The planet had two continents, named Forethought and Afterthought and the poles were covered in large ice caps. A notable feature was the low gravity and the great flatness of the plains-covered landmass. It was said that no point exceeded more than 20 meters above the sea level.
The average temperature of the planet was around 25°C and did not vary much over the year.
The planet had one moon.
The planet was home to two native species: The near-human Ropagu and the long-lived Kalduu. For as long as around 4000 BBY, the Ropagu had been constantly at war with each other and the land was divided in around forty-five nations. Each nation had different goals and agendas.
The Kalduu eventually contacted the Ropagu and used their mental powers to subtly influence their thought patterns. With this, both species began a symbiotic relationship: The Ropagu gained insight in the Kalduu intellect, while the Kalduu consumed the bacteria and germs off their host's bodies.
The Ropagu's society evolved into a peace-based one. Military training and methods were abolished and discussions became the mean to solve conflicts. While the more future-oriented philosophers resided on the continent Forethought, the more history-focused Ropagu lived on Afterthought. The two factions developed a rivalry and tended to look down on each other. The Ropagu also became very skilled in technical skills, such as droid maintenance and computer programming. A monorail network connected the cities on Forethought and skyshuttle service ran between all the planet's cities.
While the Ropagu considered themselves above physical conflict, they still saw the need for armed forces. The Ropagu began to hire off-world mercenaries for security. With the system being along the well-traveled Enarc Run, Ropagi II became rich due its large natural resources. The planet also became the largest market for mercenaries. However, all off-worlders were restricted to a single city, called Off-Worlders' Quarter, and several orbital platforms, which spared the planet the hazards of industrial pollution. While hiring mercenaries, the import of weapons was strictly forbidden and carried a sentence of two to twelve years of confinement.
With the establishment of the Kira Run in 70 BBY, Ropagi became known as one of the "Twin Stars of Kira".
During reign of the Galactic Empire, the planet was one of the numerous member worlds. The Empire, however, rarely intervened in Ropagi II's politics. Defense of the planet was handled by Leesa One-Eye and a space force of six Y-Wings. Even after the Battle of Endor the Ropagu had not decided whether to support the New Republic or the Empire, but they would service both sides of the war.