Kurotsuchi

is a ninja of Iwagakure and a bodyguard of the Tsuchikage.

Five Kage Summit arc
Kurotsuchi was setting off with Akatsuchi to escort Tsuchikage to the Five Kage meeting, called for by the Raikage. He suggests that the current Tsuchikage should retire.

Trivia

 * Despite his feminine appearance, he is male.