-JINCHURIKI-
Naruto Jinchūriki Forms As the jinchūriki of the Nine-Tails, both Naruto's mind and body are occasionally influenced by it. Physically, Naruto has some of the fox's characteristics, such as whisker-like marks on his cheeks and larger than normal canines. He also has increased stamina and healing abilities, which allows him to recover from major injuries within a day, and minor injuries within a few seconds. Mentally, Naruto remains largely unaffected, save for a few animalistic traits that slip through, such as his occasional tendency to leap between trees on all fours. Since the Nine-Tails was sealed inside Naruto at birth, it is unclear just what parts of his personality it has had an effect on; however, it could explain Naruto's impish side for pulling pranks to gain attention, as well as his stubbornness to never back down from a challenge. Naruto's normal chakra level is considered extremely high, partially because of the Nine-Tails. Even without directly drawing upon it, a small amount of the Nine-Tails' chakra is always mixed with his own. Jiraiya once commented upon the fact that Naruto's body is much too small a vessel to properly contain the chakra of the Nine-Tails, and his body will instinctively reject the bulk of it due to the damage it would cause. Ebisu implied that Naruto's poor chakra control stems from this, as a portion of his chakra is used to reject the Nine-Tails' overwhelming chakra. What chakra that does not get suppressed by Naruto's body is assimilated by his chakra, making Naruto's usual chakra capacity astronomically high for someone in his age group (or indeed anyone above his age group). According to Kakashi, Naruto's regular chakra level is about four times of Kakashi's own. As such, he is naturally suited to jutsu that use a large amount of chakra, such as his signature jutsu, Shadow Clone Technique. While most ninja are only capable of creating a few clones safely, due to the jutsu's hazard of equally dividing the user's chakra among the clones, Naruto is able to create hundreds while maintaining a decent supply of chakra in each one.
The Nine-Tails' chakra usually comes to Naruto during life-threatening or other stressful situations, given to him by the Nine-Tails itself to ensure its survival. Naruto eventually learns to contact the Nine-Tails and demand some of its chakra, which it seems to comply to out of amusement. The reason Naruto is able to access its chakra is because of the unique way in which it was sealed. Though the Nine-Tails remains trapped within Naruto, its chakra can leak out through the seal and mix with Naruto's. The Nine-Tails' near-limitless supply of chakra becomes an invaluable weapon for Naruto, often turning the tide of a difficult battle in his favour. Though useful, expanding the magnitude of his other abilities, Naruto cannot handle too much of the Nine-Tails' influence. As he draws upon additional amounts of the Nine-Tails' chakra, "tails" are produced, and from the fourth tail onwards he is reduced to animal instincts, no longer being able to differentiate between friend and foe. Although he usually has success from stopping himself from getting too far, once the fourth tail is attained he needs outside assistance to force the Nine-Tails' influence to recede.
