Fū

was a kunoichi from Takigakure and the jinchūriki of the Seven-Tails. She was at some point captured by Akatsuki and had the Seven-Tails removed from her body, causing Fū's death.

Background
In the anime, two years before the Akatsuki began hunting down tailed beasts, tired of living a secluded lifestyle in Takigakure, Fū signed up for the upcoming Chūnin Exams being sponsored by Konoha and Sunagakure. While Shibuki was against this in fear of people learning about Fū's jinchūriki status, he ultimately gave in, hoping to use this event as an opportunity to help restore Takigakure's former glory. While Fū was delighted at this, Shibuki assigned Kegon and Yōrō to protect Fū by posing as her genin team-mates. Upon entering the Chūnin Exams, Fū and her team-mates are split up for the written test after randomly picking a number from one to three, Fū picking number two. The proctor, Shikamaru Nara, explained that the respective members of a team must score exactly 100 points combined to pass by having each member only answer one of three questions with different worth. Fū ends up using a technique to communicate with her team-mates, allowing them to tell each other which question they were going to pick.

After the three question choice test closed, Shikamaru revealed a bonus question. The bonus question asked the members of their teams which team-mate would leave to be a decoy, with the answer that members of each team picked having to be unanimous. The person picked would be disqualified. Her team passed by not answering the question, which was the correct answer, as it is revealed that all members of a team must be present to be qualified for the second round. Because of the many participants, a preliminary round had to be held. The preliminary round involved a race to Sunagakure, with the first 30 participants qualifying for the primary second round. Her team was the first to dash off into the race.

Personality
Akatsuki member Deidara indicated that Fū possibly despised humanity due to being neglected and hated by her village as a result of her status as a jinchūriki. However, when seen with the other jinchūriki and tailed beasts, she appeared to be rather cheerful with a happy-go-lucky and somewhat carefree disposition; smiling as she recalled Son Gokū and Rōshi's final moments before being sealed. She also uses at the end of her sentences — which is more commonly used by boys, giving her somewhat of a tomboyish demeanour. In the anime, Fū is shown to be somewhat of a trouble maker, when she was summoned by Shibuki she thought she would be scolded for something that she did. Fū also appears to be easily bored.

Appearance
Fū wore an orange clip in her short, spiky mint green hair that matched her eye colour, which was also orange. Her ninja outfit consisted of a short sleeveless white midriff shirt with fishnet armour underneath, long white armlets, and fishnet shorts with a short white apron skirt over it. Her forehead protector was worn on her right arm. Fū also carried a cylindrical object in red wrapping on her back, the purpose of which is unknown. After becoming part of Tobi's Six Paths of Pain, Fū eyes appear identical to his Sharingan and Rinnegan, except for her right eye that has the usual black sclerae like other reincarnated shinobi that Kabuto summoned.

Abilities
Fū can exhale a sparkling substance from her mouth that shines so brightly that it blinds her targets, creating an opening for herself, or her allies to attack. After her reincarnation and serving as one of Tobi's Six Paths of Pain, Fū is seen with both the Sharingan and Rinnegan. Combining the perceptual and predictive abilities of the former with the shared field of vision ability of the latter, allowed Fū to use her attacks in a more precise and coordinated fashion as well as react well to enemy attacks more efficiently, both individually and in conjunction and with the other jinchūriki. In the anime, Fū is capable of using a Wave Transmission Technique, which allows her to communicate with her allies silently and at long range, with the technique making a howling wind-like sound.

Jinchūriki Transformations
As Chōmei's jinchūriki, Fū is granted a significant amount of chakra and stamina from the beast. In the anime, Shino Aburame noted that Fū's chakra signature is similar to a bug-style ninjutsu. The full extent of her control is unknown, but she could form at least two of the beast's tails upon her reincarnation, which Fū used as wings to fly. She has been demonstrated to be very nimble whilst in flight, being capable of outmanoeuvring several of Killer B's attacks using Samehada and his other swords. When she was immobilised by B's clone she changes into her 'Version 2' form and attacks Naruto. She is able to bite her opponents in this mode.

Fourth Shinobi World War: Confrontation
In preparation for the Fourth Shinobi World War, Fū was reincarnated by Kabuto Yakushi to fight against the Allied Shinobi Forces, before being mobilised alongside the other deceased jinchūriki. As dawn broke on the second day of the war, it was revealed that Tobi had turned the reincarnated jinchūriki into his own customised Six Paths of Pain, with each having a Rinnegan and Sharingan in place of their left and right eyes respectively. Each jinchūriki also had their particular tailed beast resealed within them and a chakra receiver embedded into their body.

Fourth Shinobi World War: Climax
Fū later travelled together with Tobi, in pursuit of Naruto Uzumaki and Killer B. Encountering their targets, the reincarnated jinchūriki were sent into battle. After the enemy evaded Utakata's attack, Fū attempted to obscure their vision with her Hiden: Hiding in Scale Powder Technique, concealing Yugito Nii and Han's ambush. However, when this assault failed, she, like the others, unleashed the power of their respective tailed beast by materialising two of its tails. Using these tails, which doubled as wings, she confronted B directly. Dodging his initial attacks with Samehada, Fū continued to narrowly evade both of B's swords, despite them being thrown from behind her. This feat was achieved thanks to her share field of vision with the other Six Paths of Pain and Tobi, due to the Rinnegan.

Incapacitated in the wake of the Eight-Tails' devastating attack, after B's recent transformation, Fū was then restrained by the latter's sealing technique. However, before the sealing's completion, she manages to escape by adopting her Version 2 form, where she then proceeds to attack Naruto using her Bug Bite technique. Regrouping with the other reincarnated jinchūriki, after Kakashi Hatake and Might Guy's intervention, Fū charges towards Naruto but is instead intercepted by Guy's powerful blow. Rallying once again, she along with the other jinchūriki prepare to confront the two Konohagakure jōnin, after Han's previous attack is thwarted by Kakashi.

After Son Gokū is resealed into the Demonic Statue of the Outer Path, Fū is forced to enter her full Seven-Tails form, as Tobi prepares to go all-out. Unleashing a Tailed Beast Ball along with the others, the jinchūriki instead resort to a direct assault when these attacks are deflected by Naruto, only to then be repelled as the latter adopts his Tailed Beast Mode. In the resulting chaos, Fū was grabbed mid-flight by the Nine-Tails and sent plummeting to the ground, narrowly missing Isobu. With this, the rival beasts regroup and prepare a collaborative Tailed Beast Ball, launching it towards their opponents only for it to be diverted by an opposing one.

When Naruto attempted to remove the opposition's chakra receivers in the ensuing blast, Naruto entered the joint consciousness of the tailed beasts, where he met Fū along with the other jinchūriki and their respective beasts. During this encounter, she happily recounted Son Gokū and Rōshi's final moments, before introducing herself to Naruto alongside her beast, Chōmei.

With the release of the Impure World Reincarnation, Fū and the others were enveloped in a light of sorts before their bodies started to deconstruct and her soul returned to the afterlife.

Trivia

 * Masashi Kishimoto initially stated that he wasn't completely sure yet about the gender of this jinchūriki. Based on the concept art of Fū in Road to Ninja: Naruto the Movie, it would appear that Kishimoto has decided that Fū is a girl.
 * Fū can mean or.
 * 'Fū' is also the Japanese name for the.
 * Fū is the only known recent jinchūriki that does not come from one of the Five Great Shinobi Countries.
 * Fū was possibly one of the jinchūriki that were captured before Gaara.
 * Fū's skin colour is slightly darker in the anime than in the manga.
 * In order to prevent the jinchūriki from turning traitor, it is tradition for the host to be selected from the family of the village's own Kage. However, Takigakure does not have a Kage, just a village leader. Due to this, Fū may have been connected to one of the village leaders.