Ryun Jinchūriki Forms

Ryun Uchiha is the Jinchūriki of the Ten Tailed Fox. When Ryun taps into the demon fox's chakra, it increases every physical aspect of his body. Near-limitless chakra, massive strength, increased speed and stamina, an almost impenetrable chakra shield, and increased healing. Ryun has unique access to the demon fox's chakra due to the seal that Yomi Uchiha placed on him. The seal split the demon fox's chakra in two halves, the Yang chakra made it inaccessible to Ryun, but the Yin chakra allowed Ryun to access it.

Jinchūriki Form
By simply tapping into the demon fox's chakra, Ryun's blue eyes turn red, his pupils become slitted, his nails and canine teeth grow long and sharp, his brown hair becomes longer and spikier, and his whisker marks become more feral. Depending on how much chakra is unleashed, the blackish-red chakra could glow around his body in an untamed way. Ryun first reached this form when Tora Uchiha's friends tried to separate him from Ryun, causing the pure rage to take over allowing the demon fox's chakra to leak out of the seal.

Even though this is the weakest state of his Jinchūriki forms, it is still a deadly foe as it increases his physical strength and healing well above most shinobi, and increases his speed to such high levels that nothing short of a fully matured Sharingan is able to track his movements. Until special training from Madara Uchiha, Ryun could only reach this state through rage or if his life was in imminent danger, but after having a inner talk with the demon fox, he is able to tap into the demon fox's chakra on his own, or by simply telling the demon fox to give him some power.

One-Tailed Transformation
During Ryun's battle with Jake at a ravine on the Land of Fire's border, when Ryun was at the mercy of Jake, the demon fox told Ryun that he should be grateful to it and gave him more chakra. The amount of chakra is so great that it leaks out of his body in a denser state. All the physical traits of the basic Jinchūriki form are present and slightly altered, including a black ring appearing around his eyes, longer nails and canines, and more berserk looking eyes, with one major bonus; the red chakra becomes a complete shield around his body, in the shape of a fox, complete with long ears and a tail, known as the demon fox's cloak or shroud.

In his one-tailed transformation, Ryun fights more like a beast. Instead of using his fists, he uses his sharpened claws.In this form Naruto has also shown the ability like in his other forms to make a shockwave with a simple wave of an arm. While he can stand on his own two feet, he can move at greater speeds on all fours. But his most powerful weapon is the chakra itself. The bubbling chakra appears to have a mind of its own: when a strike that was meant for Jake missed, the chakra itself stretched off Ryun's arm and hit Jake before he could react. Since the chakra has a mind of its own, it is extremely difficult, if not impossible, to predict Ryun's movements, as Jake was able to see Ryun perfectly, but couldn't predict what the chakra would do with the Rin'negan. The chakra can stretch far from the body, as Ryun was shown using his "arms" to attack Jake from great distances, at one point being on an opposite side of the valley, and still attacking him with the chakra arms. The shield around his body appears to be impenetrable, comparable to Gaara's Ultimate Absolute Defense: Shield of Shukaku.

Two-Tailed Transformation
After catching the Kagekenin member, Kaci Wells, and beating what he thought was Kaci to pieces only Ryun to slip into his two-tailed transformation. His physical characteristics match the first two forms, but his red eyes and canines grow larger, and his lips get a black outline, similar to fox gums. The chakra shield's only difference between the one-tailed transformation and the two-tailed is the extra chakra tail that has grown.

While in this state, Ryun is still in control of his body, though to what extent is unknown. He once punched a tree, destroying it and a long line of trees behind it, and later he attempted to attack Sanji of the Black Sea, who later tried to calm him down, and possibly tried to stop him from finding Kaci. The amount of chakra produced by the two-tailed transformation was so great, that even Seireitou Hyuga doubled over in pain from the chakra.

Three-Tailed Transformation
After Javelin Sanmaru revealed himself to S.W.O.R.D and baited Ryun with news of Tora, Ryun went on a rage and first attacked him in his one-tailed state. When that failed, along with further baiting from Javelin, Ryun skipped the two-tailed transformation altogether, and went straight into his three-tailed transformation. The three-tailed state looks similar to the two-tailed state with the demon fox's features on Ryun becoming more pronounced. Also, another difference includes the number of tails. His eyes later become similar to the four-tailed transformation, but can return to normal.

The amount of chakra produced from this form is devastating. The very air around Ryun begins to hurt. This is the strongest form Ryun can reach and control. With the standard chakra shield's protection and attack power, a simple roar has the power to create a devastating sphere of destruction.

Four-Tailed Transformation
When Javelin further taunted Ryun about Tora, Ryun in a fit of fury and anger, slipped into the demon fox's grasp. The demon fox's chakra began to burn its way through Ryun's body, destroying his skin, and rapidly healing it at the same time, eventually covering his entire body in a mix between the demon fox's chakra and his own blood. Everything from his face to his chakra tails became completely solid, his eyes losing its characteristics and becoming empty glowing circles surrounded by a black mask made of chakra.

In this state, in effect, Ryun takes the place of the demon fox inside the cage. The demon fox has complete control over Ryun's body, making it a mere skeleton for the fox's chakra, and every living thing in its way a target. The four-tailed transformation has all the benefits of the other tails, with upgrades. With a simple wave of his hand, it can send a shock wave of destruction for miles. The chakra shield, while being solid, still completely protects Ryun's body, and is so hot that it can burn the skin on contact. If Naruto is hit, the chakra itself can form another body, and strike back almost instantly. The demon fox also has the ability to charge a concentrated ball of chakra, consume it, and then fire it with such a force that it could destroy five Rashomon gates without losing strength. Finally its chakra shield's defensive power is so great that it is impregnable to any form of attack. Even Seireitou's legendary KyuubiTaishou couldn't break the exterior shell of the demon fox's chakra, only bending it slightly.

In the end, despite it being Naruto's strongest Jinchūriki form revealed so far, the four-tailed transformation is Naruto's greatest downfall. Because the demon fox's chakra is constantly destroying and creating new cells, it also shortens Naruto's life, similar to Tsunade's Creation Rebirth. Also, because the demon fox has complete control, Naruto will attack anything that moves, including his friends. This discourages Naruto from using this state more than the fact that it shortens his life. Naruto first slipped into this state when he was training with Jiraiya, because he used the toadkey to "twist" the seal the Fourth Hokage placed on Naruto. A small "twist" of the seal unleashed the four-tailed transformation and almost killed Jiraiya. Naruto also requires healing immediately afterward, otherwise, due to his lack of skin, it would be nearly impossible for him to move through the pain.