A lanky, bipedal humanoid sentient species, the Kyuzo originated on the gravity-heavy Outer Rim world of Phatrong. Life under these circumstances resulted in the evolution of dense muscle fibers far better developed than the average bipedal species’ and fast reflexes, which made them dangerous opponents on planets with standard gravity, though their thin arms and legs concealed their considerable strength. Kyuzo had green skin ranging from lighter olive shades to deep blue-green colors and wrinkled faces that sported a pair of piercing, yellowish eyes.

There were two primary phenotypes within the Kyuzo population: some had compound eyes, while others had eyes with black, slit-shaped pupils akin to those of humans. The exact genetic history behind this divergence was known to few non-Kyuzo scientists, but the two groups were genetically compatible, with offspring inheriting one trait or the other from a parent. Like many other species, Kyuzo spanned a wide range in terms of height and build with some members of the species towering over most other humans and others considerably smaller in stature. For example, the well-known bounty hunter Embo was lean and stood 1.99 meters tall, while Constable Zuvio was stocky and only stood 1.6 meters in height. In addition, some had only four digits on each hand, while others had five. Some Kyuzo could also be Force-sensitive.

Due to the uncommon makeup of their homeworld’s atmosphere, Kyuzo frequently wore corrective lenses and a highly pressurized filter mask or bandages over their faces to protect their sensitive respiratory systems and assist them in coping with uncomfortable climates like galactic standard habitable environments. As well as causing respiratory and vision problems, exposure to such conditions caused a Kyuzo to become ill within in a short period of time, interfered with their ability to concentrate, and slowed them down considerably, though the symptoms were not fatal.

A species known for its strong sense of justice and honor, most Kyuzo regarded oaths and contracts as unbreakable and many species sought to them as mercenaries, law-enforcement personnel and bounty hunters. A highly political species, the Kyuzo developed societies that spanned considerable geographical areas, and most identified as members of a particular country or region. Most major islands and continents were their own political units, though they did form a loose confederacy.

Kyuzo warriors traditionally wore wide-brimmed war helmets that also served as shields or as thrown missiles, which were originally designed as a headpiece by the inhabitants of the Kwaidan Peaks to protect travelers from torrential rains during monsoon season in southern Phatrong. The special headgear was also known as a Kyuzo hat. However, not all Kyuzo were fighters—they were found in a number of professions, and many lived simple lives as farmers and merchants. Despite their honor, Kyuzo had a fondness for rogues, and many of their myths and stories featured outcast heroes who are forced to oppose the social order. Kyuzo favored their own language, which consisted of quickly spoken short words and phrases. Although Kyuzos could learn to understand Galactic Basic Standard, the most prevalent language in the galaxy, without difficulty, and most picked up the skill at a young age, they found it difficult to speak and grammatically confusing. As a result, they favored their own language and relied upon electronic translators or interpreter droids to smooth their interactions with outsiders.

There were many social and political organizations on their homeworld of Phatrong, but one particularly noteworthy cultural phenomenon was that of clovocs, fighting orders that maintained law and order in specific regions of Phatrong. They existed apart from Kyuzo political structure and were hired by governments to help maintain the peace or fight their enemies. The hundreds of clovocs varied widely in numbers, expertise, technique, tradition, and structure, with each tending to keep a particular type of mission, such as mercenary work, local policing, or acting as a standing army.

In peaceful times, clovocs participated in grand tournaments featuring their best fighters to showcase their skills and attract potential patrons for their services. These stylized battles were generally not fought to the death, though accidents did occur, and a few Kyuzo warriors found themselves fleeing Phatrong after killing an opponent in one of these contest, lest staying to provoke the wrath of a powerful clovoc. Some clovocs encouraged their members or even entire branches to work offworld as mercenaries, while others forbade the practice. As many of the Kyuzo who traveled offworld were members of a clovoc, there warrior orders were one of the most recognized elements of Kyuzo culture in the galaxy at large.