Naruto Uzumaki, there current target, and shell for the Nine-Tailed Fox Demon (Kyuubi). There mission is to capture him and remove the demon from him, so that they may possess the unlimited chakra. Naruto himself, is an eccentric kid whom was hated by everybody most of his life due to what was inside of him.
Sasuke Uchiha is Itachi's younger brother and one of the only remaining Uchihas. Sasuke's goal in life is to kill Itachi, to avenge his family, and to restore his clan (which Itachi destroyed). Sasuke is desperate for power, joining the dark side with Orochimaru to obtain power. However, as Itachi ssays during most of their encounters, Sasuke's hate is not strong enough, and he has very little capability to kill Itachi. However, when Itachi told him about the Mangekyou Sharingan (kill your best friend for more power), Sasuke could not kill Naruto, proving despite it all, he still ha emotions, and some things mean more then killing his brother.
Orochimaru, and his loyal servant Kabuto, holds power over many ninjas, including the Sound Village. His goal is to obtain power and be the strongest ninja to exist. He was a previous member of the Akatsuki, but left soon after Itachi joined. He hates Itachi because Itachi is stronger then him.
Zabuza Momochi and Raiga Kurosuki are two known members of the Swordsman of the Mist, which Kisame used to be a member of. His relation to them, work partners aside, is unknown. Zabuza gained an apprentice boy named Haku, whom he treated as a tool (although towards their death, he showed some caring towards him), while Raiga has Ranmaru, whom he treats as a partner. Both of the servants serve the purpose as apprentices and have kekkei genkai. Both Zabuza and Raiga were killed, however Haku died protecting Zabuza, while Ranmaru went on with his life afterwards.
Akatsuki, an assassination squad filled with S-Rank missing-nin, is led by the mysterious Leader (picture 1). Nothing is known about him except the color of his eyes (red) and the fact that he is powerful. Deidara (picture 2) has a scope in his eye socket (note that one eye is covered by his hair), he can control clay and has a mouth on each of his hands. His partner was previously Sasori, but it is now Tobi. Hidan and Kakuzu (pictures 3/4) are more recent members of the group. Hidan is a religious man, dedicated to a religion where anything that isn't killing ruthlessly or causing destruction is a sin. Kakuzu doesn't believe in any of that, he is in all of this for the money, as the greediest member of the squad. Tobi (picture 5) is a respectful newbie, whom is more carefree and goofy, unlike the more serious Akatsuki members. Zetsu seems to be a spy/hunter-nin for the group, although not much is known about him. He is a plant-guy (Venus fly trap on his head~), and he can merge with the ground and plants. Finally Sasori (last image) is dead... but when he was alive he was a puppeteer. The only part of him that was alive was his heart, and his body was merely another puppet.
Fugaku (image 1) and Mikoto (image 2) are Itachi and Sasuke's parents. They were killed by Itachi. Among other relatives, Inabi, Tekka, Teyaki, Uruchi, Yashiro, and possibly others were killed. Shisui was the first to be killed in order to obtain the Mangekyo Sharingan. Shisui was Itachi's best friend, cousin, role model, and big brother figure. Other known Uchihas are Madara and Obito. Obito was killed when he was 13 (before massacre), giving Kakashi his Sharingan eye. Madara is an Uchiha with little information, mostly the Kyuubi knew he had great chakra (which is now in Sasuke). While it is not confirmed, it is most probable that he is dead, whether it be through old age/battle (the Kyuubi lives longer then humans) or if it were through the massacre.
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