Kin Tsuchi

was a genin-level kunoichi from Otogakure. She took part in the Chūnin Exams under orders from Orochimaru to kill Sasuke Uchiha.

Appearance
Kin had very long black hair, almost reaching down to the ground, tied by a violet ribbon right near the end, and black eyes. She wore a forehead protector, a pale green vest somehow similar to a flak jacket, and snake patterned pants and scarf, much like her team-mates: Dosu and Zaku.

Personality
Like her team-mates, Kin appeared to be overconfident in her abilities. She had a dislike towards Sakura due to her seemingly vanity for her hair and criticises her for focusing on her appearances rather than training. Like her team-mate Zaku, she loses focus on her opponent's tactics when overconfident and talking about her abilities. That is seen when she didn't recognise the Shadow Imitation Technique that Shikamaru was using on her while she was talking about her using her Shadow Senbon and Illusion Bell Needles. Kin also appeared to prefer to toy with her opponents by defeating them slowly and painfully as stated by her during her fight with Shikamaru in the preliminaries.

Abilities
Kin was an accomplished senbon user, as seen in the Chūnin Exams. When she was ordered by Zaku Abumi to "finish Sakura", she reached into her back pocket and grasped senbon instead of a kunai or another weapon. She could also attempt to strike her opponent's vital spots with them in order to inflict more damage, as seen during her fight with Shikamaru. She normally used them in tandem with the Shadow Senbon technique to make it harder for her enemy to dodge. In the anime, she also demonstrated a much more powerful technique, Illusion Bell Needles, a genjutsu supported by her use of senbon. It is also notable that Kin is the only member of her team to not have a physical alteration.

Chūnin Exam Arc
Kin and the rest of Team Dosu attacked Sakura during the second phase of the Chūnin Exams in their attempt to kill Sasuke. Kin grabbed Sakura's hair and criticised her on putting more effort on her appearance as opposed to her training. Sakura was forced to cut her hair to escape. When Team 10 came to Sakura's aid, Kin's body was taken over by Ino Yamanaka's Mind Body Switch Technique, and, because of that, she was injured by her own team-mate, Zaku.

In the third stage preliminaries, she was matched against Shikamaru Nara. Shikamaru initially believed her trick to be a simple combination of needles with and without bells in order to make him less alert of the latter. Kin, however, followed through using her strings to ring a previously thrown bell, further confusing Shikamaru. Shikamaru countered, contracting his shadow and minimising it under the string attached to a needle she threw; she didn't notice that a string at that height would not be able to cast a shadow. Shikamaru then proceeded to use Shadow Imitation Technique to make the both of them throw a shuriken simultaneously. Still bound to Shikamaru's shadow, she was forced to mimic his actions and bent backwards to avoid the shuriken but was too close to the stadium's wall and hit her head, knocking her out.

Invasion of Konoha Arc
Kin, along with Zaku, were later betrayed and used by Orochimaru as sacrifices to summon Hashirama and Tobirama Senju's souls with the Summoning: Impure World Reincarnation technique.

Trivia

 * Kin is named for the sound of metal clashing, specifically samurai swords in battle. "Tsuchi" means earth. It's also the Japanese name for one of the three ear bones, hammer.
 * In addition, Kin can mean "gold" in Japanese.
 * In Finally a clash! Jōnin vs. Genin!! Indiscriminate Grand Melee Tournament Meeting!!, Kin stands beside Hanabi Hyūga before the start of the event.
 * Like many of the other characters, Kin appeared in the omake at the end of Naruto Shippūden episode 129, along with the rest of her team.

Quotes

 * (To Shikamaru) "Don't ever ask for whom the bell tolls, because it tolls for you."