Gozu

Gozu (牛頭) is a shinobi who appeared in the second Naruto Shippūden filler arc. He is a subordinate of Guren He is unsociable and quiet, making people unable to figure out what he is thinking, but his battle skills are without a doubt very dexterous. He relies on taijutsu and brute strength and preferred fighting alone. He holds a special sentiment towards Guren and was her most loyal subordinate, even stating "I will accompany you no matter where you go". The reason for this was that Guren saved his life while he was imprisoned by Orochimaru, giving him water when he was dying of thirst.