Android 19 is a large android with completely white skin, created by Dr. Gero to exact revenge on Son Goku for destroying the Red Ribbon Army. He first appeared with Android 20 on an island 9 kilometers southwest of South City, where they caused havoc until intercepted by Goku and his allies, who had been warned by Trunks.
Android 19 has the ability to absorb people's energy through his hands, giving him an advantage in combat. In "Dragon Ball Full Color: Artificial Humans & Cell Arc Volume #03," Akira Toriyama revealed that the model for No. 19 was a doll displayed in the command center of an enemy base, which Dr. Gero took as a war trophy.
Although not particularly strong, Android 19 managed to defeat Goku due to the heart virus Goku had contracted. He almost killed Goku by draining his energy but was interrupted by Vegeta, who easily overpowered him. Vegeta then transformed into a Super Saiyan, taunting Android 19 mercilessly and questioning if androids feel fear. After having his energy-absorbing hands torn off by Vegeta, Android 19 tried to flee in fear but was vaporized by Vegeta's "Big Bang Attack," leaving only his head behind.
In Dragon Ball GT, when everyone escapes from Hell, Android 19 is among them. However, he is quickly defeated by energy blasts from Son Goten and Trunks, the son of Vegeta.
(Sources: Wikipedia, Kanzenshuu)
