Itachi Uchiha

was Sasuke Uchiha's older brother, an S-class missing-nin from Konohagakure and a prominent member of Akatsuki who was partnered with Kisame Hoshigaki.

Background
Itachi was born into the Uchiha clan 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 4, Itachi had already witnessed countless lives lost due to the Third Great Shinobi World War, which emotionally traumatized him and turned him into a pacifist. At age 7, he graduated from the Ninja Academy at the top of his class after only one year, mastered the Sharingan at age 8, 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, hence neglecting his youngest son, Sasuke. However, during this time Itachi showed great affection towards his little brother and even encouraged his father to come to the Academy enrollment 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 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. 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.

Before the fateful night arrived, Itachi discovered the existence of Madara Uchiha, who was attempting to rekindle the flames of war in Konoha. In return for not attacking Konoha, Itachi offered to help Madara claim vengeance against the Uchiha for turning their backs on him decades earlier; Madara agreed. Itachi slaughtered his entire clan overnight, sparing only Sasuke as Sasuke's life was worth more than the village to Itachi, and he could not follow through with the orders to kill him as well. Instead, he made himself out as a villain, who had killed their innocent family only to test his abilities. By doing so, he wanted Sasuke to take vengeance on him and become a hero to Konoha, thus redeeming the Uchiha name. He tortured Sasuke with his Mangekyō Sharingan and encouraged him to become strong enough to kill him and avenge their family. Hoping that his beloved little brother would someday be powerful enough to kill him, Itachi left the village as a traitor. According to Madara Uchiha, 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 him 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 organization, along with Madara Uchiha, in case either ever acted against Konoha, all the while planning for his death at Sasuke's hands. While 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 organization. Sometime after joining Akatsuki and forcing Orochimaru to flee, Itachi helped recruit Deidara, by beating him in battle, to which Deidara swore vengeance against Itachi.

At some time, Itachi contracted a fatal illness, to which he kept himself alive through the intake of various medicines, in the hopes of living long enough to die by Sasuke's hands.

Personality
Ever since his first appearance, Itachi had always been mysterious, and had acted as though he was hiding his true self. While flashbacks to his past showed that he was a compassionate brother and person, his later acts and claims made it seem that this was mostly just an act. But, surprisingly, he genuinely was the compassionate brother he had once claimed to be, although he hid this from the rest of the Akatsuki to protect Sasuke.

As a member of Akatsuki, he possessed incredible self-control of his emotions. He constantly displayed an emotionless personality. He only showed surprise when opponents proved more powerful or skilled than he had expected, and even then he didn't lose his composure. He did not possess any arrogance, and fully justified any statements he made about his power, even complimenting his opponents at times on their abilities.

In addition to being an extremely powerful ninja, Itachi had equally impressive intelligence, and was shown to be very wise. He was exceedingly sharp and observant to any situation at hand, as he was rarely surprised or caught off guard. He also displayed great intuition, as he was almost never deceived and even then almost instantly realized the truth. Despite his status as a wanted criminal, and having wiped out his clan, Itachi took no enjoyment in violence or combat, instead preferring to avoid battle or, if this was not possible, end it as quickly as he could.

Itachi's only initial interest was in Akatsuki's goals, and his only loyalties appeared to be to the organization and its members, seeming to put the organization's success and secrecy before everything else. As such, Itachi got along with his partner, Kisame, much better than most other Akatsuki members did with their own partners. Kisame appeared to have a deep loyalty to Itachi, immediately doing as he instructed and constantly looking out for his well-being. Itachi treated all of his fellow Akatsuki members to this same, more respectful personality, although his courtesy was rarely returned by the other members.

However, when he was in a genjutsu duel during his fight with Sasuke, he cruelly claimed he had only let Sasuke live so that he could take Sasuke's eyes and obtain his own Eternal Mangekyō Sharingan, after which he then claimed the Uchiha clan had been nothing but tainted and evil, since many members would kill their friends to gain the Mangekyō Sharingan, and would take another Uchiha's eyes to make its power permanent. Once the genjutsu was released, he called it his true self, implying his calm, emotionless personality was also a facade. This persona was later revealed to be only an act to ensure that he would die by Sasuke's hands, his love for his younger brother being the fundamental aspect of his personality.

In the end, Itachi put all of his faith in Naruto, who he notes as the person most determined to save and protect Sasuke. After hearing Naruto's answer to keep protecting Sasuke and everyone in Konoha, Itachi gave him some of his power. He was very grateful towards Naruto's determination to save Sasuke, and was smiling after hearing Naruto's response. Itachi even trusted him enough to bring Sasuke back to the light.

Appearance
Despite his status as an infamous shinobi, his appearance was not the most intimidating, apart from the intensity of his eyes. While living in Konoha, he would regularly have a gentle and caring look in his eyes, especially directed towards his younger brother. After joining Akatsuki, he would regularly have a stern look to them.

He, like all members of his clan, possessed dark gray eyes and black hair that hung near his cheeks to frame his face, however he also had a long low ponytail in the back of his hair; later obscured by his Akatsuki cloak after joining the organization. This ponytail is seen to grow throughout the series, when he was around 8 or so, he had short hair, when he was about thirteen when he killed the Uchiha clan, his ponytail hung to about the middle of his shoulder blades, during his fight with Sasuke which led to his death at the age of 21, it was revealed after the incineration of his cloak that his ponytail hung all the way down to about the level of his belly-button or waist. It can only be assumed that in part 1 it was somewhere between the shoulder blades and his waist. Being brothers, Itachi and Sasuke had a similar appearance, but with subtle differences. Itachi's eyes were obviously more intensified and had noticeably longer eyelashes, another distinguishing characteristic. Itachi's hair color appeared slightly duller and with a softer flow to it (possibly representing thinning grey hair which is a result of stress and depression which can be explained by his past, his trauma at age 4, his over-achieving hard work at school, his mission to kill the Uchiha, and his relationship and facade personality towards Sasuke, as well as his fatal sickness. All of this is a lot of stress on a person and Itachi is clearly depressed, explaining his duller hair being grey hairs, and the softer flow due to thinning.); his skin was also slightly darker, however throughout part 2 Sasuke's skin seems to tan slightly leading up to the fight with Itachi, and Itachi's skin seems slightly paler during this fight then it did when he faught Naruto and Kakashi during the rescue Gaara arc, this all due to Sasuke's recent travels with Hebi and Itachi mostly staying hidden in Akatsuki hideouts and the Uchiha temple, though this aside Itachi is skill slightly tanner. Itachi's most distinguishing characteristics were the long pronounced creases under his eyes which lengthen throughout the series in both the manga and the anime, in part one they reach his cheek-bones just under his eyes to almost his nose level, in part two they are noticeably longer, stretching almost all the way down his cheeks to the level his mouth is at, this all may be due to stress as well as fatigue, Itachi isn't known to rest often so tire may cause this, as well as his sickness may have enhanced these. Itachi also is quite strong and broad-shouldered, resembling a somewhat lean muscular build, in part one his arms are thick when he attacks Sasuke and when he removed his hat, representing strong arms, however in part two during the Sasuke fight, when he reaches up to take Sasuke's left eye his wrist and forearm are much thinner than before, and the tendons on his hand show from time to time, and when his cloak is incinerated his arms are shown to be thinner than most assume. In the Manga his arms are much thicker after the loss of the cloak than they are in the anime, however the anime tried to represent the fact, possibly, that his sickness is weakening him, plus he hasnt exactly had time to work out, the manga kept his strong built appearance however, it can only be assumed his muscle loss is due to time and sickness.

When he lived in Konoha, his casual clothes would consist of a black shirt with a large Uchiha clan symbol on the back, and black pants with a weapons pouch strapped to them. When on duty, he would wear the traditional ANBU uniform, although he was never shown wearing a mask. As a member of Akatsuki he wore the traditional Akatsuki cloak and usually kept the center of it buttoned down, occasionally resting his left arm on the highest attached buttons instead of putting it through the sleeve. After his cloak was incinerated by Sasuke's Kirin during their fight in Part II, it was revealed that he still wore his casual clothes underneath it, however his casual clothes didnt consist of his Uchiha shirt, like most of akatsuki, his under clothes consisted of a dull blue shirt and pants, white ankle peices connecting his pants and shoes, and what is debated as either fishnet or body mesh underneath. Some akatsuki members such as Deidara and Kakuzu wore sleevless shirts, where Itachi wore a tunic like t-shirt, with a white sash in the belt area due to the length of the shirt. The under material is debated however, Jiraiya wears similar material and when he raises his shirt in the hospital it makes a mesh-metalic sound, and most characters wear this, Naruto and Shikamaru and Hinata for instance, however Temari does as well but not uniformly, she has one knee covered by it and the other thigh and ankle, mesh wouldn't be worn randomly, Ino does this same thing, however their skin is visible so they are explained as fishnet, but what of akatsuki? It makes sense that they would wear mesh armor, and they or colored grey like metal instead of the characters skin color, however not only do cosplay costumes play it off as fishnet, but Deidara tears his off before his death with ease, and the way it hangs and looks in both the manga and the anime are clearly fishnet, and its impossible to just tear Body mesh, plus the sound of it sounded cloth-like, and body mesh would be heavy as well, so the material is up for debate or is whatever the fan chooses thus-far. Like almost all members of Akatsuki, he wore the headband of his home village with a horizontal line gouged through it to symbolize his broken ties with the village (Itachi is secretly still loyal to the village however, this is revealed later). His finger and toe-nail manicure is shown to be purple, most Akatsuki have unique colored nails, Itachi's is purple. On his right ring finger was his Akatsuki ring, which bears the kanji for. Itachi is also shown to consistantly wear a unique necklace after he left Konoha and joined Akatsuki, this necklace is a black string bearing three metal rings upon it, one in the center of the front and the other two resting on his collar-bone. This necklace is an assumed mystery, he never is shown without it after the massacre, it can be assumed by when Madara said that Itachi "killed his parents, family, friends, and lovers" that possibly Itachi had a girlfriend, this necklace could either have been given to him by his lover before she died, perhaps and off-camera drama scene where Itachi explains the truth and his lover hands him her necklace to remember her by, thus he always wears it, or he couldn't tell her and killed her without telling her the truth, but since he truly didnt personally want the massacre, he wanted to remember his lover always, therefore he removed her necklace from her body and wears it in regret of killing her as a memory token of his once lover. Again, this is all assumed presumption and isn't proven in any case, it may not be the truth.

Abilities
Even at a young age, Itachi's intellect and talent showed their brilliance in everything he did, as even his teachers said his progress hardly required any help. In the few battles he had been seen in since the start of the series, Itachi was shown to be an incredibly powerful ninja, as demonstrated by his ability to easily defeat the likes of Deidara, Sasuke Uchiha, Kakashi Hatake and Orochimaru. Despite his pride in his abilities, Kisame Hoshigaki, Itachi's partner in Akatsuki, acknowledged Itachi as the stronger of the two. Even Madara said that Itachi never ceased to amaze him.

Being a pacifist due to his traumatic experiences from the Third Great Shinobi World War, Itachi did not actively take part in battle, typically only acting in self-defense and trying to incapacitate his enemies instead of killing them if possible. It can also be said that in every one of his battles, Itachi's true strength is never displayed, either because of his nonviolent nature or the terminal illness that plagued him.

Jutsu
Itachi was a master of all the Uchiha clan's techniques, along with the Sharingan, and had great prowess with all of the three main types of jutsu. When battling against Kakashi, Kurenai, and Asuma, Kakashi commented that Itachi wasn't fighting with even half of his strength.

Itachi was also noted to be very fast, particularly with his hand movements. This extended to weaving hand seals and throwing weapons, as he was able to reveal a set of shuriken with one hand and then suddenly attack the opponent with a form of ninjutsu. In terms of mobility, he is able to close considerable distances fast enough to appear like teleportation. His speed was such that neither Sasuke nor Kakashi, who are both very adept at using the Sharingan, could follow his movements in either case. Itachi's techniques also often involved usage of crows, both in ninjutsu and genjutsu. This is seen amongst others with his creation of a clone that dissolves into crows and using crows to hide shuriken in them.

As traditional to the Uchiha clan, Itachi could use Fire Release techniques. He was also shown to use Water Release techniques.

Despite his extensive use of genjutsu, Itachi appeared to be quite skilled in taijutsu as well, as demonstrated when he easily dispatched three fellow Uchiha and when he stopped Sasuke's Chidori with one hand and brutally beat the latter during their reunion in the Land of Fire despite Sasuke's extensive taijutsu training for the Chūnin Exam. He was also very proficient wielding a sword, in the same way as throwing shuriken and kunai.

Sharingan
Being of the Uchiha Clan, and as noted by Kakashi, Itachi was a true successor of the Sharingan Eye. From a stationary position, he would study an opponent's movements with his Sharingan and respond accordingly, often with a genjutsu. He could cast a genjutsu by merely pointing at or looking at someone, and could similarly turn an opponent's genjutsu against them with Demonic Illusion: Mirror Heaven and Earth Change. Itachi had trained so much with his eyes that he had reached the stage where he could have his Sharingan activated all the time, with minimal drain on his chakra levels.

Mangekyō Sharingan
Itachi possessed the Mangekyō Sharingan, which increased his already great power, and enabled him to use his most powerful techniques. With his left eye, he could use Tsukuyomi, a genjutsu that traps an opponent's mind in an illusory world, torturing them for what seems like days in a matter of seconds. With his right eye he could use Amaterasu, a ninjutsu which allowed him to create a black flame that he could direct by moving his eye to burn through seemingly anything in its path, including fire itself. His final technique was Susanoo, the "Raging God of Battle", a technique that uses both eyes to manifest itself as a spectral being. It wielded the Totsuka Sword, an ethereal sword with the ability to seal anything it pierces into the gourd that serves as its hilt, and Yata's Mirror, a shield that could reflect any attack. Zetsu, a fellow Akatsuki member, stated that Itachi's mastery of the Sharingan, combined with the legendary weapons of Susanoo, made him invincible.

Despite his mastery of the Mangekyō Sharingan, Itachi suffered greatly from its side effects. Each of the techniques bestowed by the Mangekyō Sharingan required vast amounts of chakra to perform, and they left Itachi fatigued afterward, to the point of requiring him to deactivating his Sharingan altogether, something that he did not usually need. The other side effect was that his eyesight would worsen as time passed since the awakening of the Mangekyō Sharingan, and the degradation would only increase after every time he used it, which would lead him to eventually go blind from its power, with his Sharingan forever sealed away. By the time Itachi activated his Mangekyō Sharingan during his final fight with Sasuke, Itachi's eyesight is so badly damaged, that Sasuke appeared to be only a messy blur. Itachi was so close to blindness that by the time he activated Susanoo in his final fight, both Sharingan had lost the Mangekyō design in them, with only the red iris remaining. Despite the stress his body was under that was slowly killing him he was still able, in his last moments, to perform his own Fūinjutsu.

Search for Tsunade arc
After the Invasion of Konoha and the death of the Third Hokage, Itachi and Kisame infiltrated the Konoha to find Naruto Uzumaki, the container of the Nine-Tailed Demon Fox. Before searching for Naruto, the two quickly stopped for tea after a suggestion from Kisame. While there, however, their uncommon clothes drew the attention of Kakashi Hatake, who had Asuma Sarutobi and Kurenai Yūhi follow them. Itachi and Kisame nearly managed to escape village, before Asuma and Kurenai managed to catch up with them in time.

When the two revealed their identities, Itachi and Kisame were quick to battle Asuma and Kurenai after they refused to leave. Despite their high ranks of Jōnin, Asuma and Kurenai stood little chance against the two Akatsuki members. However, the arrival of Kakashi managed to keep Asuma and Kurenai from receiving any major injuries. After a short skirmish with Kakashi, Itachi activated his Mangekyō Sharingan and used Tsukuyomi to attack Kakashi's mind and spirit, which afterwards left the latter confined to bed for several days. After Kakashi revealed he had knowledge of Akatsuki, Itachi ordered Kisame to kidnap Kakashi and to kill Asuma and Kurenai. However, Might Guy then showed up, revealing that he had already told the ANBU about the two Akatsuki members' presence. Itachi and Kisame retreated, saying that they didn't want to start a war.

Itachi and Kisame tracked Naruto to a hotel where he was staying with Jiraiya at the time. Uninterested in provoking a Sannin, Itachi used a genjutsu on a pretty woman to draw Jiraiya away from Naruto. Taking the chance, Itachi and Kisame confronted Naruto, although, at the very same moment, Sasuke arrived to seek vengeance on his brother. Itachi handled his brother with ease while Kisame and Naruto watched, although Jiraiya arrived in time to save the two boys, having not fallen for the hypnotized woman's charm as he knew that pretty women did not usually show interest in him.

Jiraiya immediately asked Itachi and Kisame if their real goal was kidnapping Naruto. They confirmed this and Itachi understood that Jiraiya was the one who had told Kakashi about Akatsuki. Although Jiraiya wished to fight them himself and prevent others from getting hurt, he honored Sasuke's feelings, and allowed him to fight Itachi instead. Itachi, however, only proved Jiraiya wrong in letting Sasuke fight by using his Mangekyō Sharingan on his younger brother, thus reaffirming his need to get stronger. Jiraiya saved Sasuke in time by using the Summoning: Toad Mouth Bind, which transformed the entire hotel hallway into a toad's esophagus to trap Itachi and Kisame. Despite Jiraiya's claim that no-one had escaped this technique before, the two Akatsuki partners managed to evade capture and death using Itachi's Amaterasu, which left him exhausted.

Although he was actually supposed to capture Naruto, Itachi's only reason for returning to Konoha after the death of the Third Hokage was to remind Danzō and the other two village elders that he was still alive and not to harm his younger brother.

Rescue Gaara arc
While Akatsuki was sealing the One-Tailed Shukaku, they discovered that Team 7 and Chiyo were en-route to their location. Itachi volunteered to distract them, so Pain used the Shapeshifting Technique on Yūra to create a body-double for Itachi. The lookalike, under Itachi's control, engaged the Konoha ninja. He was impressed by Naruto and Kakashi's improvements in strength but, because the clone had only a portion of his ordinary strength, it was killed by Naruto's Great Ball Rasengan. Nevertheless, he had bought enough time.

Hunt for Itachi arc
As Sasuke was defeating Orochimaru, Itachi sensed something odd. Kisame asked him what was wrong, to which Itachi replied, "No, it's nothing." Following Kisame's capture of the Four-Tailed Monkey, Itachi and Kisame met with the rest of Akatsuki. There, they discovered that Sasuke, after being trained by Orochimaru for two and a half years, had killed his teacher. Sometime after the Four Tails was sealed, Zetsu informed them that Sasuke had been killed by Deidara's C0. Kisame asked Itachi if he was upset that Sasuke's death had left him as the only Uchiha because in the rain he looked as if he were crying. However, Itachi remarked that Sasuke wasn't dead, and alluded to the fact that there was still another Uchiha regardless.

Knowing that his end was near, one of Itachi's shadow clones confronted Naruto, who was looking for Sasuke. Although he claimed he wished only to talk, Itachi was forced to defend himself against Naruto's attacks. After fending off Naruto, Itachi asked why he showed so much interest in Sasuke, a traitor to Konoha. Naruto replied that he was more of a brother to Sasuke than Itachi had ever been, and that he would do whatever it took to bring Sasuke home. This causes Itachi to give a small smile, followed up by asking if he would always feel that way, even if Sasuke attacked Konoha. Naruto replied only that, if that happened, he would stop Sasuke without killing him and protect the village. Content with this answer, Itachi gave some of his power to Naruto, by forcing him to swallow one of his crows, and hoped he would never have to use it.

After his business with Naruto was done, another of Itachi's shadow clones went to meet with Sasuke. Sasuke displayed a dramatic improvement in his abilities during their confrontation, so Itachi agreed to have their final battle at the Abandoned Uchiha Stronghold. He waited there for Sasuke's arrival, instructing Kisame to not let the other members of Sasuke's team, interfere with their battle. Itachi and Sasuke met face-to-face and, while exchanging genjutsu, had a conversation about the Uchiha, Madara, and Itachi's "true" motives of wanting to take Sasuke's eyes. When Sasuke managed to escape Itachi's Tsukuyomi, the genjutsu battle ended and the ninjutsu battle began.

Itachi used Amaterasu, but Sasuke shielded himself by shedding his skin, a technique he was able to use because of Orochimaru being sealed within him. Using the shed skin as a decoy Sasuke went below and fired a Fire Release: Great Dragon Fire Technique at Itachi's direction above although he only managed to burn away one of Itachi's sleeves. Out of chakra, he tells Itachi about his final jutsu that like Amaterasu it is impossible to avoid. Sasuke then used his trump card, on Itachi, who had his Akatsuki cloak burned off as a result.

However, Itachi managed to survive by using Susanoo to defend himself. With Kirin having expended all of Sasuke's chakra, Orochimaru was able to break free and violently appear through his Eight Branches Technique. However Itachi was easily able to cut off the seven snake heads, leaving only one behind whose mouth Orochimaru appeared out of and thanked Itachi for pushing Sasuke so far thus setting him free and allowing him to take control of Sasuke's body. Itachi, however, stabbed Orochimaru with the Totsuka sword to seal him away with Susanoo thereby removing the cursed seal from Sasuke's body.

As Itachi began to weaken, thus weakening Susanoo, Sasuke saw an opportunity to strike, but in vain, as Susanoo was still able to protect Itachi. His last option gone, Sasuke was pushed against a wall and left helpless as Itachi walked up close to him and seemed to be reaching for Sasuke's eyes. However, he instead poked Sasuke's forehead and smiled before saying, "Forgive me Sasuke... ...It ends with this" a reference to Itachi constantly poking of Sasuke on the head when they were younger. With that act Itachi finally gave in to his fatal illness, which he had been using medication and sheer willpower to fend off, and died.

Fourth Shinobi World War arc
Itachi was summoned by Kabuto Yakushi through the Summoning: Impure World Resurrection, along with Nagato, Kakuzu, Sasori, and Deidara as a demonstration of power to Madara.

Legacy
Madara collected Sasuke, tended to his wounds, and tried to befriend him when he awoke. When he removed his mask while doing the latter, Sasuke reflexively used Amaterasu on him. After quelling the flames, Madara explained that the Amaterasu had been inserted in Sasuke by Itachi, intended to protect him from Madara and whatever he might say. Sasuke was perplexed, so Madara went onto detail the history of the Uchiha clan, and the truth behind Itachi's life. Towards the end of his story, he explained that Itachi had been dying of disease, but had kept himself going with medicine so that he could die by Sasuke's hands, stating that if Itachi had battled with all his strength they wouldn't be having that conversation. He also stated that Itachi had pushed Sasuke to his limits during their battle to draw out Orochimaru, so that he could remove the latter's influence from his beloved little brother.

Sasuke was unwilling to believe the story. Madara persisted, saying that Itachi had entrusted the Uchiha name to Sasuke, hoping he would rebuild the clan on a new foundation of honor and nobility. For the sake of Konoha, and for Sasuke, he had been willing to die as a traitor and criminal. He had traded honor for disgrace and Sasuke's love for his hatred, and even then he had died smiling. Finally accepting the truth, Sasuke was crushed to find that the brother he had hated had actually been looking out for him all along. Upon realizing the truth, he resolved to take vengeance against Konoha for the massacre of his clan and the fate they placed on his brother, regardless of Itachi's attachment to the village. He also agreed to start working with Madara and, as a result, is classified as an international criminal, something Itachi had tried to prevent.

Sasuke initially refused to transplant Itachi's eyes into his own sockets, due to the two of them having completely different visions of the future. However, after his reckless overuse of his own Mangekyō Sharingan from battling Killer Bee, A, Danzō Shimura and Team 7, Sasuke's eyesight had greatly deteriorated. As such, he decided to abandon his refusal, and take Itachi's eyes to use them to destroy Naruto at full power. The transplant was then commenced by Madara, and Sasuke felt Itachi's power flowing through him.

Trivia

 * can be translated as "weasel".
 * According to Pain, Itachi's reason for joining the Akatsuki was "ideology".
 * Itachi ranked highly in the Shonen Jump popularity polls for the series, continuously placing in the top ten and reaching sixth place once.
 * He and Kisame were the first active Akatsuki members to appear.
 * Itachi and Kisame made a brief cameo appearance in the Konoha Sports Festival OVA, where they were standing in line to use the bathroom, along with many other random characters.
 * According to the Third Naruto Databook:
 * Itachi's hobby was visiting traditional Japanese cafes.
 * Itachi's favorite foods were cabbage and onigiri with seaweed in it, while his least favorite was steak.
 * Itachi had completed 340 official missions in total: 53 D-rank, 152 C-rank, 134 B-rank, 0 A-rank and 1 S-rank.
 * Itachi's favorite word was.
 * Itachi had always poked his younger brother, Sasuke Uchiha, in the forehead when they were younger, saying . This is referred to very poignantly with Itachi's last words, as he pokes his brother's forehead again and says,

Quotes

 * (To Younger Sasuke)
 * (To Sasuke) "You and I are flesh and blood. I'm always going to be there for you, even if it's only as an obstacle for you to overcome. Even if you do hate me. That's what big brothers are for."
 * (To Uchiha Clansmen) "I've had enough, there's no hope left for this pathetic clan."
 * "The people of this clan are all the same. You focus on the trivial, and lose sight of what's most important. Change is impossible, in this fog of ignorance. How can we evolve when regulation is all we know?"
 * (To Sasuke) "Foolish little brother, if you wish to kill me, hate me, detest me. And yet survive in an unsightly way. Run, run and cling to life."
 * (To Sasuke) "People live their lives bound by what they accept as correct and true. That's how they define "reality". But what does it mean to be "correct" or "true"? Merely vague concepts ... their "reality" may all be a mirage. Can we consider them to simply be living in their own world, shaped by their beliefs?"
 * (Last words)