sometime after joining Akatsuki and forcing Orochimaru to flee, Itachi helped recruit Deidara by beating him in battle using only genjutsu, to which Deidara swore vengeance against Itachi.
At some point in time, Itachi contracted a fatal illness. He kept himself alive through the intake of various medicines and sheer "willpower", in the hopes of living long enough to die by Sasuke's hands.
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