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.

Tandwiel is an interesting tinsel, especially with his distinct love for fruits. Bananas are always his favorites, but he also enjoys apples, peaches, pears, pineapple, and more. He also loves to sing, and it is a particular talent of his. While he isn't near as vocally talented as his coworkers, Butterfly Galaxy and Titan Hunter, he is the most creative dragon among the three killers. The performers have taken a liking to constantly attempting to kill each other, as a strange sign of their friendship. Tandwiel is a bit more creative in his strategies, but easier to escape once the initial shock wears off. He has been known to create elaborate traps from wood that would immobilize his victim (at least until they burnt it away or tried hard enough; it wasn't all that strong) and then team up with a Red, an Ember, or other fiery dragon to drench his victim in boiling water. Hunter and Butterfly have learned to avoid most of his traps, but he keeps coming up with more surprises for them.