Android 17

Android 17 is a supporting character in the Dragon Ball manga, and the anime series Dragon Ball Z and Dragon Ball GT. He is Dr. Gero's seventeenth android creation, designed to serve Gero's vendetta against Goku who overthrew the Red Ribbon Army as a child. Despite his interests not initially deviating from this expectation, Android 17 takes it upon himself to kill Dr. Gero, who is uncooperative with Android 18's curiosity in activating Android 16. Eventually, he redeems himself and aids Piccolo fight against Cell before being absorbed. He maintains a solitary life, but eventually helps Goku later so he can summon energy for the Super Spirit Bomb against Kid Buu.