*Android 18, originally named Lazuli when she was an ordinary human, is the older twin sister of Android 17 and Dr. Gero's eighteenth android creation, designed to serve Gero's vendetta against Goku. While her interests do not initially deviate from this expectation, her curiosity to activate Android 16, in spite of Gero's orders not to do so, leads Android 17 to take it upon himself to rebel and murder Gero. Eventually, Android 18 becomes a member of the Z Fighters, as well as the wife of Krillin and mother to their daughter Marron.

Android 18 is a fit and beautiful woman of above-average height and fair complexion. She has shoulder-length blonde hair, although its specific shade varied between light/golden or platinum that parts over her left temple, which she generally keeps tucked behind her ear. She consistently wears small gold hoop earrings on both ears. Her hair is apparently natural due to her not minding too much when Future Trunks sliced parts of it off during his fight with her (in stark contrast to her future counterpart, who in the English dub threatened him for cutting off portions of her hair and claimed it could not grow back). She has a fairly small chest in the manga, while in the anime, her chest was implied to be large enough that Master Roshi after their plane crashed took the opportunity to plant his face in her bosom and smother his face within, leading to her nearly killing him.

Her main look in the Peaceful World Saga was retained for Dragon Ball Super: Super Hero and wears her tracksuit in the Universe Survival Saga but with minor changes being the change to above ankle length gray with pink stripes jogger pants and a new pair of black sport shoes. Her jacket is magenta, her trousers resembling a sports capri which is light grey with pink linings. She also retains her grey shoes with white soles and fuchsia pink socks.

For the Universe Survival Saga, she wears a pink tracksuit identical to Gohan's during Frieza's invasion of Earth, and grey shoes with white soles.*