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Naruto: Demon Fox
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Naruto's most useful offensive technique is the Rasengan, a jutsu his father invented. Unlike Jiraiya or Kakashi, Naruto has to use two hands to create the Rasengan, due to his lack of chakra control. However even with his two hands, he couldn't form a proper Rasengan sphere. It wasn't until his fight with Kabuto did Naruto use his own hand to create the shell, and used a shadow clone to spin the chakra creating a perfect Rasengan. When he is in his tailed transformations, he seems to have the ability to mold the chakra into a sphere using the demon fox's chakra alone. It was named the nine-tailed fox Rasengan.
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Naruto's most dangerous trait is his ability to draw chakra from the demon fox. Even without directly drawing upon it, a small amount of the demon fox's chakra is always mixed with his own. His body instinctively rejects the bulk of it due to the damage it would cause. Ebisu implies that Naruto's poor chakra control stems from this, as a portion of his chakra is used to reject the overwhelming fox chakra. According to Kakashi, Naruto's regular chakra level is about twice that of Kakashi's own. As such, he is naturally suited to jutsu that use a large amount of chakra, such as his specialty, the Shadow Clone Technique.
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Once the main matches begin, Naruto originally appears outmatched once again against the genius Neji. Despite this, Naruto continually questions Neji's outlook on life, even though every attack he tries is repelled. Neji eventually decides to finish the match by closing off Naruto's chakra points, but Naruto gets up from this attack, too. Impressed, Neji tells Naruto about his painful past and the cursed seal on his forehead. Neji insists that Naruto could never know what it's like to carry a mark that will be with him till death, though this couldn't be further from the truth. Not convinced by Neji's reasoning, Naruto calls upon the Demon fox's chakra and instantly evens the odds.
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Naruto's state of mind coincides with his tailed transformation states, which are characterized by a fox-shaped shield of chakra surrounding Naruto with a number of tails to indicate the amount of chakra. Naruto becomes more powerful with each "tail" the chakra shield grows, but in return ... loses more of himself to the demon fox. Up to his three-tailed state, he remains in control, though somewhat more feral than normal. He also starts feeling pain from the intense chakra. In his three-tailed state, Naruto has to fight the demon fox for dominance, and the chakra is intense enough to not only cause him pain, but anyone in the vicinity as well. Once he reaches his four-tailed state, the demon fox becomes dominant.
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Naruto was not good enough in studies to graduate. Mizuki-sensei advises him to steal the "Scroll of Seals," and if he learns a few techniques from it, then his teacher Iruka-sensei will surely let him graduate. The villagers find out Naruto has stolen the sacred scroll that contains many forbidden techniques, and, afraid that there might be something in it to release the Demon Fox, goes out on a frenzied search for him. Iruka-sensei finds Naruto and finds out that Mizuki is the one who really wants the scroll for his own evil purposes.
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Demon Fox