Nail is a Namekian who closely resembles Piccolo, except for his attire. Known as the last surviving "fighter class" Namekian, he serves as Guru's personal bodyguard and is exceptionally strong for his race.
During the Captain Ginyu Saga, Nail confronts Frieza to prevent him from killing Guru and seizing the Dragon Balls. Despite Frieza being at his lowest power level of 530,000, Nail was no match for the tyrant and even lost an arm in the battle, which he regenerated using his Namekian ability. Before Frieza could deliver the final blow, Nail revealed that the fight was merely a stalling tactic so Dende could give the Earthlings, Gohan and Krillin, the password for the Namekian Dragon Balls. Enraged, Frieza leaves Nail to die on the ground.
Shortly after, the newly resurrected Piccolo arrives and finds the injured Nail. Although still able to speak, Nail asks Piccolo to fuse with him to boost their chances against Frieza and save his life. After some questioning about Nail's motives, Piccolo agrees, resulting in a dramatic increase in his power level, making him more than a match for Frieza's second form.
