Sora (ソラ) is a monk that appears in the first filler arc of Shippūden. Sora also has the Nine-Tailed Demon Fox's chakra which was implanted in him genetically, and which gives him one arm of a Jinchūriki. Sora wanted revenge on Asuma Sarutobi for killing his father.
Background Not much is known about his childhood, only that he looked up to his father greatly and one day went berserk and wrecked the Fire Temple, a place otherwise believed to be an indestructible fortress. Afterwards, he was loathed by some of the monks of the temple, and soon began receiving the same ostracizing treatment as Naruto experienced while young.
He wanted to become part of the Twelve Guardian Ninja. He hates himself because of his powers and gets angry when people stare at him. When he first met Naruto, they hated each other but eventually became friends. Sora does not like getting help from people, especially ninja. He did not even want Team Yamato to come.