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Android 8 The first android created by the Red Ribbon Army that we get to see, #8 despises fighting. When ordered to kill Goku, he refuses, and teams up with our young hero. After Muscle Tower, #8 lives a peaceful, quiet life. Appeared in DB
Android 13 The main villain of movie #7, Android #13 and his two companions #14 and #15 travel back in time to complete Dr. Gero's primary objective: Kill Son Gokuu. He faces off against Son while the other Z warriors deal with his minions. After Trunks and Vegita defeat #14 and #15, their power cells and CPUs are absorbed by #13, who then turns into a huge, bright blue hulk. He is defeated when Gokuu absorbs his own Genki-dama in SSJ form. Appeared in DBZ movie #7
Android 14 A muscular android, #14 faces off against Trunks in movie #7. He is devoid of any personality, and lacks intelligence. Trunks eventually slices him in half with his sword. Appeared in DBZ movie#7
Android 15 #15 is a small, whiskey-gulping android that solos Vegita in movie #7. He is generally annoyed by his partner #14. Vegita decapitates him later in the movie Appeared in DBZ movie #7
Android 16 Android #16 is one of the oddest characters in DBZ, and he seems deeper and more complex than most characters on the show. Created by Dr. Gero as an experiment, #16 was never meant to be activated. Unlike his counterparts, he was not based on a human model and is completely mechanical. The most powerful of the three androids, #16 only exists in the main DBZ timeline. Very nature loving and quiet, he rarely ever fights unless it is absolutely necessary. Appeared in DBZ
Android 17 Created for one sole purpose, #17's mission is to destroy Goku. Constructed from a human base, #17 is not completely mechanical. Initially under the control of Dr. Gero, he breaks free and kills him. Even with his creator destroyed, #17's internal programming still gives him the urge to search for Goku and destroy him. This objective is soon put behind him when he is forced to run for his life from Cell. An adept fighter, #17 makes a reappearance in GT as a villain. Android #17 later appears in DBGT as a Super Android. Appeared in DBZ,DBGT
Android 18 #17's twin sister, #18 has identical fighting strength. Like her brother, she is also created from a human base. During her escape from Cell, Kuririn falls in love with her. To #18's surprise, Kuririn wishes for the bomb inside her to be removed with the Dragon Balls. They eventually marry and have a daughter named Marron. Appeared in DBZ
Android 19 Android #19 is Dr. Gero's personal servant and bodyguard. He is not too intelligent or strong, but possesses the ability to sap the energy from Ki attacks and physical contact. #19's downfall is that he runs out of power and needs to refill his batteries constantly. This eventually leads to his destruction. Appeared in DBZ
Android 20 Back when Goku had obliterated the Red Ribbon Army, a solitary scientist named Dr. Gero worked hard to create warriors capable of defeating this powerful boy. He toils for decades, but his work finally comes to fruition three years after the defeat of Furiza. Fearing death, he has his mind implanted in one of his androids shells, and becomes #20. Dr. Gero is responsible for the creation of Cell and all the other androids bearing the Red Ribbon logo, and like his servant #19, he can absorb energy from attacks and physical contact. Appeared in DBZ