Mozuku

is a Chūnin from Konohagakure.

Chūnin Exam arc
He acts as one of the proctors during the written portion of the Chūnin Exams, watching out for signs of cheating. He later fetches Anko Mitarashi when Team Shiore is found dead.

Hunt for Itachi arc
In the anime, he, Anko and Iwashi are seen on a mission shortly before Anko senses Orochimaru's death.

Invasion of Pain arc
Mozuku, along with Tonbo Tobitake and Shimon Hijiri, facilitate in Inoichi Yamanaka's Mind Reading of Yūdachi. When the invasion of Pain starts, they help distract the Animal Path to give Inoichi a chance to analyze what he has learned.