Cindy Aurum, known in Japan as Cidney Aurum (Japanese: シドニー・オールム, Hepburn: Shidonī Ōrumu), is a character in the video game Final Fantasy XV. Created by illustrator Roberto Ferrari, she is a mechanic that helps repair and upgrade the protagonist's car. She fills the role as the game's "Cid", a recurring character archetype within the Final Fantasy series that often has an affinity for machinery, and is the first female iteration of such. Since her debut, she has appeared in other games related to both XV and the franchise as a whole. She is voiced by Erin Matthews in English and Yū Shimamura in Japanese, and her motion capture was done by Haruka Shibai.

Since her introduction she received mixed reception, with early player reactions and media outlets feeling she was too sexualized, the latter repeating such sentiments after the game's release. Other outlets saw her as an example of XV's shortcomings, while others felt she soured the game's experience as a whole. However, she has also been a popular subject of cosplay and fan response, while other outlets praised her role in the game and considered her a breath of fresh air to the standard Japanese roleplaying game experience.

Created for Final Fantasy XV, Cindy, called Cidney in the original Japanese release, is a female mechanic created and designed by Italian artist Roberto Ferrari. Ferrari, who completed her design in 2010 when the game was called Versus XIII under Tetsuya Nomura, drew three poses for the character before leaving the development team due to a disagreement. According to Ferrari he designed all aspects of the character, down to her makeup and accessories. Some aspects of her appearance where inspired by his wife, Franca. In his designs her skin color was much darker, meant to resemble that of musician Beyoncé, but in the final game it was changed to a paler tone. Cindy is meant to fill the same role as recurring character concept "Cid" in the series, a recurring character archetype that is often associated with machinery and mechanical knowledge, and is recognized as the first female iteration of such.

Standing 165 centimetres (5 feet 5 inches) tall, Cindy is a white blonde woman with short blonde messy hair that frames her face. Her outfit consists of a yellow cropped jacket that exposes her midriff while partially unzipped to reveal a pink bra, blue daisy duke shorts, black leather stockings that go midway up her thighs, and white tall cowboy boots over them on her feet. Her accessories include a trucker hat with her car garage's logo on the front, black gloves, goggles around her neck, and an angled utility belt with a large pouch on each hip. When the project later became Final Fantasy XV under Hajime Tabata, Cindy's development was overseen by Yusaku Nakaaki. During an interview with Famitsu, when the interviewer commented about her cleavage, Tabata responded that the development team was "enthusiastic" regarding her, and early on her breasts were "shaking violently".

In April 2015, the development team discussed feedback they had received from the game's demo, amongst which was a complaint from European players that Cindy was "too sexy". After Tabata responded that she was not intended to be an "erotic character" and she was instead a "very energetic and outgoing, a very active character". He added that coupled with her appearance, the team felt that she would not be seen as problematic. When the game's marketing manager Akio Ofuji pointed out to Tabata that feedback seemed particularly focused on her outfit in relation to her role as a mechanic, he responded they did not want to change her character concept, and questioned if it was about "moderating the way she’s presented" due to perceived "overly sexual themes are being brought to the forefront, because that’s not who she’s supposed to be." Nakaaki agreed, stating that the male members of the development team "did their best to create her", with Tabata stating their "heart and soul" went into the work, though affirmed that if they felt it was too excessive they would modify it to ensure players were comfortable while playing in their living rooms.

As introduced in the 2016 roleplaying video game Final Fantasy XV, Cindy Aurum is a minor character, and with her grandfather, Cid, runs the Hammerhead Service Station, where she will repair and offer upgrades for the protagonist's car, the Regalia. Prior to the game's events, when she was a young child, she witnessed her parents being attacked and killed by daemons, monsters in the game's universe. Cindy also appears in the multiplayer expansion Final Fantasy XV: Comrades. She is voiced in all appearances in Japanese by Yū Shimamura, while in English she is voiced by Erin Matthews, who portrayed the character with a thick Southern accent. Meanwhile, her motion capture was performed by Haruka Shibai.

She later appeared as a playable character in Final Fantasy XV: A New Empire and its sequel Final Fantasy XV: War for Eos, mobile game spinoff titles. Outside of the Final Fantasy XV series she appears as a playable unit in Final Fantasy Brave Exvius, and on cards for the Final Fantasy trading card game.

Despite being a minor character, Cindy has been heavily promoted. She was first unveiled in the "Episode Duscae" demo for Final Fantasy XV, and later at CEDEC 2016 she was showcased as part of a presentation discussing how the development team created the character models and textures for Final Fantasy XV. A cosplay reference guide illustrating the individual parts of her model was also released. In 2017, Play Arts produced a poseable 11 inch tall figurine of Cindy. Meanwhile, her outfit is available as in-game clothing to customize player characters of Minecraft, the character Kaori in Blue Reflection, and the character Nono in #Compass.