Name: Uchiha Itachi

Home: The Hidden Leaf Village in the Land of Fire (Konoha).

Status: Itachi is currently 20 years old and is an Akatsuki member hunting down the tailed beats.

Shinobi Rank: Between Sannin and Kage.

Element: Fire

Siblings: Uchiha Sasuke his younger brother.

Family Clan: The former Uchiha clan which has only three remaining members (Sasuke, Itachi, and Obito) after Itachis massacre of his own clan.

Background: Itach was considered a genius and prodigy that comes a long once every few generations, Itachi graduated from the shinobi academy at the age of seven (normally kids graduate at age of 12 or 13) Itachi mastered his Sharingan at the incredible young age of eight and became a Chunin at the age of ten (there are grown men in there 20's and  30's who considered Chunin). Itachi’s father Fugaku Uchiha was the driving force that pushed Itachi at a very early age. Itachi never had enough time to spent with Sasuke (cuz he was always away on missions/training) so Itachi forced his father to spend time with Sasuke by disobeying his father until he would spend time with his younger son.  

At the age of 13 Itachi discovered the Uchiha “secret “(the Uchihas poses demon blood in them and cuz of them being ashamed of that, it is a secret they have sworn to take to the grave with them). But Itachi had very different feelings about his origins (he felt it was something to be proud of and something that should be considered an honor).  At the same time Itachi became the leader of Konoha’s police force (created by the Uchiha clan) the ANBU Black-Ops.  But Itachi’s true feelings lie within proving his own power/capacity to the rest of the world (the only way he could do that was to un-seal the Ten Gu king the demon, who’s blood flows with in the Uchiha’s.

(From here on out its the most resonable/realistic thing that could have happened if u think things thru u will understand y that is) After finding out the un-sealing required three MS users as well as the Charka from the 9 tailed beast the Kyuubi, Itachi discovered one MS user ( the though to be dead Obito Uchiha who agreed to help Itachi in return for Itachis services after wards). Now then after finding out that the MS is achieved after one has experience un-imaginable pain and sorrow (the death of the closest to that person) Itachi knew what he had to do. Itachi picked out the 3rd person who would help him carry out his goal ,his best friend Shisui Uchiha aka “Shisui the Body Flicker” for his mastery of the Body Flicker jutsu and also another cperson who was a few years older than Itachi but also was considered a genius/prodigy like Itachi himself).

Everything was planned out (the 3MS users as well as the Kyuubi who was residing inside of a little orphan boy and kidnaping that boy would require no trouble at all). Now it was time for Itachi to set his plan in motion, Itachi had Shisui meet him by the Nakano River and after explaining his plan (to the man he saw not only as a best friend but as an older brother) he was stunned to find out that Shisui not onl declined Itachis invitation but also opposed Itachi (hoping to bring Itachi to his senses Shisui told Itachi the only way that he would accomplish his goal was to get by him, little did he know that those were the last words he would ever speak). Itachi lashed out at the completely stunned Shisui and sliced him across his throad instantly killing Shisui.

Now enraged by his best friends betrayal Itachi threw Shisui's dead coprs into the Nakano River and wrote a suicide note that he placed in Shisui’s pocket. The next day Shisui’s body was found along with the suicide note, but the written note reflected Itachis feeling in it (“The Uchiha’s are hopless, and I’m tired of serving their every desire and keeping their darkest secrets”). A couple of days after Shisui’s death some of the Uchiha clan members confronted Itachi (blaming him for his best friends death) but were shocked when Itachi nearly killed them (Itachi’s father intervened at the last moment).

The next day Fugaku Uchiha told his youngest son Sasuke not to follow in his older brothers  footsteps, as well as at the breakfast table admitting that he absolutely knows nothing about his own son, Itachi. Later that night Itachi decided that his plan would have to wait a few years (the reason being was that Itachi planned to teach  his little brother Sasuke about the MS and also the only other Uchiha besides himself  who possessed the resolve to reach that level of power). Itachi decided to provided Sasuke with a little encouragement by killing the entire Uchiha Clan except Sasuke.

Itachi knew that the only way Sasuke would achieve the level of MS was by revenge, (the power of the MS is achieved by one has experience un-imaginable pain and sorrow ,the death of the closest to that person,) Itachi himself gained that power by making himself feel pain and sorrow for killing his best friend and he achieved that by using his own Sharingan jutsu “Tsukuyomi” on himself, (Kakashi achieved his MS in a similar way, remember all of the ones closest to Kakashi were already dead he said that himself).

He knew if he stayed any longer ppl would find out what he had done and if he just left the village he would be considered a criminal and hunted down by Konoha, and also Itachi would not be able to return to the village when Sasuke came of age and power so that he could achieve MS. So Itachi put his plan into action, and at the age of fifteen while Sasuke was at school Itachi gathered all of the Uchihas in one place by telling them he knew who killed Shisui, after everyone gathered he told them the truth and then began his massacre of the Uchiha Clan.

Later that night Sasuke returned gome to find his entire clan dead and his brother the only one besides himself alive, and that’s when Itachi told Sasuke everything....

***Note: Itachi got sick and tiard of serving the clan, and doing everything for the clan, he saw himself being consitered a "tool" by the ones around him even by his own father, whatever the Uchihas did was for the benefit of their clan (the same clan that its members were too ashamed to reveal their "true" origins), Itachi saw that, and lost all hope in his "pathetic" clan, the Uchihas had no future (as stated by Itachi that over the years the clan had been getting smaller and smaller) and he wasent going to go down with the clan that only consitered him a "tool".***

***Note: The only reason Itachi told Sasuke the way to activate the MS is to kill the one "closest to you" your best friend was because no one else would be able to get that close to Sasuke cuz Itachi killed all of the family Sasuke ever cared for.***