Sasuke is the last Uchiha currently alive. He as got his revenge on itachi and is looking for danzo. He is apart of team hebi, he left his old team which is known as team 7 to train under orochimaru so he could gain more power... He is cold, distant and unemotional. He is not looking for friends or relationships at all. he does not show mercy and he is very powerful. He is ruthless in the battlefield and  possesses Sharingan and Mangekyo Sharingan. He also gets annoyed very easily. 