Kurotsuchi

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

Personality
Kurotsuchi is generally calm and easy going. She has displayed a powerful loyalty to her village, as she was more interested in killing the jinchūriki of the Eight-Tails and Nine-Tails than actually protecting them. She decided this was the best plan so Iwa could become stronger than Konoha and Kumo.

She is also a little disrespectful to the Tsuchikage in regards to his age, as she has often sarcastically implied that because the Tsuchikage suffers from things like back pain he should be replaced by someone younger. She also has a childish side to her, which she hides, as seen when she reprimands Akatsuchi on his childish excitement about flying when they were heading towards the Giant Island Turtle, though she was secretly excited about the prospect as well.

Appearance
Kurotsuchi has short, black hair and pupil-less pink eyes. She wears what seems to be a long, red kimono with the sleeve on her right arm missing as well as the bottom left side of the kimono, the brown Iwagakure flak jacket, fishnet tights and shorts over them.

Elemental Release
Kurotsuchi is a skilled kunoichi that is capable of using several elements. She can use earth release to erect a protective rock dome, that was sturdy enough to endure several tons of rock falling on it. Kurotsuchi can combine fire and earth elements to create lava release. She can use Lava Release: Quicklime Congealing Technique, and combine it with Water Release: Water Horn to increase its range and cause it to harden.

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 defeated 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 Eye of the Moon 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".

Confining the Jinchūriki Arc
Upon returning to their village, they were informed that the Earth Daimyo has approved the formation of the Allied Shinobi Forces. She and Akatsuchi then joined Ōnoki to reinforce the garrison on the Giant Island Turtle, before spotting and attacking Kabuto Yakushi and Deidara. After Ōnoki drew Deidara away to avoid damaging the turtle, she battled Kabuto and managed to trap him so that he could be interrogated.

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.
 * Kurotsuchi refers to Deidara as "Deidara-nii" (an honorific meaning "big brother", either as family or a sign of respect).
 * Kurotsuchi's eyes are similar to those of Han, also from Iwagakure.

Quotes

 * (To Ōnoki)