Itachi

Past

At the age of 7 Itachi had graduated from the top of his class in nin-academy of Konohagakure. At 8, he mastered his Sharingan eye and, at ten, became a Chunin. He became the leader of his own Anbu squad at 13.

Itachi's promise to Sasuke...he could never keep it

Itachi, the star of Konoha, and Sasuke's Rival in love from his parents

He paid no attention to Sasuke as he grew and became better, seeing that he was nowhere near as much of a prodigy as Itachi was. And in the end, he never would be. Itachi did, however, attempt to treat him like a human being. He wanted his eyes to grow up strong, he must have thought.
 

Itachi as an Anbu

He did, however, make his father spend more time with Sasuke by refusing to do missions unless his father went along.

Six months after Itachi became an Anbu squad leader, Itachi began losing ground with the clan. He began to neglect his missions, and was a prime suspect in his best friends death (his best friend had apparently committed suicide, but it was questioned by the clan elders). When a band of invesigators confronted him, he easily defeated them, saying that he had lost faith in the clan. He later apologized at his father's bidding. Itachi's father then began spending more time with Sasuke, trying to steer him away from Itachi's path. In recent flash backs it is revealed that at first, Itachi had a lot of motivation to play with his younger brother, but his mother often forced him to do his homework or some other chore, as if she were trying to keep him from having any form of fun with his younger brother. But, Itachi would tell her that he could always complete his homework later as the assignment was simple. Sasuke had memories of his brother playing hide and seek with him, and finding him, then just using a shadow doppelganger (Kage Bunshin) technique to confuse him even more. When the day was over, he would simply poke him in the forhead and tell him that he could continue this "next time" and would then go home.

Upon the night of the kage bunshin hide and seek game, Sasuke would tell his parents of how much fun they had had playing the game, and how he had lost when Itachi used the doppelganger. Sasuke had hoped to hear some form of positive reply from his parents, who consistently made him feel like he didn't matter, but all they did when they heard about the game was compliment Itachi on learning the kage bunshin technique already, yet again ignoring him and complimenting Itachi for what he could do. Itachi never showed any emotion towards the subject, and never told his parents how he felt about the way they treated his younger brother. The very next day he would be asked by his younger brother to play with him, and he would just poke him in the forehead again saying that next time he would do it. This would happen for several days, until eventually Sasuke requested that he show him how to do a certain shuriken technique. He would finally train Sasuke, and on the way home, after an exhausting afternoon, Itachi would carry him on his back home, and told him some very important things about their relationship. Most importantly, that they were brothers, and as such, that he would always be there for him, whether he loved him or wanted him or not, but that he would always be there for him no matter what happened between them, and as brothers, this was how it would be.

Sasuke, years later would understand

The Clan Slaying

Every one in the clan could sense that their was something extremely wrong, and they did not need Sasuke to be exposed to it. Itachi was becoming more and more like Mudara Uchiha every day.

Later that week, Sasuke returned to the outskirts of Konohagakure after a long bout of training with his precision in kunai, as Itachi had shown him earlier that day. He wanted to become one of Konohagakure's best with Itachi, and he couldn't wait to tell his father where he'd been.

Little did Sasuke know, he would never speak to his father again. Itachi looked down at him under the full moon atop a street lamp. This was to be the one survivor for the clan. Sasuke continued on his way down the streets, yelling "Hello?" every few steps.Konohagakure seemed lonely that night. Nobody was out and about, none at all. Suddenly the horrible images popped into his head. His entire family was dead, and he was the last one left. Itachi sent these thoughts into

Itachi, staring off after killing his family in the pale moonlit streets of Konoha

Sasuke's brain so that he would have more fear and adrenaline. To this day Itachi never revealled why he killed his clan, and has only responded with "To test my limits" when asked by Sasuke and many others. He then told Sasuke how he obtained the Mangyeko Sharingan, by killing your best friend.

So it would seem Itachi had assistance...

This drove Sasuke insane for years, and he still wonders why on earth Itachi would tell him such maddening things. It also appears that Itachi had some help on the night of the murders from Madara Uchiha, as he revealed himself in a recent manga chapter

The Akatsuki

Itachi, at some point, joined Akatsuki , and when Orochimaru attempted to defect and steal Itachi's body, Itachi disabled him and severed his left hand and forced Orochimaru to flee. This caused Orochimaru to lose his Akatsuki ring, thus banning him as a member. Orochimaru, however, kept his lost hand as a reminder, and did not get affiliated with the Akatsuki afterwords, until much later when he was within Sasuke's body to fight Itachi.

The Return to Konoha

Later, in part two, Itachi fought the team 7 when they attempted to retrieve a captured Gaara.

Itachi appeared on their path when the team of Chiyo, Kakashi , Sakura, and Naruto . Kakashi and Itachi began to battle, when Kakashi revealed that he wouldn't be able to take Sasuke's older brother down without Naruto's help. he also told him that he was extremely dangerous. This made Naruto feel like Kakashi finally trusted him to have his back as an equal, not a Genin student. Kakashi fought Itachi, only to be fooled with his masterful and strategically placed doppelganger Jutsu , forcing Kakashi to fight them two on one. After Kakashi had finally gotten Itachi still by being ht by the skillful ninja's blows with his shadow doppelganger Jutsu , or so he thought, for a few seconds at least, he let Naruto do the rest by attacking him with an enormous shuriken. Naruto had gotten much faster and stronger over the few years past. But, even with all of the training the two fighters had been through, all that this resulted in was a disheartened Naruto, as Itachi simply used a strange Jutsu that enabled him to change his body into ravens, and begin flight.

Murder of crows

Presently, Itachi is being targeted by Naruto, Kiba, Shino, Sakura, Sai, Yamato, Kakashi, Hinata, Sasuke, Juugo, Suigetsu, and Karin.

After Sasuke's supposed death at the hands of Deidara, Itachi appeared to be crying in the rain, but when Kisame commented on this, and the fact that Sasuke's death would make him the last member of the Uchiha Clan, Itachi stated that Sasuke was not dead, and that the storm had passed.

Naruto, following a bird covered in Sasuke's scent, Hid in a tree as he saw Sharingan, beliving them to belong to Sasuke, but they were revealed to be Itachi's, and he ordered Naruto to come down from the tree he was hiding in. Naruto tries to attack Itachi, but he informs Naruto that he only wishes to speak with him on an unknown subject.

Sasuke vs. Itachi

Itachi goes to meet Sasuke in a location unrevealed. Sasuke attempts to kill Itachi but it turns out to be a Shadow Clone. Itachi tells Sasuke to meet him at the Secret Uchiha Hideout where they can finish their fight there. Upon Sasuke's arrival, he immediately attacks Itachi.

Then Sasuke faces off with Itachi who's sitting in a stone chair, with Zetsu secretly watching. They start off with taijutsu where they seem pretty even, Sasuke uses Chidori Current to electrify the floor, forcing Itachi into the air where Sasuke stabs him... but it's not the real Itachi, the real Itachi is still sitting in the chair... then the real Itachi gets stabbed from behind. It turns out that wasn't the real Sasuke either.

Sasuke then starts asking Itachi questions about who the other Mangekyou Sharingan user is that Itachi mentioned all those years ago, and who helped him wipe out the clan... saying he's powerful, but not that powerful. Itachi said it was Madara Uchiha and Sasuke thought he was lying because Madara's supposed to be dead, then Itachi starts explaining the difference between seeing reality and knowing reality. Sasuke then quickly turns behind himself and uses his Chidori Sword, almost striking Itachi in the face... no, Itachi didn't move, the Itachi in the chair that Sasuke stabbed wasn't the real Itachi either, the real Itachi is sitting in a chair BEHIND the one Sasuke stabbed. Zetsu then comments how neither of them have moved an inch since Sasuke walked in, and assumed that they must be having a battle of genjutsu.

Itachi then starts explained through genjutsu about the Mangekyou Sharingan and revealed some of Madara's past, such as creating Akatsuki and hiding in it's shadow and becoming Itachi's teacher. He says that Madara was the first to awaken the Mangekyou Sharingan while competing with his younger brother, then Madara's younger brother did. He then said that Madara was also the first to discover the downside of the Mangekyou Sharingan and went blind. He was then "possessed" by the Mangekyou Sharingan which sought new light and stole his younger brother's eyes and gained a new more powerful Mangekyou Sharingan that would never lose it's "light" and gained a new technique. After this the Uchihas started killing each other trying to also gain the Eternal Mangekyou Sharingan. Madara then took control of many ninja clans and allied with the leader of the Senju clan and they created Konoha.

Sasuke's Sharingan...taken right before his very eye

Itachi then breaks it all down... Sasuke is Itachi's "spare" pair of Sharingan eyes. Itachi had been planning on taking Sasuke's eyes all along. Sasuke then removes the wrapping from his forearms revealing seals, he pulls shurikens out of these seals and throws them at Itachi whom deflects them with his own shurikens. They then grapple each other and Itachi creates a Shadow Clone which throws kunai at Sasuke, a snake however comes out of Sasuke's body and wraps around him, protecting him from the kunais. The two Itachi's regroup and Sasuke unseals a giant shuriken that he throws and the Shadow Clone is destroyed trying to block it, but turns into a flock of crows that distract Sasuke while Itachi kicks him against the wall and holds him there and pulls out Sasuke's left eye and places it in a jar. Itachi then reaches for the right eye but Sasuke uses Curse Seal level 2 and breaks free... literally, it was Tsukiyomi and Sasuke managed to break out of it. Itachi's left eye was then put through a lot of pain from Sasuke breaking free.

One half of Zetsu is in disbelief that Sasuke could break free without having a Mangekyou Sharingan himself, but the other half of Zetsu responded that Sasuke must have mastered the normal Sharingan to a point that Itachi hasn't and that an expert with a stone can beat a novice with a shuriken. Itachi then readies to use Amaterasu but Sasuke unseals a giant shuriken from the seal on his arm and throws it, Itachi ducks under it but realizes that there's another hidden in the top one's shadow and leaps between the two. They're rigged however and Sasuke, by pulling on a string attached to them, makes the blades shoot in all different directions, one of which hits Itachi in the leg. Sasuke uses the Grand Fireball and Itachi leaps out of the way, Sasuke follows and Itachi then counters with his own Grand Fireball, but Sasuke partially transforms into his level 2 form and blocks with his wing. They then square off and both use Grand Fireball. Itachi's losing the struggle and finally uses Amaterasu which starts engulfing Sasuke's fireball.

The Power of Amaterasu

Amaterasu stops after devouring Sasuke's technique, Sasuke then runs to avoid Itachi's next attempt. However, Itachi makes Amaterasu chase Sasuke until it finally touches his wing, Sasuke collapses on the ground where his body is burning. Now blind in his right eye, Itachi goes to retrieve his "prize," but Sasuke's body shrivels up; it's revealed that Sasuke used his Chidori to break a whole on the roof and used Orochimaru's skin shedding technique and slide down to the surface below. That technique gave Sasuke a completely new body unharmed by Amaterasu, however it depleted a great deal of chakra.

Having walked into Sasuke's trap, he unleashes three Great Dragon Fireballs from beneath Itachi. Itachi avoids the first two but the third one burns his arm and they ascend into the clouds which begin to churn and turn dark. Though Sasuke is nearly out of chakra, he tried to miss on purpose, using Itachi's Amaterasu combined with his own technique to create a hot updraft to form storm clouds. Then by using his chakra, Sasuke guides a naturally occurring lightning bolt towards Itachi which strikes him.

Sasuke's final attack, the dragon of lightning, Kirin

Sasuke believes that he has won, however an almost completely blind Itachi stands up and is shown standing in the center of a giant spectral skeleton's ribcage. He says that he would had died, but now it's time to use his final technique, "Susanoo." Itachi explains that Susanoo can be released after using both Tsukiyomi and Amaterasu and the skeleton surrounding Itachi starts to take a humanoid appearance. Orochimaru starts to whisper in Sasuke's head, telling him that he can help Sasuke exact his revenge. A white snake appears from Sasuke's shoulder and he transforms into a giant eight-headed snake. He attacks Itachi, but Susanoo forms a sword from a gourd that he's holding and chops off each of the snake's heads in the struggle.

Final secret: Susanoo

Itachi then begins to walk over to Sasuke, but coughs blood and grabs his chest in pain while Susanoo starts to fade; Zetsu comments that Susanoo is not without it's drawbacks. Seeing this as an opening, Sasuke attacks with multiple explosive kunai's, but Susanoo blocks them with his shield. Sasuke unseals several explosive kunais from a scroll and throws them at Itachi, but Susanoo once again blocks them with his shield. Zetsu comments that he recognizes Susanoo's shield as the Yata mirror, one of the three sacred treasures which deflects whatever hits it. Sasuke charges at Itachi with his sword, but to no avail.

Sniff...

Itachi slowly crept up to Sasuke, looking like he was in a zombie state, craving Sasuke's eyes. He looked at him, tired and worn from using every powerful Kekkai Genkai he had. Itachi slowly reached forward with his blood covered right hand towards Sasuke's face... Itachi tapped his forehead, the blood covered finger slowly dragged itself down Sasuke's face as he collapsed. Sasuke looked into the sky, sweating and heaving, as the pride of the Uchiha clan lay dead next to him.

The Truth

To  Sasuke's disbelief, it would later be revealed by Tobi, aka Madara Uchiha, that Itachi, in all of his dark deeds and ways, had actually done all of these seeming crimes to keep Sasuke safe. As it would turn out, when Itachi poked Sasuke in his forehead, seconds before his death, he had transferred the techniques of his Mangyekou eyes. Sasuke, of course, did not believe him at all, and went into a state of rage and confusion, saying that there was no earthly way that he would have done that.

The good old days for Sasuke