Uchiha Itachi was Sasuke Uchiha`s older brother,an S-Rank missing-nin from Konoha gakure and a prominant member of Akatsuki who was parternered with Kisame Hoshikage.
Itachi was born into 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 power 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 sharing an at age 8,passed the chunin 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 neglacting his youngest son,Sasuke.however,during this time Itachi showed great affection towards his little brother and even encourged to come to the academy enrollment ceremony for Sasuke.
Ever since his first appearance,Itachi had always been mysterious,and had acted has 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 seen 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 then 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 extreamly 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 decieved and even then almost instantly realize the truth.despite his status as a wanted criminal,and having wiped out his clans,Itachi took no enjoyment in violence or combat,instead preferring to avoid battle or,if this was not possible,and it as quickly as he could.
Itachi`s only intial interest was in Akatsuki`s goals,and his only loyalties appeared to be to the organization and his 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 respectfull personality,although his courtesy was rarely retured by the other members.