The Urchiv-ki were a sentient species originating from the planet Urch located within the Unknown Regions. This species' nation was known as the Tower Dimension. In 19 BBY, the Tower Dimension was one of several governments that fell under the control of General Yiv and the [Nikardun Destiny](/article/nikardun_destiny], which was the ruling Hegemony of the Nikardun species. Later, the Urchiv-ki's government was liberated from Nikardun control when Chiss Senior Captain Mitth'raw'nuruodo, whose core name was "Thrawn," defeated Yiv with the assistance of the Chiss Expansionary Defense Fleet. The Urchiv-ki took great pride in their art galleries, which Thrawn desired to explore due to his appreciation for studying art. Furthermore, the species maintained a treaty with the Chiss, facilitating diplomatic relations and meetings.
The Urchiv-ki made their debut appearance in Thrawn Ascendancy: Chaos Rising, a 2020 novel that served as the initial installment in the Star Wars: Thrawn Ascendancy Trilogy authored by Timothy Zahn.