Naruto Charater - Uchiha Sasuke

When first introduced during his assignment to Team 7, Sasuke displays a great indifference to his teammates. Feeling that his abilities are far superior to their own, he is unwilling to cooperate with Naruto Uzumaki or Sakura Haruno, as doing so would do nothing to help him kill Itachi. These perceptions are quickly proven wrong, for despite their failings, Sakura is an excellent source of information and competition with Naruto acts as an effective way to get stronger. While he retains a confidence in himself throughout the series, Sasuke increasingly relies on his friends over the course of Part I. As he starts to get close to others he also begins to risk his own life to save them, even though his death would leave him unable to gain vengeance on Itachi.

Although Sasuke becomes content with a life of happiness in Konohagakure, he never allows his ambition to gain power to leave his thoughts. During his Part I battles with characters such as Haku and Gaara, Sasuke tests his abilities against those of progressively stronger ninja, in the process discovering the weakpoints he needs to overcome. While initially complacent with his development, Naruto quickly starts to grow stronger at a faster rate. This, coupled with his quick defeat by Itachi during a brief return to Konoha, leads Sasuke to believe that his growth is slowing. In an attempt to reassess his strength, he begins to treat his friends as opponents so as to test his abilities against their own.

Dissatisfied with his progress in Konoha and believing Orochimaru holds the keys to getting strong enough to kill Itachi, Sasuke defects from Konoha at the end of Part I. Naruto attempts to stop him but Sasuke, believing the death of Naruto, his closest friend, will give him the desired power, tries to kill him instead. He is ultimately unable to follow through with this idea, thinking that is what Itachi would have wanted, and instead continues on to Orochimaru. In the two-and-a-half years he spends with Orochimaru, Sasuke's goal to kill Itachi takes precedence above all else; he is willing to give his body to Orochimaru if it means killing Itachi, and later turns against Orochimaru after reaching the conclusion that he can learn nothing else of value. After achieving his goal of bringing about Itachi's death, in the process learning of how he was manipulated by Konoha, Sasuke abandons all of his hate for Itachi and resolves to destroy Konoha for both of their sakes.

(Original Writeup is retrieved from Wikipedia)

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