Kinkaku

was the older of Kumogakure's Gold and Silver Brothers.

Background
The Gold and Silver Brothers were the most reviled criminals in the history of Kumogakure. Once, they were assigned to capture the Nine-Tailed Demon Fox, but were swallowed whole. However, they survived, and thrashed inside the tailed beast's stomach for two weeks, eventually forcing the Nine-Tails to regurgitate them. When in its stomach, they survived by eating the flesh of the beast. A portion of the Nine-Tails' chakra remained within them, giving them a large chakra reservoir, allowing them to use four of the five ultimate treasures of the Sage of the Six Paths without dying from the large chakra consumption. During the peace ceremony between the Second Hokage and the Second Raikage, the two brothers staged a coup d'etat that left the Hokage on the brink of death. They, as part of the Kinkaku Force, would later be responsible for the former's death during the First Shinobi World War. Sometime in his life, he met Kakuzu.

Appearance
Kinkaku was a burly shinobi, with a muscular build and towering stature. He seemingly possessed long and light-coloured hair with prominent dark tips, arranged in a style reminiscent of a Native American headdress. These features are accentuated by the presence of two distinctive horns that emerge from the abundant hair on his head as well as a light-coloured rectangular marking on his nose. Unusually, he had the same characteristic whisker-like marks on his face as Naruto Uzumaki. This is due to the fact that during his lifetime he and his brother attempted to seize the Nine-Tails and were swallowed instead. They survived for two weeks in the beast's stomach, eating the Nine Tails stomach meat, until it spat them out.

His typical attire was comprised from the standard Kumogakure Flak Jacket, worn over a high collared sleeveless uniform, and a pair of simple wrist-guards. The kanji for is tattooed upon the shoulder of his exposed left arm.

Personality
Kinkaku was, like his brother, considered to be a disgrace to Kumogakure due to their belief of deceit and betrayal being battle strategies. Despite this, he is considered to be a loving brother, showing great fury when Ginkaku was sucked into the Benihisago by Darui.

Abilities
Kinkaku and his brother were well known for their strength during their lifetime, so much so that one Kumogakure shinobi trembled in fear when he saw them and provoked the Fourth Raikage enough into almost disregarding his duties as leader of the Allied Shinobi Forces to personally confront the pair. According to Ao, the brothers both possess enormous chakra reserves with traces of the Nine-Tails' chakra mixed in due to being swallowed and regurgitated by the Nine-Tails after surviving two weeks inside its belly.

Treasured Tools
The brothers wield four of the five Treasured Tools of the Sage of the Six Paths: Bashōsen, Benihisago, Kōkinjō and Shichiseiken, all of which cost a large amount of chakra, enough to kill normal humans before they can utilize the tools properly. The brothers can use them due to the combination of their high chakra level and the Nine-Tails' chakra. By combining the Benihisago, Kōkinjō and Shichiseiken, they can capture their opponent's and body, sealing them away for good. The Bashōsen allows them to create any of the five basic elements.

Jinchūriki Transformations
Despite not being an actual jinchūriki, he had absorbed a large amount of the Nine-Tails' chakra while trapped in its stomach. So much so, that he was able to enter a more muscular version of Naruto Uzumaki's six-tailed form. However, it lacks the Nine-Tails' skeleton. Kinkaku also seems to retain his consciousness, unlike Naruto, who lost to his bestial instincts in this form.

Shinobi World War Arc
After his resurrection by Kabuto Yakushi, Kinkaku and Ginkaku are part of an Akatsuki coalition sent to the western coast of the Land of Lightning, where they are met by the First Division. As the confrontation commences, he recognizes Darui as the individual who inherited the Third Raikage's techniques, from the distinctive tattoo on his left shoulder, indicating to Kinkaku that he must be rather strong. After Darui's comment, he says that, since years have passed, people from Kumogakure started to stop respecting him and his brother. After Atsui and Samui arrive, he summons from his mouth the Bashōsen and Shichiseiken, giving the latter weapon to his brother, and while the Kōkinjō wrapping in his right arm. He hits both Atsui and Samui with Kōkinjō and orders it to release their word souls so Shichiseiken can cut them. He then reads the special word from Shichiseiken and uses Bashōsen to burn Atsui's arm, forcing him to say "hot", his special word, thus being sealed away. While his brother takes Samui hostage, Kinkaku attempts to attack Darui, but fails and Darui cuts his arm off. Darui then attacks both brothers with his Storm Release: Laser Circus technique freeing Samui in the same breath. Kinkaku however, kicks his severed arm with the Kōkinjō wrapped around it into Darui. He then cuts Darui's word soul and Ginkaku records it.

While Darui was being sucked into the Benihisago, he was able to change the word he used the most from "dull" to "sorry" inadvertently, thus canceling the sealing technique. He disarmed Ginkaku, causing him to crash into Kinkaku and the Kōkinjō. Darui then commandeers both the Benihisago and the Shichiseiken, and proceeds to continue his onslaught on the brothers by launching his blade at Kinkaku who deflects the sword only to be bombarded with another one of Darui's attacks. Darui then uses this opportunity to to curse and seal Ginkaku whose most used word was "Kinkaku". Afterwards, Kinkaku went berserk, entering into his six-tailed form.

When in his six-tailed form, Formation Ino-Shika-Chō causes him to respond to his name, allowing Darui to seal him into Kohaku no Jōhei.

Trivia

 * literally means "Golden Horn", and shares the same name as the Kinkaku Force, suggesting that Kinkaku was its leader.
 * Both Kinkaku and his brother are likely based on two characters from the Chinese classic "Journey to the West". In this story, Kinkaku and Ginkaku are two demon king brothers, known as the and the.

Quotes

 * (To Darui) "Like they always say, 'silence is golden'. Words are the true source of all the world's ills... right Ginkaku?"