The center of the Killjoys Universe is the J star cluster and the Quad-system.
The Quad consists of 1 dwarf planet and its 3 moons. 1+3=4=Quad. Makes sense. It’s part of a solar system that's part of a massive star cluster known as "The J," which itself has tons of inhabited planets and moons. The quad is composed of an intricate caste system that correlates to the limited desirable real estate.