Shimon Hijiri

is a Chūnin from Konohagakure.

Chūnin Exam Arc
He is a proctor for the written portion of the Chūnin Exams.

Trap Master Arc
Shimon was later sent by Tsunade along with many other chūnin to investigate a possible attack on Konoha. It was later revealed that the whole incident had been set up by Gennō.

Invasion of Pain Arc
He, Mozuku, and Tonbo Tobitake assist Inoichi Yamanaka in reading the mind 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.

Trivia

 * His eyes are obstructed by his bangs in the manga.