Chriirah is a habitable planet orbiting around orange dwarf k-type star, and homeworld of the Birrin species. Similar to size and density of Earth, Chriirah is by comparison a hothouse world presently dominated by eroding continents and vast, ice-free oceans. The Birrin are a sentient, non-humanoid hexapod (six limbed) species native to planet Chriirah. They are an egg laying species, and clutches typically contain 3 or 4 eggs.