Ōnoki

is the of Iwagakure. He is renowned as.

Background
As a young man, Ōnoki was a student to the Second Tsuchikage, Mū who taught him how to use the Dust Release techniques. Later in life, he himself would become teacher to Deidara. Though he often implied that Deidara's ideologies and fighting style annoyed him, he was still proud of him. At some time in the past, Ōnoki fought with Madara Uchiha, the only living Kage to do so. His knowledge of Madara's power made him wary of him, and was thus surprised that the latter would choose to carry out his designs behind the shadows through Akatsuki. Probably unaware of Madara's major role as Akatsuki's founder, he hired the former mercenary group many times for their services in the past, which he rationalised by his concern over Kumogakure's unwavering militarisation. He has also apparently known and dealt with A, the Fourth Raikage, since the latter was young.

Appearance
Ōnoki is an old man with a triangular beard and a moustache with angular corners. He has a big red nose and thick rectangular-shaped eyebrows. The top of his head is completely bald, although, he has some white hair at the back and sides of his head which faintly resemble a chonmage style hair cut, the back of which is tied with a yellow ribbon into a topknot. Ōnoki wears a green and yellow coat with a red collar. Underneath he wears an Iwagakure flak jacket.

Personality
Ōnoki is very proud but appears frail, with constant complaints referring to his hips and back. He also refuses to retire and choose a successor as Tsuchikage despite his frailty, insisting that he is still strong enough to continue to rule the village. Kurotsuchi describes him as a "stubborn old man". His pride has him give very little respect for those younger than him, as he verbally attacked Gaara (a Kazekage who is many years younger) on numerous occasions, dismissing his presumed naivety on dealing with politics. However, later on, it has been shown that Ōnoki has gained great respect for Gaara's skill and power as a Kage, even in spite of his young age.

Deidara also noted that Ōnoki hates art, possibly because he ridiculed his Exploding Clay artwork. During the chaos Sasuke Uchiha had started, Ōnoki didn't seem to be alarmed once the battle in the Summit Room began. He appeared to be calm, enough to let Mei Terumī deal with the current situation. Upon observing the fight between the two, he seemed quite entertained, which led him to join the riot.

Ōnoki seems to be quite ruthless, taking down a heavily-injured Sasuke who had just been saved yet again after facing the wrath of three other Kage before him, on the claim that the Ninja World wants Sasuke dead even though Ōnoki himself has no grudge against Sasuke personally. He then immediately turned his attention to a devastated Karin, claiming that she's next to die. He does, however, seem to be considerate enough to let Madara speak for his actions, reasoning with the Raikage to listen to his reasons before making their own. According to his thinking of strategy, Ōnoki might be the type of person who takes risks.

A similarity can be shown with Tsunade, as she has a habit of gambling and taking risks often. Remembering what Gaara said to him, he states to Akatsuchi and Kurotsuchi that he remembered what he really used to be before he became a stubborn old man, likely meaning he had a more kind and friendly heart in his youth.

Abilities
Ōnoki is a powerful and capable Tsuchikage. He is physically frail and as such isn't suited for taijutsu in his old age. He is nevertheless strong enough to guide the Island Turtle through the sky, although he did complain about his back later. He has a great deal of experience, having fought Madara Uchiha and survived, thus his knowledge is invaluable to the Allied Shinobi Forces.

Ōnoki is able to fly, an ability he can transfer to others. He can fly at very high speeds even in his old age.

Nature Transformation
Ōnoki possesses the ability to use the kekkei tōta known as Dust Release, by combining three elements, such as Earth, Wind, and Fire. He is the second shinobi in existence with this ability. Ōnoki's dust release ninjutsu allow him to pulverise his enemies to molecule-sized dust. His techniques can be so destructive that they reputably are capable of destroying an entire island. His earth ninjutsu are particularly powerful, and can turn targets into stone by mere touch as well as create multiple rock clones for assistance in battle.

Five Kage Summit Arc
When Ōnoki set out for the Kage summit, the villagers of Iwagakure encouraged him to show the other Kage how strong he was, though his bodyguards Akatsuchi and Kurotsuchi were less enthusiastic. He ended up hurting his hips, and had to be carried to the meeting. When they arrived in the Land of Iron, Ōnoki explained to Akatsuchi about the samurai.

When the Summit began, Ōnoki expressed his concern that Akatsuki could capture the jinchūriki so easily, considering it an embarrassment. When the Fourth Raikage ridiculed him for employing Akatsuki in the past, Ōnoki defended Iwagakure's actions and instead blamed Kumogakure for increasing its armaments in times of peace. Mifune then suggested that the five Kage join forces against Akatsuki, and nominated Danzō as the group's leader. Ōnoki was outraged by the suggestion, but Mifune pointed out that he was too old and had made too much use of Akatsuki in the past to be trustworthy.

When the Kage were alerted to Sasuke Uchiha's presence and the Raikage went off to confront him, Ōnoki commented that he was still as reckless as an adult as when he was young. While waiting for the Raikage's return, he offered to give the Fifth Kazekage tips on how to be a good Kage, having previously dismissed Gaara's suggestions on the basis that he was too young. The Kazekage only asked why he has no faith.

Sasuke arrived at their location soon after, but Ōnoki chose to let the Fifth Mizukage deal with him. After Sasuke was on the verge of death due to the Mizukage's technique, Black Zetsu activated the Spore Technique causing several clones to start growing, draining the person's chakra that they had attached themselves to in the process. Ōnoki uses his Earth Release: Aggravated Rock Technique to petrify the clones who falls off him to the ground creating a huge crater.

Ōnoki then decided to intervene as it seemed that Mei was having some trouble. He attacked Sasuke with the Dust Release: Detachment of the Primitive World Technique. He then turned his sights to the devastated Karin. Although Ōnoki believed he had turned Sasuke to dust, Madara Uchiha appeared with Sasuke in tow. Madara sent Sasuke away and told the Kage of his Eye of the Moon Plan. Madara concluded by requesting that the two remaining jinchūriki be given to him. Ōnoki and the other Kage refused, beginning the Fourth Shinobi World War.

With war declared, Ōnoki, Gaara, Mifune, Mei, and the Raikage agreed to form a coalition against Madara and the Akatsuki. The group was mistrustful of the Hokage, so Ōnoki agreed to seek Konohagakure's assistance by approaching Kakashi Hatake. In terms of tactics for the forthcoming battles, Ōnoki suggested they use their two remaining jinchūriki to their advantage, but the other Kage disagreed, believing that would make them too easy to be captured.

After it was decided that the Raikage would lead the ninja alliance, he asked Ōnoki to reveal all the knowledge he had on Madara as he once fought him. When the meeting ended, Ōnoki surprised his men by not deciding to simply kill the jinchūriki. When asked why, he merely stated that it was because he remembered who he was "before he became a hard-headed old man", referring back to how Gaara talked down on him about "losing himself".

When he and his bodyguards return to Iwagakure, they are informed that the Earth Daimyō has approved of the alliance. While Akatsuchi comments on the immediate approval, Kurotsuchi insults her grandfather by comparing him to Madara age wise. He then commented on the ignorance of the young. However, Akatsuchi replies by recounting Gaara's words to him. Ōnoki later admits that he awaits to see what Gaara is capable of, having Gaara symbolise the youth of the shinobi world.

Confining the Jinchūriki Arc
To make preparations for the approaching conflict with Akatsuki, Ōnoki goes to Kumogakure to meet with the other heads of the Alliance. Because the Fifth Hokage is still recovering from an extended coma, Ōnoki suggests that she retire and give her position to someone younger. She accuses him of being a hypocrite. When the more serious issue of where to hide the jinchūriki is broached, the Hokage disagrees. Ōnoki uses the same arguments that swayed him to convince her that it's for the best.

When they learn that the jinchūriki's location on the Island Turtle has been discovered by Akatsuki, Ōnoki volunteers to go to the island to defend against any Akatsuki assaults. He breaks his hip again as he leaves, so Gaara suggest that he go instead. Ōnoki goes anyway, flying to the island with Akatsuchi and Kurotsuchi. As they near the island they spot Kabuto Yakushi and the resurrected Deidara riding a giant clay owl. Ōnoki attacks them, but finds that they are Clay Clones that soon detonate. As the Ōnoki that attacked them was one of Akatsuchi's Rock Clones, the real Ōnoki wastes no time in mocking Deidara for being killed by Sasuke.

Deidara and Kabuto retreat to the island but are pursued by Ōnoki. He prepares to attack them both with one of his dust techniques when he is stopped by Akatsuchi, who reminds him that any attack he makes is likely to destroy the island. Ōnoki draws Deidara away from the island so that they can find out if his dust is superior to Deidara's Explosion Release. A coffin appears and takes Deidara away before their battle can start. When Ōnoki returns to the island he learns that Kabuto escaped with Yamato as a captive. Fearing what Akatsuki may do now that they know where the island is, Ōnoki carries the island to the far coast of the Land of Lightning, complaining of the strain it puts on his back. When he returns to headquarters he is given the Allied forehead protector that was designed while he was gone.

Shinobi World War Arc
Ōnoki remains at headquarters with the Hokage and the Raikage, providing input when needed. When Gaara's Fourth Division reports coming into contact with a revived Mū, Ōnoki is sent to provide support, headquarters believing that only one dust-user can defeat another dust-user. Once he arrives at the Fourth Division's location, he tells Gaara that he has arrived to redeem himself, taking back his values he had disposed of long ago.

Once the sun rises on the second day of the war, Ōnoki tells Gaara that they can't retreat any further and that they should begin attacking the enemy with long-range techniques to see how they respond. Gaara attacks the Kage with giant wave of sand, but is stopped by the Fourth Kazekage. Gaara then uses his sand to hold the Kage in place for Ōnoki's attack, but Mū escapes counters his attack. Their Dust Release techniques collide and destroy the area. Ōnoki then remarks that Mū's strength had not waned at all. Ōnoki tells the Fourth Kazekage that Gaara is the Regimental Commander of the Allied Shinobi Force, and that all the Kage respect his power. This allows Mū to confirm that the shinobi have formed an alliance.

Mū then reminds Ōnoki that by taking full advantage of the post-war situation, the dominance of Iwagakure can be assured. Ōnoki tells him that he won't be doing that this time, which surprises Mū. The fighting resumes and Mū runs to avoid Gaara's technique, while Ōnoki pursues him. As the chase ensues, with both men seemingly clashing several times, Mū says to Ōnoki, who had become visibly tired that his age was catching up to him, and as he disappeared from view, to call Gaara before he died as well. However, telling Mū not to underestimate him just yet, he creates several clones.

As their battle ensues, Gaara arrives at the battle scene and tries to warn Ōnoki of Mū's attack from behind but is unsuccessful and Ōnoki seemingly throws his back out as a result. Mū prepares to attack them with his Dust Release technique. As Naruto attempts a surprise attack with his Planetary Rasengan technique which Mū dodges, Ōnoki recovers in time to tell him that Mū is a sensor. After some good teamwork between Gaara and Naruto who was able to hit Mū, Ōnoki moves swiftly and attacks him with his Earth Release: Aggravated Rock Technique that turns Mū's whole body to stone. As Mū is being sealed by Gaara with sand, he tells Ōnoki that for someone who detested other villages, he worked well with them to which Ōnoki stated that he had lived long enough like that and it was time for a change.

Trivia

 * The word is idiomatically used to refer to both sides of an argument or both of two possible alternatives. This may be why the Viz translation has Ōnoki calling himself, "…the great Fence-Sitter of Iwagakure!"

Quotes

 * (To the Fourth Raikage)
 * (To Kurotsuchi)
 * (To Danzō) "It takes time to make ideals a reality. If you're hasty, you'll lose sight of everything else and make mistakes… just like now."
 * (To Deidara) "Deidara… I trust you haven't forgotten… how terrifying I can be!"
 * (To Gaara) "I'm here to pick up the principles I tossed so long ago!"
 * (To Gaara) "I'm here to pick up the principles I tossed so long ago!"