Sartoy is a frigid planet located within the remote Mieru'kar sector of the northern territories of the Outer Rim. A vast majority of the planetary surface consists of frozen oceans, snowy wastes, and towering glaciers, which are broken up by an expansive swathe of volcanically active lands that dominate much of the southern hemisphere and planetary equator. Vast rivers of flowing lava provide enough geothermal heat to keep the surrounding territories relatively temperate, with the mineral-rich soil it gradually forges over the course of aeons having sprouted lush forestlands.

A planet of average size, Sartoy has a gravitational pull that is hospitable to humanoids and most other races. It completes a single rotation around its axis in roughly thirty standard hours, while the world has an orbital period of nearly two hundred and fifty days. The ice-bound domains of Sartoy are primarily inhabited by creatures that have adapted to frozen and snowy conditions, such as the D'oemir bears originally imported from the Socorro system or endemic subspecies of tauntauns and wampas. The planet’s forests are home to cousins of the gundarks, who evolved blubbery hides and thick furs to more easily withstand the cold climate, while the lithe vulptex are spotted with increasing frequency on the rocky plains free from the perpetual snow cover dominating the rest of this globe.

During the early years of the High Republic era, Sartoy was first prospected by a family of nobles from the Core Worlds who pursued new streams of income and revenue from untouched worlds in the distant Outer Rim. Upon discovering the mineral and ore riches of the planet, the noble house abandoned their holdings in the overcrowded Core Worlds and established themselves on Sartoy. They quickly attracted other nobles and wealthy families from worlds like Grizmallt, Neimoidia, and Duro, which similarly laid claim to the most resource-rich lands of the planet. Over time, the arrival of the nobility and the subsequent influx of workers and regular citizens gave rise to the establishment of an aristocratic republic on Sartoy, wherein the noble houses that first settled the world had permanent representation within its legislative bodies.

While Humans are a significant demographic on the planet, Sartoy is largely inhabited by non-Human races that are accustomed to cold climates and conditions, such as the Talz, Siniteens, and Pengauani, among others. The world’s cities are either located in its more temperate regions or have been constructed beneath dome-like structures that shield their inhabitants from the frigid and often deadly elements.