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Here are some facts I found on all the Akatsuki members. ninja

Itachi Uchiha
Age: 17-18 in Part I, 20 in Part II
Ring: 朱 ("scarlet", "bloody", "crimson")
Ring position: Right ring finger
Partner: Kisame Hoshigaki
Itachi Uchiha is a missing-nin from Konohagakure and is partnered with Kisame Hoshigaki. During his time in Konoha, Itachi's prodigious talents and rapid development into a skilled ninja earned great attention from his family, the Uchiha clan. His skills were such that his family focused all of its attention on him, ignoring Itachi's younger brother, Sasuke Uchiha, in the process. Over time Itachi began to distance himself from the village and his family, eventually becoming a prime suspect in his best friend, Shisui Uchiha's, death. Before the death could be properly investigated, Itachi killed all the members of the Uchiha clan in a single night so that he could "test [his] ability". Itachi decided to spare Sasuke, however, stating that he was not worth killing; instead, prior to leaving, Itachi told Sasuke to live hating him and to grow strong enough to avenge the clan. At some point in time Itachi joined Akatsuki. While it stands to reason that he joined after massacring the Uchiha clan, the timeline that has been given throughout the series coupled with his age suggests that he joined the organization prior to killing his clan.
Despite his status as a wanted criminal and murderer, Itachi does not display any open enjoyment of violence or combat. Itachi instead prefers to avoid battle or, if that is not possible, end it as quickly as possible while exerting as little effort as he can. When he does fight Itachi remains stationary, attacking only in defense and to otherwise avoid damage. He also studies an opponent's movements with his Sharingan eyes, using them to properly assess an opponent's actions and respond accordingly. His Sharingan is further enhanced when he activates his Mangekyo Sharingan, the strongest ability a member of the Uchiha clan can gain, which he acquired after he killed Shisui Uchiha. With it, Itachi is able to utilize attacks such as Tsukuyomi (literally "Moon Reader"), a genjutsu that can torture an opponent for what seems like days in a matter of moments and Amaterasu a ninjutsu that sends black flames that are as hot as the sun. Although these abilities are capable of defeating even the strongest opponents, it has been suggested that he is losing his eyesight as a result of repeated use. Itachi is also very adept with standard genjutsu, and can trap others within an illusion by merely pointing or looking at them, as well as turning their own genjutsu against them. He is also noted to be extremely fast with his techniques and movements, extending to his hand signs and weaponry as well.

Kisame Hoshigaki
Age: 29 in Part I, 31 in Part II
Ring: 南 ("south")
Ring position: Left ring finger
Partner: Itachi Uchiha
Kisame Hoshigaki is a missing-nin from Kirigakure and is partnered with Itachi Uchiha. He gets along considerably better with Itachi than most Akatsuki members do with their own partners, immediately doing as Itachi asks of him and always looking out for Itachi's well-being. His former country, the Land of Water, now seeks him out for plotting to overthrow its government and being involved in numerous assassinations. When he was still loyal to Kirigakure, he was one of the Seven Swordsmen of the Mist, a group of ninja that wield particularly large weapons in battle. Kisame's weapon is called Samehada ("shark skin"), a scale-covered sword that shaves off skin instead of cutting and is capable of absorbing untold amounts of chakra. Samehada only allows Kisame to wield it; if anyone else tries to pick it up, spikes protrude from its handle and it returns to Kisame's side. Like other characters who have trained to be one of the Seven Swordsmen, Kisame enjoys mutilating his opponents, as seen when he suggests cutting off Naruto Uzumaki's legs to make him easier to carry.
Kisame has a distinctive shark-like appearance, complete with pale blue skin, small white eyes, gill-like facial structures, and sharp triangular teeth. Even his name, Kisame , means "demon shark". His shark-like qualities carry over to the type of techniques he uses in battle, as he often shapes bodies of water into the forms of sharks that proceed to attack opponents. If there is no water source where he happens to be fighting, Kisame can use Water Release: Exploding Water Shockwave (Suiton: Bakusui Shōha) to create a lake's worth of water to be used for attacks. Kisame is also noted to have a particularly large reserve of chakra; even when he fights at 30% power in one instance his chakra supply is compared to that of a Nine-Tailed Demon Fox-enhanced Naruto Uzumaki.

Konan
Ring: 白 ("white")
Ring position: Right middle finger
Partner: Pain
Konan is the only female ninja in Akatsuki. She is also the only member to call her partner and the Akatsuki leader, Pain, by his name. When she was younger, Konan, Pain, and Yahiko were left orphaned by one of Amegakure's many wars, forcing them to fend for themselves. The three eventually encountered Jiraiya, who looked after them and taught them basic ninjutsu. Jiraiya had believed Konan to have died with Pain and Yahiko some time later.
Konan has a natural talent for origami, as seen with the paper flower she keeps in her hair. This talent extends to her type of jutsu, as she can divide her body into countless numbers of paper sheets. These sheets can be controlled individually and formed into various shapes for a number of purposes, such as butterflies for scouting or generic weapons for attack. Konan can even form wings that mirror her title as "God's Angel" amongst the villagers of Amegakure, as she often carries out Pain's will. Her abilities are constrained while wet, as paper clings to itself and loses its stiffness.

Pain
Ring: 零 ("nothing", "zero")
Ring position: Right thumb
Partner: Konan
Pain (Pein) is the leader of Akatsuki and a conglomerate of six different people. The only common physical characteristic amongst them is their orange hair color, a number of piercings that differ between bodies, and the Rinnegan (literally "Samsara Eye"). The Rinnegan, first possessed by the founder of the ninja world and characterized by a number of concentric circles around the pupil, gives the wielder access to all six types of elemental chakra. It also allows the six Pains to share visual information seamlessly, giving him the ability to coordinate offense and defense as if they were a single entity. Each of the six entities that are Pain were ninja that Jiraiya encountered as he wandered the world. The first body that is seen (third from the right) is that of Yahiko and is able to control rain and can detect the movements and chakra levels of people traveling within it. The body with a large ponytail (pictured on the far left) can summon a wide array of creatures as well all the other five Pains. The fat body (far right) is able to absorb ninjutsu as a form of defense.
The first possessor of the Rinnegan that Jiraiya met was Nagato (長門) who, like Yahiko and Konan, was left orphaned by one of Amegakure's many wars. Once meeting the three, Jiraiya looked after them and taught them basic jutsu before leaving to continue his exploration of the world. Sometime after this, Nagato began to believe that his childhood sufferings had enlightened him, and started to view himself as a god destined to teach the world the meaninglessness of fighting. It is unknown what happened after this, but the Pain entity soon appeared in Amegakure and began a civil war with the government of the time. Pain subsequently ended the war by singlehandedly killing the village's leader, Hanzo. To make sure there were no sympathizers of Hanzo remaining in the village, Pain killed all of Hanzo's family, friends, and affiliates, elevating himself to god-like status amongst the townspeople in the process. Pain now uses the village as his base of operations for Akatsuki, where he is partnered with Konan. Although he directs the actions of the other members and maintains authority over them, Pain takes orders from Tobi.

Tobi
Ring: 玉 ("jewel", "ball"; "jade"; also the king in shogi)
Ring position: Left thumb
Partner: Formerly Deidara
Tobi is a former subordinate of Zetsu. After Sasori's death, Tobi takes his ring, position, and partner (Deidara) in Akatsuki, thereby becoming a full member. Tobi's personality is at odds with the standard amongst Akatsuki members; while most are dedicated and serious, Tobi is more carefree and goofy. These personality traits tend to irritate Deidara, who often attacks Tobi in a comical fashion whenever Tobi unintentionally annoys him. Kisame Hoshigaki, on the other hand, appreciates Tobi's ability to brighten up their "gloomy organization".
After Deidara's suicidal final attack against Sasuke, which Zetsu speculates might have also killed his partner, Tobi is shown to be alive and giving orders to Pain, until then the ostensible leader of Akatsuki. During their conversation, he refers to himself as Madara Uchiha. As Madara, Tobi's personality and speech become completely different, with much less formal diction and a more typically 'villainous' arrogance. It seems, however, that he still has some vested interest in maintaining the illusion of himself as the carefree Tobi: when he encounters a group of Konoha ninja, he returns to his former personality, jokingly offended by the "unfairness" of being outnumbered eight to one. Significantly, he is less overtly cowardly, mocking Naruto's attempt to sneak attack him and warning the Konoha ninja against underestimating him as merely "annoying", even under their advantageous conditions.
Tobi's actual appearance remains a complete mystery, except for a wild shock of black hair. He wears an odd mask that covers his entire face save for his right eye, which like other Uchiha has a Sharingan. He also has several bolts or pins present on the arms of his uniform, now obscured by his Akatsuki cloak. Furthermore, Tobi does not wear a visible headband, though Madara Uchiha is known to originate from Konohagakure. His fighting style is equally shrouded in mystery, as his only notable trait is the ability either to let attacks 'phase' through him or some other means of evading blows.

Zetsu
Ring: 亥 ("boar")
Ring position: Right little finger
Partner: None
Zetsu functions as a spy for Akatsuki, a role made easier by his ability to merge with anything and instantly travel to a new location. He has been shown able to move his body and take part in the tailed beast sealing ritual simultaneously which, in addition to being unique to him, allows him to act as a lookout while the sealing takes place. Because of the role he plays, Zetsu is the only member of Akatsuki to act without a partner on a regular basis. Despite this, Zetsu serves as a sort of superior to other members, as they often report directly to him instead of the actual leader, Pain.
Zetsu's head appears to be enveloped in a large venus flytrap, which can also envelop the rest of his body. To further enhance his venus flytrap characteristics, Zetsu is cannibalistic, and as such he is sent to devour the bodies Akatsuki does not want found. This, in addition to his other roles, gives him the function as Akatsuki's hunter-nin, something that is further exercised when he is sent to retrieve the rings of dead Akatsuki members. The right side of Zetsu's body and face is black in color while his left side is white. To go with this, Zetsu seems to have a split personality, as the black half of his face speaks only in Katakana while the white side uses Kanji and Kana. The two halves also seem to converse with each other, and occasionally differ in opinion.

Former members

Deidara
Ring: 青 (“blue”, “green”)
Ring position: Right index finger
Partner: Formerly Tobi, Sasori before that
Deidara is a missing-nin from Iwagakure Before joining Akatsuki, Deidara acted as a terrorist bomber for hire, where his work attracted the attention of Pain. Pain sent other Akatsuki members to recruit Deidara, though he refused. After being defeated by Itachi however, Deidara was forced to join the organization. Deidara maintained a deep loathing for Itachi from that point further and became determined to defeat him, even training one of his eyes to overcome Itachi's signature ability: genjutsu. Deidara was partnered with Sasori upon joining the organization, whose artistic ability and insight Deidara admired. After Sasori's death Deidara is paired with Tobi whom he treats as a disciple. Despite Tobi's habit of accidentally angering Deidara, Deidara takes great care to keep Tobi out of harm's way and even dedicates his final moments to apologizing to him.
In battle, Deidara uses special mouths in the palm of each hand to create Exploding Clay (Kibaku Nendo), chakra-infused clay that explodes on command. He commonly uses the command “Katsu” ("scold") to trigger it. The blast strength of his creations is determined by how much chakra he adds to them. His clay can take on any size or form, ranging from microscopic in size to copies of himself as tall as a skyscraper. Deidara refers to his creations as art, believing the most beautiful thing about them to be their detonation. His admiration for his art is such that he believes it can't be defeated, leading to overconfidence in battle. Depending on the complexity or potency of one of his works, Deidara applies it a designation from anywhere between "C1" to "C4", the former being the most basic and the latter being his strongest and most complex attack. For his final act, Deidara also has a mouth on his chest that, once provided with clay, turns him into a living bomb that destroys everything in a 10 kilometer radius. Deidara uses this as a last resort during his battle with Sasuke, Itachi's younger brother, in an effort to prove his art is supreme, though Sasuke is able to survive.

Hidan
Ring: 三 ("three")
Ring position: Left index finger
Partner: Formerly Kakuzu
Hidan is the foul-mouthed partner of Kakuzu and is the second newest member of Akatsuki at the time of his expulsion. Hidan belongs to the Jashin ("evil god") religion, a religion that worships a deity of the same name and where anything less than utter destruction is considered a sin. Before battles start Hidan prays to Jashin and asks for nothing short of a kill or, when he is not allowed to kill his opponents, for forgiveness. After battles, should he have time, Hidan performs a thirty-minute ritual in accordance with his religion that culminates by stabbing himself in the chest and lying upon the ground. In addition to his religion Hidan has been gifted with immortality, and as such he is able to survive fatal injuries, such as decapitation. Despite this, Hidan needs to be connected to his body in order to control it. Kakuzu assists him in these instances by reattaching his limbs, allowing the wounds to heal with time. Hidan's inability to die is also used to Kakuzu's advantage, as he can attack Hidan all he wants without worrying about finding a new partner afterwards. Although the two dislike working together, this advantage makes them the ideal team.
During battle Hidan makes every attempt to acquire an opponent's blood where, upon consuming it, he draws a symbol on the ground that "links" him with his opponent. Once this link is created Hidan takes on a grim reaper-like appearance and becomes what is essentially a Voodoo doll for his opponent; any damage that is done to Hidan is also done to them. Hidan first uses this ability to give himself nonfatal injuries that bring him pleasure due to the pain it causes to him and the opponent. Once he is done toying with opponents in this way he stabs himself in the heart, killing them. Links can be broken prematurely if Hidan is removed from the safety of his symbol, though it can easily be reestablished by simply reentering its borders. After Hidan uses this ability to kill Asuma, Shikamaru faces him in an attempt to gain revenge. Hidan is unable to form a link with Shikamaru and eventually falls into one of Shikamaru's traps. With Hidan captured, Shikamaru blows him up and buries the still-speaking remains under a pile of rubble. While his actual status is currently unknown, Akatsuki no longer considers him a member.

Kakuzu
Ring: 北 ("north")
Ring position: Left middle finger
Partner: Formerly Hidan
Kakuzu is a missig-nin from Takigakure and Hidan's partner. He is a greedy individual, prioritizing things in terms of how much they are worth and finding money to be the only thing that he can depend on. Kakuzu's favorite source of income is collecting bounties, and he has even memorized the worth and information on some of the more dangerous targets. Due to this view of money, Kakuzu refers to himself as the "Treasurer of Akatsuki", though it is unknown if this is an actual position. Despite finding Akatsuki to be a good source of income, Kakuzu greatly dislikes the fact that he needs a teammate, due in part to his habit of killing anyone near him (partners included) when enraged. Having killed all of his previous partners as a result of this, Kakuzu was partnered with Hidan. Although neither enjoys being paired together, Hidan's immortality makes him the ideal teammate for Kakuzu.
Kakuzu's body is composed of a great deal of thick black threads that he can use to detach his limbs for long-range assaults. The threads themselves are also capable of piercing flesh, which Kakuzu uses to remove the still-living organs from his enemies. Once he has done so, Kakuzu can integrate these younger, healthier organs into his body that, in theory, allow him to extend his life indefinitely. Kakuzu most prominently uses hearts in this way, keeping up to four extra hearts with him at any given time. He keeps these spare hearts stored within animal masks sewn to his back, and each of the masks can separate from his body and attack independently. Once removed from his body, the masks can shoot powerful elemental blasts at opponents. If the heart in Kakuzu's body is destroyed, one of the masks can remerge with him so that he can take use of its heart, causing the mask to crumble away. Kakuzu also has an earth-based defensive technique that makes him virtually immune to physical attacks. Kakuzu's masks are slowly destroyed at the hands of a group of Leaf ninja; Naruto is able to destroy two of his hearts simultaneously and bring a third to the brink of failure. Although Kakuzu survives Naruto's attack, he is left unable to move, allowing him to easily be finished off by Kakashi

Sasori
Ring: 玉 ("jewel", "ball", also the king in shogi)
Ring position: Left thumb
Partner: Formerly Deidara, Orochimaru before that
Sasori is a missing-nin from Sunagakure. After the death of his parents, Sasori was left in the care of his grandmother, Chiyo, who taught him all she knew about using puppets in battle. With his newfound knowledge he created puppets in his parents' likeness so that he could feel their love. Since they were only emotionless puppets, his attempt failed, and he left them behind upon leaving the village. Once joining Akatsuki he was paired with Orochimaru and after Orochimaru's betrayal Sasori took it upon himself to track his movements and plot his destruction. Sasori would come to form a better working relationship with Deidara, as seen by Deidara's admiration of Sasori's abilities. Although the two have differing views of art (Deidara preferring works that depart quickly and Sasori favoring long-lasting pieces), Deidara considers Sasori to be his master until the very end, even though Sasori never appreciated his ideals.
Sasori specializes in creating puppets out of the dead bodies of humans, which is done by removing its entrails and preserving it to prevent decomposition. Sasori is commonly seen with Hiruko, a puppet he wears like a suit so often that many characters can only recognize him while he is wearing it. For battle purposes he favors the puppet of the Third Kazekage, the leader of Sunagakure whom he killed prior to his defection. Because the Third was once a living person, the Third's unique abilities remain intact and Sasori can utilize them at his leisure. His most versatile human puppet, however, is himself, as he has long since converted his body into one. In addition to giving him an unnaturally young appearance, Sasori's puppet body allows him to control hundreds of puppets at once. Since he needs part of his original body to control puppets Sasori has preserved his heart in a cylinder-shaped device that he wears upon his chest. Sasori is able to survive any kind of attack so long as his heart remains undamaged, and he can even use it to switch to new bodies by simply placing the cylinder onto a new puppet. Every weapon that his puppets wield is also laced with a poison of Sasori's own design; the poison instantly numbs the body and kills the target after three days. Despite his large arsenal of weapons, Sasori is defeated after a prolonged battle with his grandmother and Sakura. Sakura, in awe informs Grandma Chiyo they had done it but Chiyo confesses, that it had not been her to defeat Sasori but Sasori himself. Sakura is stunned but after a period of time, appears to understand.

eek that's a lot of info but I think I read it in wikipedia or something.

I cheated and got it from Wiki. 4laugh