Nail

Nail (ネイル, Neiru) is a warrior Namekian and described as the lone "fighter class" Namekian left. He is the personal bodyguard to Grand Elder Guru, and is incredibly strong for a Namekian. In fact, he is the most powerful Namekian alive at the time of Frieza's attack on Planet Namek. He would later fuse with Piccolo, meaning he would continue to hold the title of the most powerful Namekian, as he was part of Piccolo's immense strength.
Nail takes a very similar appearance to Piccolo. He dons a blue vest and a white scarf around his neck. His chest and stomach are mostly exposed. He wears a blue belt (similar to that of Piccolo's) with white pants (also similar to Piccolo's, only a different color), and brown pointed boots (which are identical to Piccolo's and the other Namekians).

Nail takes on a very heroic, honorable persona. He dedicates his life to the protection of Grand Elder Guru, the Grand Elder of Namek. He cares deeply about his Namekian brothers, something he shows greatly during his battle with Frieza. Despite being the most powerful Namekian of his time, with a power level of 42,000 (making him comparable to the ranks of the Ginyu Force in power), he is easily brushed aside by the immense power of the galactic tyrant Frieza. Despite being completely outmatched, he continues to attack Frieza, only to suffer a brutal defeat. After fusing with Piccolo, his soul continues to reside within the ultimate Namekian warrior, giving Piccolo his knowledge.

Information from:
http://dragonball.wikia.com/