Gari

A ninja who was resurrected by Kabuto Yakushi to fight in the Fourth Great Shinobi War. He was apparently a very powerful and well noted shinobi during his lifetime.

Appearance
He has spiky dark hair and angular cheek bones, characterized by a prominent line running down either side of his face. He wears a standard Iwagakure flak jacket, and single sleeve shirt underneath, leaving the entirety of his right arm exposed except for the presence of his forehead protector, wrapped around the upper portion of his arm.

Confining the Jinchūriki Arc
Shortly after his resurrection and during the course of relocating to an unknown destination, he over hears Haku and Zabuza Momochi conversing with each other over the state of their present condition, where he reveals to the pair the exact nature of the forbidden technique used to summon them and the most probable reason for an individual to do so.

Trivia

 * This particular ninja bears numerous stark similarities in appearance to another unnamed character associated with the usage of Hiruko's Chimera Technique, during Naruto Shippūden 3: Inheritors of the Will of Fire.