Kabuto's Sensei

Part I
This Unnamed Jonin is a shinobi from Konohagakure and was the Jonin of Kabuto's Genin Team during the Chunin Exam. While his genins were all spies for Otogakure, it's unknown if he himself was a spy as well, but when he is seen during Hiruzen Sarutobi's funeral, the look on his face suggests otherwise.

Part II
He reappears in a four-man group, searching for the Akatsuki members Kakuzu and Hidan.