Giru

Giru (ギル, Giru), originally known as T2006 or DB4649T2006RS, is a Machine Mutant that accompanies Goku, Pan and Trunks on their quest to find the Black Star Dragon Balls. He is best friends with Pan; however, he is frequently the recipient of a lot of abuse (both verbal and physical) at the hands of Pan, which makes him somewhat fearful of her. In the Japanese and Blue Water dubs he is called Gill.
Trunks, Goku and Pan first met him on Imecka, while he was on the brink of death. After eating the Dragon Radar for energy, he tried to escape from them, but was ultimately caught by Goku. After that, they found out that the radar integrated into his software. Giru then helps the group on various planets (Monmaasu, Gelbo, Beehay, Planet Luud, Rudeeze, etc).
Upon arriving on Planet M-2, he betrays them but is actually pretending as ordered by Trunks. Giru was initially programmed to find and lure the Saiyans to the planet in order to use their DNA but due to a memory failure, he forgot the entire thing until the team nears Planet M-2. He tells Trunks the truth of his mission and together, they decide to make the 'inhabitants' of the planet believe that Giru is acting according to their programming, by giving them data to capture Goku, Pan and Trunks.
After he sets the trio free, they find Dr. Myuu's evil creation Baby and seemingly destroy him. Trunks and Goku then finished off General Rilldo, an unstoppable mutant who can control metal, and leave the planet for good.


Information from:
http://dragonball.wikia.com/
Information picture :
http://tekilazo.deviantart.com/