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.

Hiccup's OCD is a very picky, somewhat fussy Dragon who seems to have developed a bit of an Obsessive Compulsive Disorder, hence his name. He cannot stand any scales becoming dirty or uneven, and when checking for out of place scales, has to pick out 3 at a time. His pattern of scale cleaning leaves him pondered upon by the rest of the Dragons in the group and he is looked down upon by some of the more powerful ones.