Uchiha Sasuke

Fugaku Uchiha (Father) Mikoto Uchiha (Mother) Itachi Uchiha (Brother)

Shinto

Sasuke was a happy child, eager to please and be worthy of his clan name. One of Sasuke's most significant bonds is the one he has with his older brother, Itachi, who by merely being mentioned can elicit strong reactions from Sasuke's otherwise calm demeanour. Sasuke adored Itachi when he was a boy, enjoying his company above all others'; as an infant, he would cry whenever he was held by someone besides Itachi and would immediately be happy once held by his big brother again. When Itachi murdered the rest of the Uchiha clan, Sasuke was crushed not only by the loss of his family but also by what Itachi told him: that he had never loved Sasuke. Sasuke devotes years of his life to avenging their family by killing Itachi, which Itachi encourages whenever they meet. At the same time however, he became determined to do so through his own means, including rejecting Itachi's instructions of obtaining the Mangekyō Sharingan for power, simply to not give Itachi the satisfaction. With his new outlook, he became cold toward others, unmoved by and uninterested in what they do or think of him, choosing instead to keep to himself. He stopped using honourifics, something considered rude in the Japanese language. His only goal in life became to take revenge for his clan's deaths by any means, even if it meant acquiring power that wasn't his own.   In his pursuit for the power to take his revenge, whenever he meets new people, he makes an evaluation of their abilities: those he perceives to be weaker than himself he arrogantly disregards, giving them little attention so that they won't hold him back; those he perceives as stronger he fixates over and tries to surpass. As a member of Team 7 he is repeatedly exposed to Kakashi Hatake's philosophy that there is strength in teamwork. For a time, Sasuke accepts this, experiencing it first-hand on several of Team 7's missions. He even become attached to his teammates and started to forget the vengeance he craved, achieving after so many years a measure of happiness. However, between both the manipulations of Orochimaru and meeting Itachi again in Part I, where he was and is utterly defeated, Sasuke decides to sever all ties to his village in a single-minded pursuit of power, leaving Konoha to focus solely on himself. Kakashi tried to help Sasuke realise the contradiction in his viewpoint: he is driven to gain power because he lost his family, yet sacrifices the family he still has (Team 7) in order to gain that power, which did have a profound impact on Sasuke and would have turned him away from the path of darkness had he not been influenced by the Sound Four.   So focused on vengeance, he willingly accepted Orochimaru's offer of power, seeking out the Sannin to train Sasuke in all he knew, even allowing Orochimaru to experiment on him despite knowing the man was using him for his own gain. Ultimately however, Sasuke decided that letting himself be used by Orochimaru would be a disgrace to his clan, turning on Orochimaru and acquires new teammates with abilities that could further his goals. Sasuke initially retained his morals by setting a firm no-kill policy for himself and his team against those unrelated to his revenge and openly expressing disgust at Orochimaru for his horrific experiments. In addition, despite becoming cold towards his old team, Sasuke did become attached to his new teammates, still subconsciously holding a notion of teamwork, comparing them to the bond he had with Team 7 and pushing himself to extremes to save them.