Raidō Namiashi

serves as the Third Hokage's assistant during the Chunin Exams, and is characterized by a large scar on his left cheek. "Namiashi" means "walking pace" while "Raido" means "following blindly."

Sasuke Retrieval
After the Chunin Exams, Raido and Genma Shiranui confront the Sound Four, who are forced to go to level two of their cursed seals to defeat them. The Sound Four later comment that if it hadn't been for their cursed seals, Genma and Raido would have defeated them.

Hidan and Kakuzu
In Part II Raido appears as a member of the Niju Shotai, assisting Asuma Sarutobi's team in the fight against Akatsuki. After Aoba Yamashiro covers the area in crows, Raido, dressed in black with a black sword, is able to sneak up on and attack Kakuzu. While he is unable to damage Kakuzu, he is able to learn some valuable information about Kakuzu's defensive capabilities. He is then seen asking Kotetsu Hagane if he was ok.

Abilities
His abilities are mostly unknown but it appears that raido wields a black blade which he can use to injure opponents with while dressed in black to cover his movements. He also appears to be very strong seeing as though the sound ninja four had to use all of their powers to defeat him.