Dosu Kinuta

Lord Orochimaru, or rather Orochimaru, now do you see? I'm more than a mere puppet.
~ Dosu Kinuta

Dosu Kinuta is a minor villain in Naruto and a skilled genin from the Hidden Sound Village. He, along with Zaku Abumi and Kin Tsuchi were allegedly hired by Orochimaru to kill Sasuke Uchiha during the Chunin Exams, but he soon realized that he was just being used to test Sasuke's abilities. Soon after, Kabuto Yakushi uses him in the same manner to test Gaara's powers, but he is killed in the battle.

Powers and Abilities

Melody Arm - a gauntlet with holes drilled into it that amplifies sound, attacking the inner ear and causing debilitating effects. He easily defeats opponents such as Rock Lee and Choji with it, and can even throw Kabuto off-balance with it.

Listening - he cheats during the written part of the Chunin Exam by listening to the patterns of the pencil strokes.

Stealth - Though not fully demonstrated in the series, Dosu is able to successfully sneak up on Gaara; note that Gaara is apparently as stealthy as Kakashi Hatake.

Perception and Intellect - He was able to instantly spot a disguised trap set by Sakura Haruno, and was the only member of the Sound Genin who was able to fully deduce Orochimaru's plans.