Ginyu

Captain Ginyu is the leader of the Ginyu Special Force and the second strongest in Freeza's troops. He is a purple skinned mutant with black horns and delights in striking battle poses. He and his team were called by Freeza to Namek because of Vegeta's betrayal and Dragon Ball theft. The Ginyu Force found Vegeta, Son Gohan, and Kuririn and Ginyu would take the Dragon Balls to Freiza, leaving his four minions to take care of the Z Fighters. When Son Goku arrived and three of the Ginyu members were dead, Captain Ginyu would fight next. He was awed by Goku's awesome power from his Kaio-Ken and thought he was a Super Saiyan, but Goku gave him a chance to leave. Ginyu saw no Super Saiyan because one was supposed to love battle and bloodshed, but realized that he was no match for Goku and then smashed up his body and revealed his ability to change bodies at will, taking Goku's as his own. Ginyu tried to use it against Gohan and Kuririn, but was not accustomed to the body and lost easily. Ginyu, tired of Goku's body, saw Vegeta kill Jeice and went after his body. But when he fired his change beam, Goku threw a frog into it, switching Ginyu into a frog. In an anime filler, Ginyu manages to switch bodies with Bulma after she takes interest in him and gives him a voice collar. He tries to take Piccolo's body, but Gohan prevents it and Ginyu is once again a frog. He is taken to Earth after Dende wishes for everyone to be off except Goku and Freeza. Ginyu is later killed when Kid Buu destroys the Earth and seen in Hell in GT, his original body intact.

Ginyu has done the body change many times so his true form is still a mystery switching body's of those he believe is stronger than himself gaining there power and strength.