Kurotsuchi

is a kunoichi from Iwagakure and a bodyguard of the Third Tsuchikage.

Appearance
Kurotsuchi has short black hair with slim, pupil-less eyes. She wears fishnet tights on her legs and a black skirt over it with black pants on the side.

Abilities
Kurotsuchi has shown the ability to erect a protective rock dome, similar to Yamato's Wood Release: Wood Locking Wall. It is unknown if she created it out of thin air, or from a pre-existing source. The dome was powerful enough to endure several tones of rock falling on it.

Furthermore, she was able to deal with Zetsu's Spore Technique single-handedly without inflicting any visible wounds.

Five Kage Summit arc
Kurotsuchi and Akatsuchi escorted the Third Tsuchikage to the Five Kage meeting. When they were leaving the Tsuchikage hurt his hips trying to carry his own luggage, so she suggested that he should retire. Despite this, they managed to arrive at the Land of Iron without further incidents. During the meeting, she came to the Tsuchikage's defense during the Fourth Raikage's outburst.

When Kurotsuchi heard that Sasuke Uchiha had infiltrated the meeting, she asked for permission to fight the man who killed Deidara. The Tsuchikage agreed, but told her to keep out of the Raikage's way. She watched Sasuke's battle from the shadows and, when Sasuke caused the room to collapse, created a dome to protect herself from falling debris. She also fended off Zetsu's Spore Technique. While leaving the Land of Iron, she suggested to the Tsuchikage that they eliminate Killer Bee and Naruto so they can foil Madara Uchiha's Moon's Eye Plan and weaken Konohagakure and Kumogakure. When he disagreed, she exclaimed that he wasn't acting like the stubborn old man she knew of. He responded that he remembered who he was before he became a "hard-headed old man".

Upon returning to their village, they were informed that the Earth Daimyo has approved the formation of the Allied Shinobi Forces.

Trivia

 * means "Black Earth".
 * Before the Second Naruto Fanbook, many fans were confused on Kurotsuchi's gender. However the fanbook revealed that she is a female.
 * As Kurotsuchi referred Deidara as "Deidara-nii" (an honorific meaning "big brother", either as family or a sign of respect), it is speculated that they could be siblings.