Pyria IV is one of the two planets where the Pyrian War of Year 16 took place. Pyria IV is the closest planet to the sun, but also situated within the habitable zone of the system, making it one of three planets that can naturally support life. Being so close to the sun makes the planet one of the hottest habitable surfaces in the galaxy. Pyria IV is also within range of the Versied Asteroid Belt, making it a common site for asteroid impacts.

Along with an extensive mountain range in the northern hemisphere, there are also volcanoes scattered across the planet. The few swamp areas provide the only natural drinking water on the planet for wildlife. As for vegetation and wildlife on Pyria IV, it can mostly be found in the swamps. As there is no plant life to provide shade for the wildlife that call the planet home, Pyria IV is also the most sparsely populated planet within the system. Economically it is the least developed planet in the system as of Year 22.

Scientists do have a real concern for the planet since its discovery. It has been recorded that Pyria's gravity is strong enough to be pulling Pyria IV closer each year. Scientists hypothesized that within the next thousand years the planet will be fully consumed by the sun with only five hundred years before the atmosphere is vaporized. Pyria IV remains off-limits to visitors, and there is a planetary shield in place. Thermal protective gear is recommended when traveling on the surface between domed outposts.