Who is Sasuke's brother

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Itachi Uchiha As a boy he was the pride of the Uchiha clan and was considered a genius. At the age of 7 he graduated from the academy, three years later became Chunin and three years later became the leader of an ANBU unit. But the greater his success, the more his own clan disgusted him. He had the feeling that they were not using their power to the limit and were effeminate. In addition, he did not agree that no one would reveal the secret of their clan, which has been hidden since the clan was founded. In the end, he even went so far as to kill his best friend, Shisui Uchiha, in order to maintain the power of the Mangekyou Sharingan, and then to kill all members of his own clan except his little brother Sasuke. With this he had the feeling that he could still be of use for his plans, which is why he had ordered him to hate and despise him so that one day he could become as strong as he is.

After destroying his clan, Itachi fled Konoha and joined the mysterious Akatsuki organization. Only many years later did he return to Konoha to capture the Jinchuuriki of Kyubi, Naruto Uzumaki, with his partner Kisame Hoshigaki. During this operation, however, he was disturbed by Kakashi Hatake, his little brother Sasuke and Sannin Jiraiya. Sasuke thought that his success up to then and the skills he had acquired by then would be enough to defeat Itachi, but he could easily defeat him through the power of the Mangekyou Sharingan. However, after this clash, Itachi and Kisame had to flee because Jiraiya was superior to them. Sasuke, however, when he was healed by Tsunade, harbored a hatred of Naruto from now on, because after a long time his brother was not even a little interested in him, but only in Naruto. So Sasuke made the decision to leave Konoha because he couldn't learn anything there and went to Orochimaru.

For the next two years that Naruto was on his training journey, Itachi and Kisame had goals other than to pursue him. Instead, they helped Akatsuki achieve the organization's goals. So they volunteered when Sasori and Deidara captured the Kazekage Gaara to stop the Konoha ninja and thus secure time for the other members to remove the bijuu from Gaara's body. In this fight Itachi met the group of Naruto Uzumaki, Kakashi Hatake, Sakura Haruno and the Kunoichi from Suna, Chiyo. In this fight Itachi's ability was shown once again, since he, limited to only a fraction of his actual strength, still had the opportunity to entangle Naruto in an enormously effective genjutsu. But this could be broken and, with the help of Kakashi, Naruto also managed to defeat Itachi with his new technique, the Odama Rasengan. It was then revealed that the body Itachi had used and sacrificed during this action was a former councilor of Suna, Yuura

Later, after Sasuke killed Orochimaru and absorbed some of his powers, Itachi realized something. As of now it is not known what it is, however it appears to have something to do with Akatsuki's true goals. Together with Kisame, he set out to meet his little brother. After Sasuke had won the fight against Deidara and drove him to suicide, he too started looking for Itachi. When he met him in a cave, he immediately involved him in a fight that developed in his favor. However, it quickly became clear that he was only fighting one of his brother's doubles when he killed him. The doppelganger instructed him to come to the headquarters of the Uchiha clan as quickly as possible so that they can fight their real battle there.

Arrived at this headquarters, Sasuke separated from his team and made his way to Itachi. He also found this in the temple building, where he sat on a stone throne. The two quickly began their fight and again it became apparent that Sasuke had become significantly stronger, but as before, he only fought against one doppelganger. But Itachi also fell for this trick and was surprised by Sasuke when he sneaked behind the throne and pierced his brother with his sword. Now there was just one last question he wanted answered before ending the fight ...

A hard fight between the brothers ensued, in which the two gave nothing to each other. After only fighting each other on the level of genjutsu at the beginning, they then attacked each other with ninjutsu and gave everything. Itachi told Sasuke the whole story of the Sharingan and also told him everything about Madara Uchiha, her ancestor. Sasuke doesn't want to believe it at first, but after a while he had to admit that Itachi is probably right. However, they do not end their fight and while Sasuke uses his strongest technique, Itachi reveals his strongest technique: Susanoo. With this he not only manages to repel Sasuke's attack, but also to banish Orochimaru, who wanted to escape from Sasuke's body, to another dimension. However, this technique cost him too much strength, so that at the end of the fight he quickly transfers all of his techniques to Sasuke before he collapses dead ...