Shadow Walkers are a strange breed that possess the ability to slip between the planes of reality, becoming immaterial. This allows them to hide in the shadows, either hunting from the concealment of near invisibility or evading enemies. Though they become corporeal to mate or to eat, they spend most of the rest of their lives walking in the shadows. Shadow Walkers are wary creatures, though on dark autumn evenings when the leaves fall to swirl in the chill, rain damp air, they may be seen drifting out from the shadows.

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.

The mysterious Kivaiy is rumored to be a descendant of stealth. The best chances of something catching a glimpse of him is a rainy October night, but even then he's hard to see. Because of his ability as a Shadow Walker, he is an advocate hunter known to attract his prey into an isolated area and dragging them off. As a hatchling, he often used his abilities in hide-and-seek games. But there is a problem when he does use his powers: people and dragons often claim to have seen a spirit when they have only seen Kivaiy traveling. His clan, the Uncita clan, have been pranked several times by Kivaiy. He occasionally catches raindrops and snowflakes when they are falling, which caused the fact that he may be fascinated by them. When something tries to communicate with him, he whispers, "Seluciberence" and slips back into the shadows.