Lumina Dragons received their names from their highly reflective scales, which—at times—seem to glow. They are vain, always strutting about and preening incessantly; if one of their scales has so much as a scratch or a defect, they’ll remove it. Luckily, their scales grow back quickly, and each new growth is more beautiful than the last. These narcissistic dragons live in small groups and prefer to surround themselves with beauty. The females guard their territory and eggs while the males search for vegetation to eat.

Dragons are highly-intelligent reptilian creatures that—from a human perspective, at least—appear to live forever. Many different varieties of dragon exist, each with their own unique qualities, habitats, and behavior. Adolescence in dragons is usually marked by the growth of a hatchling’s wings, although not all breeds of dragons grow wings and some breeds have other traits that indicate the beginning of maturation. In Galsreim, dragons and humans coexist peacefully.

Illumin is always found preening his scales. At some points, he flies about, showing dragons his beautiful scales and how they shine. He was nicknamed the "Light of the Cave," since his scales seem to glow when sunlight strikes them. The most dazzling thing about him is his golden chest plates. Some dragons could see their reflection in his shining, clean chest plates, and others would sit there for days, admiring him, until he became bored.

Illumin's friends are Aquatic, Shepherd and Regel.