Hidan

was the partner of Kakuzu, despite having mutual dislike for each other, and was the second newest member of Akatsuki, at the time of his introduction. Kisame laughingly referred to Hidan and Kakuzu as the "Zombie Brothers".

Background
Hidan hailed from Yugakure. After it deteriorated from a shinobi village to a tourist site, Hidan became infuriated with how things were turning out. He believed that the shinobi that resided there were meant to kill, and thus slaughtered his neighbors before leaving Yugakure, and joining the cult-like faith known as Jashin, a religion that worshiped a deity of the same name. The primary teaching of this faith appears to be outright slaughter, where anything less than utter destruction is considered a sin. The amulet around his neck was a symbol of Jashin, and he used it to pray to his god before battling, requesting a good kill, or (when he was not allowed to) for forgiveness. Eventually, he joined Akatsuki after seeing Kakuzu, a man who he saw as a pioneer in immortality, and he was later partnered with him.

Appearance
Hidan has medium length silver hair slicked back with distinctive pinkish-purple eyes. He wears his Akatsuki cloak open with no shirt, only pants under it revealing his Yugakure forehead protector around his neck and Jashin amulet. He wears dark green nail polish and his Akatsuki ring on his left index finger, which bears the kanji for. He is always seen with his Triple-Bladed Scythe on his back. His left ear also appears to be torn or cut after his fight with Asuma. Also, after his battle against Asuma's unit, he did not replace his torn Akatsuki robes.

Personality
Hidan was one of the most foul-mouthed, disrespectful characters in the series; he frequently swore and complained at allies and opponents alike, contrary to being a "religious" person. He rarely used honorifics when speaking, and, even then, usually as a form of sarcasm, for example when he called Deidara "Deidara-chan". He was the only member of Akatsuki who did not respect their leader, Pain, and openly declared his willingness to kill him around others. The only respect he ever seemed to give was to his god, and, even then, he was quite willing to use his name as an insult. He openly held his partner, Kakuzu, in contempt for his habit of blasphemy, love of money, and Kakuzu's frequent ridicule of Hidan's religion and battle style. Despite this, whenever Hidan was in the mood to kill, the two worked together flawlessly in battle, and one can infer that he did care somewhat for his partner, from his panicked reaction when he almost killed Kakuzu while being possessed by Shikamaru's technique.

Hidan had absolutely no moral restraints regarding the people he killed; he considered slaughter a religious calling, and often took considerable pleasure in making his opponents' deaths as painful as possible. Given the requirements of his voodoo-like curse ritual, he was quite willing to inflict pain and injuries on himself, and openly relished the shared pain between him and the cursed victim. Despite this, he reacted "normally" (that is, he didn't enjoy the pain) to being injured by someone else, or when the opponent didn't share the pain.

Hidan's behavior in the anime bordered on insanity; he was frequently heard shrieking loudly while attacking, and laughed maniacally when he was about to kill Asuma Sarutobi. Hidan also appeared to be quite spiteful towards his enemies (and nearly everyone else), even commenting to Shikamaru Nara that "I've been waiting for this" ("this" referring to using his ceremony to kill Shikamaru).

However, his immortality had made him arrogant, and he frequently engaged opponents with no regard for strategy, save to acquire some of their blood. Although ridiculed for his foolishness by Kakuzu and Shikamaru alike, and being obviously inferior in tactical genius to either of them, he was able to analyze the nature and limits of Shikamaru's Shadow Imitation Technique, and conducted battle accordingly (though he retained his arrogant attitude even under these circumstances). Interestingly, he seemed to panic when Shikamaru took control of his body, shouting at Kakuzu to do something in a rather frantic voice. He didn't particularly like it when Kakuzu assisted in his battles, and only called for his help when he decided he needed it. Kakuzu tended to return the favor by coming in "late" and letting Hidan be beheaded (though still alive) as punishment for underestimating his opponents. After his head was reattached he showed a great hatred towards Asuma.

Immortality
Hidan's main advantage was his inability to die, a result of extensive experimenting with the Jashin religion's various jutsu. His immortality allowed him to survive numerous fatal injuries, and almost any form of dismemberment; he even retained his ability to speak after having his head cut off. However, his head still needed to be connected to his body in order to control it, so Kakuzu reattached it, and other body parts, when needed. Despite Shikamaru's attempt to blow him into smithereens using hundreds of paper bombs adhered to his entire body, the former only succeeded in decapitating him (after weakening the tendons that Kakuzu used to re-attach his head) with the full impact of the explosion. Even though he was impervious to most physical attacks, as well as survive the injuries that actually got through to him, he was still susceptible to pain, which he came to find pleasure in at the expense of his opponents.

This inability to die was the primary reason for his partnership with Kakuzu. Since Kakuzu couldn't kill him, Kakuzu didn't need to find new partners after his fits of rage. Although the two disliked working together, this advantage made them the ideal team. His immortality was exploited in mutual advantage by Kakuzu, where the pair would perform a combo involving one of Kakuzu's hearts using a wind release jutsu in unison with Hidan striking at an opponent. Such an attack would maim the victim but leave Hidan unimpaired. Despite being "immortal", he is still capable of dying from a lack of nutrients.

Triple-Bladed Scythe and Fighting Prowess
In battle, Hidan wielded a large crimson triple-bladed scythe, that he used as a multi-purpose attack. He wielded it as a short and long-range weapon. Despite its large and dangerous shape, Shikamaru speculated it was intended to draw blood, instead of doing damage. He controlled it with a long cable, that was connected to a coil hidden under his robe. He was exceptionally skilled at wielding it, capable of deflecting a swarm of shuriken thrown at close range. He has also demonstrated tremendous aim and control of where and how it will strike, making it highly difficult for his opponents to predict the weapon's path. The unusual curvilinear trajectory that it took made it even more unpredictable, and Hidan was shown to be capable of causing the scythe to swerve perpendicularly and unexpectedly at a target even though the scythe was quite far from him. However, during his final battle against Kakashi and Team Asuma, the cable was destroyed by a paperbomb attached to a kunai thrown by Shikamaru. Hidan stated that the large size inhibited his attack speed, claiming he was the slowest attacker in Akatsuki. Nevertheless, Hidan was extremely agile, having tremendous acrobatic prowess and dexterity in avoiding attacks. He was shown to be capable of dodging a chakra blade aimed at him in mid-air, by thrusting his scythe into the trunk of a tree and using it as a stand, halting his fall and making the blade miss by a margin.

Jashin Ritual and Curse
Using a weapon, Hidan made every attempt to acquire an opponent's blood, where upon consuming it he drew the Jashin symbol on the ground. This process somehow "linked" his body with his opponent's. Once this link was established, Hidan took on a Grim Reaper-like appearance, with black skin and white bone-like markings. In this state, he was essentially a living voodoo doll for his opponent; any damage that was done to him was also inflicted on the opponent. Hidan referred to this as his "curse", and he was fond of toying with his victims by inflicting non-fatal injuries with his retractable spike, while taking obvious pleasure in their shared pain. Once he was done toying with the opponent, or if he wanted to kill them quickly, he impaled himself through the heart, killing them and relishing in intense satisfaction.

Despite its effectiveness, the curse had many requirements, and could be a slow technique to employ. The curse could be avoided if the opponent happened to know what to look out for, and knew of Hidan's inability to die. The link between Hidan's curse and his opponent could be broken prematurely if Hidan was removed from the symbol; however, Hidan would remain in his transformed state, allowing the curse to be easily re-established by him simply entering the symbol's borders once more.

Hidan and Kakuzu Arc
Hidan and Kakuzu made their first actual appearance after cornering Yugito Nii, the jinchūriki of the Two-Tailed Monster Cat, in the sewers of Kumogakure. Initially, Hidan offered Yugito the option of surrender, claiming his faith did not allow him to fight an opponent only to leave them half-dead (for the capture of her Tailed Beast). Yugito refused his offer, and transformed herself into the Two-Tails, but the Akatsuki duo still managed to defeat her, and gave her body to Zetsu, before they continued to the Land of Fire.

Upon arrival in the Land of Fire, Hidan begrudgingly joined Kakuzu in attacking a temple, so that they could collect the bounty on the head monk, Chiriku. The monk and his numerous subordinates were defeated and slaughtered, and Hidan repeated his lengthy ritual. Afterward, Hidan reluctantly traveled with Kakuzu to take the monk's body to the nearest bounty station.

Reaching the bounty station, Hidan opted to stay outside, not liking the fact that the station was hidden inside a lavatory that smelled particularly foul. While he waited for Kakuzu to collect the money, Hidan was ambushed by Asuma Sarutobi, Shikamaru Nara, Kotetsu Hagane, and Izumo Kamizuki. Despite being immobilized, and stabbed in the chest by two large kunai, Hidan asked who the shinobi were, much to the Konoha group's surprise.

Kakuzu soon arrived, forcing Hidan's assailants to fall back. Instructing Kakuzu to leave the battle to him, Hidan exchanged blows with Asuma, eventually succeeding in obtaining some blood and initiating his curse, right before Asuma used Fire Release: Ash Pile Burning on him, causing Asuma to suffer from third degree burns. Not realizing what Hidan had done, Asuma charged, and fell over in pain when Hidan stabbed himself in the leg. As Hidan prepared to kill Asuma, Shikamaru, realizing what was going on, again immobilized Hidan, but had difficulty maintaining his hold. While Hidan was momentarily restrained, Shikamaru analyzed everything Hidan had said and done up to that point, eventually figuring out the weakness of Hidan's technique. With that epiphany, Shikamaru managed to force Hidan from the safety of his symbol, temporarily releasing Asuma from Hidan's curse.

Now freed from Hidan's curse, Asuma decapitated Hidan. To the Leaf ninjas' horror, Hidan's severed head loudly cursed and swore at Asuma for doing so, and then at Kakuzu for not stopping them. Kakuzu casually shrugged this off, as he felt it was Hidan's fault for telling him to not interfere. While Asuma and the others stood shocked by Hidan's survival, Kakuzu reattached Hidan's head to his body, again surprising the Konoha ninja. As Kakuzu dealt with Kotetsu and Izumo, Hidan re-entered his symbol, and linked himself once more to Asuma. Hidan swung his scythe at Asuma, only for Asuma to duck and the scythe to bury itself into Hidan's own vital organs. Asuma doubled over with pain, and as Shikamaru rushed to Asuma's aid, Hidan used the opportunity to stab himself through the heart with his pike, which fatally injured Asuma. Asuma coughed up blood, and collapsed, as Hidan smiled enjoyably, with Izumo, Kotetsu and Shikamaru watching in sorrow and horror. Shikamaru loudly swore at Hidan, and charged at him, but collapsed from exhaustion.

Reinforcements from Konoha arrived as Shikamaru collapsed. Although Hidan expressed interest in getting to kill them as well, the Akatsuki leader called him and Kakuzu away. Angry, and promising to kill the Konoha ninja later, Hidan left with Kakuzu to a secluded area, where they spent three days sealing the Two-Tails (and, in the manga, another three days sealing the Three-Tailed Giant Turtle).

Once the sealing was over, Hidan and Kakuzu headed for Konoha, eager to continue their battle. Along the way, the two were once again ambushed by Shikamaru, the latter having waited for them, this time accompanied by the other remaining members of Team 10. Although Kakuzu managed to escape from Shikamaru's shadow, Hidan was left under Shikamaru's control, and was forced to fight his partner.

When Kakuzu was apparently killed by Kakashi Hatake, Kakashi prepared to finish Hidan as well, but was quickly repelled by a surprisingly alive Kakuzu. Freed from Shikamaru's shadow, due to its inherent time limit, Hidan charged at Kakashi, while Kakuzu fired blasts of elemental attacks at the duo's opponents. Recognizing that the two-man Akatsuki team was too powerful as a pair, and needed to be separated, Shikamaru volunteered to draw the immortal away. Hidan, having been trapped by Shikamaru's technique so many times, was determined not to fall prey to it again, and made sure to avoid the shadows. In doing so, Hidan mocked Shikamaru for fighting in a sneaky and distant manner. While focusing on the shadow attacks, Hidan didn't notice Shikamaru suddenly appearing close enough to stun him with a punch to the face. Hidan blocked this with his hand, connecting their shadows and as a result, he was trapped by Shikamaru's shadow, and was led away by him.

Hidan was led towards an area that was surrounded with wire and exploding tags, which Shikamaru had prepared in advance. However, Hidan had no desire to escape, and he attacked Shikamaru when the shadow jutsu wore off. It appeared as though he had acquired some of Shikamaru's blood. Quickly drawing his symbol and transforming, Hidan seemingly killed Shikamaru. Once Hidan departed, the "fallen" Shikamaru jumped up, still alive, and tried to decapitate Hidan from behind, although failing to make a cut deep enough. Surprised that Shikamaru was alive, Hidan learned he had been tricked into consuming Kakuzu's blood, so he, in effect, destroyed one of Kakuzu's hearts.

As Hidan attempted to kill Shikamaru in retaliation, Hidan was again stopped by Shikamaru's shadow. With Hidan restrained, Shikamaru covered Hidan with the surrounding exploding tags, tying Hidan to the spot. With Hidan unable to move, Shikamaru activated a prepared mark to cause the ground beneath Hidan to break away. He then informed Hidan that the land that they were on belonged to his clan, and that they would ensure that Hidan remained bound to it for eternity. Finally, having a chance to avenge Asuma's death, Shikamaru lit a cigarette (in the anime, it was changed to Asuma's lighter) and tossed it at Hidan, causing the exploding tags to detonate. Hidan was literally blown to bits. As Hidan's remains fell into the pit below, his detached head promised to kill Shikamaru in any way possible. Shikamaru caused the pit to collapse, trapping the screaming Hidan beneath the rubble. He was buried in a place Akatsuki can never reach and thus he is no longer considered a member. He is currently dying slowly from a lack of nutrition.

Creation
In Naruto Hiden: Sha no Sho Character Official Data Book, Kishimoto revealed that Hidan's design, with the skeletal patterns and scythe, were meant to resemble a, because "Hidan uses curses and things." He also noted that he originally planned for the scythe to have a number of special tricks, but "didn't have time to show them all."

Trivia

 * The first kanji in Hidan's name (飛) stands for hisha, the rook in Shogi.
 * Both Hidan and Kakuzu made their first video game debuts in Naruto Shippūden: Gekitou Ninja Taisen EX 3. They are also playable in Naruto Shippūden: Ultimate Ninja Heroes 3 and Naruto Shippūden: Clash of Ninja Revolution 3.
 * Hidan is the only known character in the series to hail from Yugakure.
 * It should be noted that when traveling, in the manga and the anime, that neither Hidan nor Kakuzu wore the traditional Akatsuki Kasa (hat). They share this trait with Pain, Konan, and Zetsu.
 * Hidan's Jashin amulet appears with the point of the triangle pointing upwards in the manga, and pointing down in the anime, but on episode 75, minute 19:05, it appears pointing upwards.
 * Before his debut in the manga, a character with no clear similarities to Hidan appears during Akatsuki meetings. It is unknown if this is one of Kakuzu's previous partners or simply an early design for Hidan.
 * Both Hidan's and Kakuzu's faces were on a pair of lanterns in Shippuden episode 129, Hidan being to the left and Kakuzu being to the right.
 * In the second Naruto fanbook, Masashi Kishimoto confirms that Hidan is still alive. However, he is dying a slow death due to lack of nutrition.
 * According to the databook:
 * Hidan's hobby is being an active Jashinist.
 * Hidan's favorite food is spare ribs. His least favorite are any kind of vegetable.
 * Hidan's favorite word is "Jashinist".

Quotes

 * "Now! Let's savor the utmost of suffering together!"
 * (To Kakuzu) "Tsk! Right after the verbal abuse. Man, Kakuzu, you really stink!"
 * (After using his curse to fatally wound Asuma) "Oh yeah, that hit the spot."
 * "As the other dies, their agony radiates through my body, and living through it is pure ecstasy!"
 * (To Shikamaru) "Does your village bury their dead? 'Cause it's gonna be a pain digging him up."
 * (To Shikamaru before being buried) "Don't forget what I said! My teeth are enough to take you on! Someday, I will find you and bite your throat out!