Captain Ginyu

Captain Ginyu (ギニュー, Ginyū), or "Commander Ginyu", is the leading member of an elite mercenary platoon, the eponymous Ginyu Force. He makes his debut in "The Ginyu Force", the 272nd chapter of the Dragon Ball manga, issued on October 8, 1990, and he makes his first anime appearance in "Hidden Power", the 61st episode of Dragon Ball Z, which premiered on September 12, 1990. His name is a pun gyunyu, the Japanese word for milk.
Captain Ginyu is shown to be very loyal to his men and to Frieza, and follows any order Frieza gives him. He also however, can be quite harsh to his team members if they fail a mission, as shown when he harshly scolded Jeice for letting Burter and Recoome lose to Goku, and escaping from the fight. He however, likes fairness in his battles, as shown when he refused to break Goku's neck due to Jeice interfering in their fight.

Captain Ginyu and his comrades are commissioned after Frieza learns that Vegeta is searching for the seven Dragon Balls on Namek, and that the Saiyan's Power Level is growing rapidly, quickly surpassing Frieza's personal henchmen, Dodoria and Zarbon. The force spends five days traveling the stars en route to Namek, and upon reaching the planet, Frieza dispatches the team to capture Vegeta, kill his two companions (Krillin and Gohan) and recover the Dragon Balls which have since been stolen by Vegeta. Efficient as they are, the Ginyu Force do not take long to track down their targets and locate all seven Dragon Balls, with the rest of his team showing off their special talents, such as Burter 's tremendous speed and Guldo 's time freezing. Initially, Captain Ginyu intends to slay Vegeta by himself, but when his subordinates complain that they haven't had the opportunity to fight, Ginyu concedes, allowing them to deal with Vegeta and the others while he returns the Dragon Balls to Frieza's spaceship.
Captain Ginyu transfers the Dragon Balls back to Frieza, using his telekenetic powers to levitate the Dragon Balls, but the two almost instantly discover that they can't activate the artifacts to summon the Eternal Dragon. Remembering one of his previous Namekian victims whose last words told of how Frieza could never make a wish even with the seven Dragon Balls gathered, Frieza deduces that there must be a secret Namekian language custom used to activate them. The tyrant uses his scouter to investigate the vicinity for Nameks, finding three of them in an area that his forces left untouched (Nail, Guru and Dende). Captain Ginyu volunteers to force the secret out of them, but Frieza declines in favor of handling the task himself. In the meantime, Captain Ginyu is assigned to watch over the seven Dragon Ball


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