Raidō Namiashi

serves as the Third Hokage's assistant during the Chūnin Exams, and is characterized by a large scar on his left cheek. He is usually seen with Genma Shiranui and Aoba Yamashiro.

Abilities
Despite the handful of fights he has been in, Raidō has yet to be seen in extended combat. Given that the Sound Four needed to activate their cursed seals in order to defeat him, it is likely that he is a formidable fighter. It was shown that when Hidan and Kakuzu attempted to kill Kotetsu and Izumo, Raidō successfully, attacked and fended off Kakuzu with a Sword called Ebony Blade.

Chūnin Exams arc
During the final rounds of the Chūnin Exams stays in the box seat with the Third Hokage. He keeps the Third informed about what is going on and communicates the Third's wishes to the other ninja involved with the exams. When the invasion of Konoha begins, Raidō is attacked by the Sound Four, disguised as the Fourth Kazekage's bodyguards, to keep him from helping the Third Hokage.

Sasuke Retrieval arc
Raidō is sent on a mission with Genma Shiranui, Iwashi Tatami, and Shizune. During a break on their way back, Raidō and Genma encounter the Sound Four. In order to beat Raidō the Sound Four must first activate level two of their cursed seals, leaving Raidō gravely injured and in need of medical attention by Shizune.

Hidan and Kakuzu arc
Raidō appears in Part II as a member of the Nijū Shōtai, assisting Asuma Sarutobi's team in the fight against Akatsuki. After Hidan and Kakuzu are distracted by Aoba's crows, Raidō, dressed in black, attempts a sneak attack on Kakuzu with a black sword. Kakuzu is able to defend against it, but by doing so Raidō learns some valuable information about Kakuzu's abilities and gives a chance for Kotetsu and Izumo to get away.

Trivia

 * "Namiashi" means "walking pace" while "Raidō" means "following blindly."