He is a friend of the Fourth Hokage, Nam Feng Shui, and the apprentice of the Sannin Jiraiya. However, he became a rebel ninja in Konoha just because he became stronger. But the third generation was also protecting him, because many geniuses died in Konoha.
After he defected, he was seriously injured and was rescued by the Akatsuki organization. Finally, Akatsuki was added, and the story began from there.
This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.