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.

Senka loves to prank people as well as dragons in the country Dragomir. She is known to pull at the beards of unsuspecting men, tickle the hatchlings, and play with maidens' hair. This behavior may be attributed to her lonely youth, when she couldn't control her invisibility and often disappeared, much to her dismay. She probably felt ignored and isolated by the citizens of Dragomir, and became very shy of others. Her pranks may be her way of expressing her affection and need for attention, for her pranks never harm others, and there are instances when she helps people carry heavy luggage and play with hatchlings while still invisible.