Tenzen's Bodyguard

He was the bodyguard of Tenzen Daikoku and he wielded Zabuza Momochi's Decapitating Carving Knife.

Itachi Pursuit Arc
Sasuke Uchiha and Suigetsu Hōzuki confronted Tenzen at his castle to obtain the Decapitating Carving Knife which he claimed at Zabuza's grave when he was originally after Zabuza. Tenzen gave the sword to his strongest henchmen and made him his bodyguard. Tenzen's bodyguard crashed through the wall and slashes Suigetsu with Zabuza's sword but is shocked to see Suigetsu survive the slashes. Suigetsu increases the size of his arm and grabs the sword, tossing Tenzen's bodyguard out of the hole in the wall.