Android 18 Profile
Android 18 is a fictional character in the Dragon Ball franchise. She makes her debut in "The Androids Awake!", the 155th chapter of the Dragon Ball manga, issued on March 10, 1992. She makes her first animated appearance in "Nightmare Comes True", the 133rd episode of Dragon Ball Z, which premiered on April 8, 1992. Dr. Gero's eighteenth creation, Android 18 was designed to serve Gero's vendetta against Goku, who overthrew the Red Ribbon Army as a child. While her interests do not deviate from this expectation, Android 18's curiosity to activate Android 16 in spite of Gero's orders not to do so lead Android 17 to take it upon himself to murder Gero (although in each timeline of the series alternate to the mainstream one, Gero is still killed by 17 despite there being no quarrel over 16, whom the androids have no interest in activating).
Android 18 is the second artificial human designed by Dr. Gero to be created by fitting a human being with cybernetics. As a mortal woman, she and her unnamed brother (the eventual Android 17) were runaways whom Gero kidnapped and conducted experiments on, resulting in their transformation into cyborgs. However, her ability to procreate was not impeded by these experiments, as evidenced by her giving birth to a healthy daughter, Marron. Gero's blueprints for Android 17 in Funimation's dub of the Imperfect Cell Saga suggest otherwise however, instead citing that 17 and 18 "are made up of organic substances padded after human cells", though every single reference outside of this, including a clarification statement in the World Tournament Saga within the same dub, agrees with the canon assessment of 17 and 18's being.
Initially cool and confident, 18's sarcastic humor later becomes the most striking trait of her personality. One example of her sarcasm is demonstrated when she is asked if her real name is legitimately "No. 18", to which she responds, "My father was pretty dull." Shortly before this conversation at the World Martial Arts Tournament, Goku takes notice of her assembly with the Z Fighters, leading to the retort, "Look, he noticed. How cute."
Android 18's birth name is never revealed, and following her allegiance to the Z Fighters after the defeat of Super Perfect Cell, she is referred to as simply "18".