Kostaza was a male alien individual who lived in the late 24th century.

In the 2370s, Kostaza was based on Farius Prime. In 2376, Quark heard that Kostaza was offering a lucrative business opportunity and Quark paid him some latinum. The Federation would later indict Kostaza and seize his assets, including Quark's investment. While the Federation ran an investigation into his business, Kostaza was banned from conducting financial affairs until its completion. (DS9 novel: Unity)