Android 18

Android 18, originally named Lazuli when she was an ordinary human, is the 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 murder Gero. Eventually, Android 18 becomes a member of the Z Fighters, as well as the wife of Krillin and the mother of their daughter Marron. Android 18 is a slender, curvy and beautiful woman of above-average height and fair complexion. She has shoulder-length hair that is either blonde or silver 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, where she threatened him for cutting off portions of her hair and claimed it could not grow back). In the Androids Saga when she is first activated by Dr. Gero, she wears a blue denim vest and skirt (with the Red Ribbon logo on the back of the vest) with dark blue tights, a brown belt, brown boots, and a black shirt that has white and black striped long sleeves. After her clothes were ruined in her battle against Vegeta, she changes to a western-style outfit consisting of a brown armor vest and skirt with dark navy leggings, a blue-green long sleeve turtleneck shirt, and brown cowboy boots. Later when the androids arrive at Goku's House and throughout the Cell Saga, she wears a black mini vest with a golden triangle pin, a white short sleeve undershirt with a pearl necklace, dark teal jeans with a golden chain, a brown belt, a pair of short black gloves with a gold bracelet on the left one, and black flats with orange socks.

When she is married to Krillin and living at Kame House, she wears a pale blue buttoned-up denim vest, white jeans, red hoop earrings along with a red bracelet on her left hand, and black flip-flops. Her blue eyes had a slightly darker coloration than last time. Later, at the World Martial Arts Tournament and throughout the Buu Saga, she wears a black shirt with white and black striped long sleeves, blue jeans, a brown belt, and black flats with orange socks. It is noticeable that this outfit incorporates between her first outfit in the Androids Saga and her third outfit in the Cell Saga as the shirt, belt, and color scheme is taken from her first outfit, while the jeans and flats are taken from her third outfit. In Dragon Ball Z: Battle of Gods, her outfit in the World Tournament Saga has some minor changes. The color of her black shirt has been changed to dark indigo along with the black and white stripe sleeves being recolored to purple. Additionally, the color of her jeans has been changed to pale blue and is slightly shorter while the color of her hoop earrings has been changed from red to silver. Lastly, the color of her socks has been changed to white with the upper portion no longer being rolled up, and her black flats has been changed to dark indigo and no longer contains the tie. She also wears a pearl necklace identical to the one she wore during the Cell arcs, only it was embedded with a thunder pendant, she now possesses blue-green eyes as opposed to her original blue. In Dragon Ball Z: Resurrection ‘F’, her appearance remains largely the same as Dragon Ball Z: Battle of Gods with the only noticeable changes being she no longer wears a pearl necklace along with the cuffs of her shirt and sleeves being colored white and now wears blue boots. Additionally, the bottom of her shirt no longer appears to be tucked in, now concealing her belt. At the end of Dragon Ball Z, she cuts her hair shorter which resembles Bulma's bowl-cut hairstyle from the Majin Buu saga and wears fashionable business attire. Her outfit is a red sleeveless shirt, pale yellow business pants, the pale gold hoop earrings she had initially worn during the Androids and Cell arcs, the same gold bracelet on her left wrist which she had worn during the Cell arc, and brown flats. She also wears the pearl necklace that she previously wore during Imperfect Cell Saga and the Cell Games.

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. Like her brother, Android 18 usually displays a cool and confident character, especially in battle, although her sarcastic humor is the most prominent trait of her personality. This is demonstrated when Goku takes notice of her assembly with the Dragon Team at the 25th World Martial Arts Tournament, leading to the retort "Look, he noticed. How cute." (in Japanese she says "Took you a while idiot!"), as well as saying "Spare me" when Krillin reveals to Goku that not only have they married, but also had a child. Shortly after this, she is asked by the World Tournament Announcer if her real name is legitimately "No. 18", to which she responds "My father was pretty dull" (in Japanese, she replies "That it doesn't matter" before tossing the number at the World Tournament Announcer). Although she isn't characterized for this, 18 can be very curious if she is really interested in something, to the point of activating her comrade Android 16, and wondering what present she will give to her husband Krillin during a dispute of a wish with the others using the Dragon Balls. She often expresses herself in her cool and downplayed manner well into her marriage with Krillin, often smiling in a somewhat subdued fashion that conveys her very laid back personality, in Super, however, she is often seen smiling. However, 18's sense of humor is not always tactful, as she jokingly expressed to Future Trunks that she wanted reimbursement for him killing her alternate universe counterpart, much to Future Trunks' displeasure. This is a rare instance where Android 18's humor was anything but tactful, as per her usual timing. This failure is likely due to Android 18 being unaware how murderous her counterpart was and how much Future Trunks had suffered because of it, as she likely would have been more sensitive had she known the full extent of the destruction and suffering caused by her and her brother's counterparts. She is also shown to be rather prideful, though not to the same extent as her brother had been during the Imperfect Cell Saga.  As an older sister and delinquent, and later as a wife and martial artist, Android 18 is shown to be outwardly commanding, insisting that she and her brother 17, and later she and Krillin, have to make strides to improve the family's financial situation, insisting Krillin to join the Tournament for the prize money, forcing Mr. Satan into a deal about giving her 20 million Zeni to the point of destroying his property and multiplying the prize money a hundred-fold, wanting Shenron to grant her wish for a present for Krillin, and initially saying that she would only fight at the Tournament of Power if she gains money for it although she later decides to enter because she suspects that the tournament is not really a game. In Dragon Ball Z: Supersonic Warriors, Android 18 is hinted to dislike driving solely because of Android 17's insistence on driving around aimlessly without anything better to do. However, 18 still exhibits some of her sensitivity and even protective side, especially towards her twin brother, daughter, and husband. This is in stark contrast to her alternate self from Future Trunks' timeline, where she is a murderous sociopath who cares for no one but herself and her brother though this is mainly due to the fact that Future Dr. Gero had altered Future 17 and 18 to hate humanity, which never occurred in the main timeline. 18 also possesses a vast distaste if not outright hatred of violence against children, to the point that after witnessing Lord Beerus's attacks against Gotenks she lost her temper and proceeded to assault him, despite his decisively superior power. This is likely due to her instincts as a mother and fondness for her friends' children despite being frequently annoyed by the underage Super Saiyans. Unlike her brother, she, like Goku and any other fighter, sometimes had the tendency to let her guard down during battle, allowing her opponents to take advantage, primarily because of her cool and laid-back attitude, as demonstrated by Shosa in the tournament.