Modrons are a race of immortals known for their zealous adherence to the principles of law and order above all else. They have inhuman appearances, resembling geometric shapes with eyes, limbs, and wings. Just as fiends were considered the embodiment of evil and celestials the embodiment of good, so are modrons the embodiment of the universal principle of order. Sometimes, however, they become separated from their kind and are tainted by chaos, gaining their own free will. These individuals are called rogue modrons.