Itachi Uchiha

Itachi Uchiha is Sasuke's brother who by orders from the Akatsuki; Orochimaru killed the entire Uchiha Clan. Itachi took it upon himself to kill his parents, an act he hesitated to carry out. Both respected his decision to side with the village over the clan, and asked only that he look after Sasuke. He tearfully killed them just before Sasuke returned home from the Academy. Shisui also had betrayed his clan so he devised a plan to use his Kotoamatsukami to make the Uchiha leader plan a peace treaty. But failed when Danzō Shimura stole his right eye. His own options gone, Shisui entrusted his remaining eye to Itachi and begged him to protect the village and their family name before drowning himself in the Naka River. Itachi was anguished by Shisui's death, enough to awaken his Mangekyō Sharingan. After this, Sasuke was found weeping for his dead parents. When Sasuke saw Itachi he looked into his brothers sharingan, with fear. But no death upon him would come so he ran. But Itachi caught him and told him that he wasn't worth killing and that he needed more hatred against him to even touch him.