Mizuki

Mizuki Touji appears in the Exposition arc as the first antagonist, of Chunin rank. He used Naruto to steal the scroll of seals for Orochimaru, and told Naruto about the Nine-Tailed Demon Fox. His signature abilities are unknown, although he seems to favor the use of large shurikens.

He appears later leading a breakout of the prison with the help of Fuujin and Raijin, but was recaptured by Naruto and Iruka. He took the form of a Tiger-like beast after drinking a potion. The potion had temporary effect, and almost killed him. After being recaptured, he was interrogated by Tsunade, but he does not know where Orochimaru is.