Undine Dragons are named for the water spirits with which they share territory. They have close relationships with these spirits, and are able to communicate with them. In exchange for protection and respect of their mutual freshwater homes, laid eggs are often protected by a blessing. This blessing stays with the dragon into adulthood, and with it they gain potent magical abilities. Sometimes when an Undine Dragon becomes very upset, the ground at their feet may frost over or begin to steam. They have also been observed to manipulate water directly, rerouting raindrops or creating puddles from groundwater. Undine Dragons always live near forest pools, streams, or waterfalls. Both genders take equal part in the raising of young and are very good parents—though they may not remain mated after the offspring are grown.

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.

Sexy isn't that sexy. The ladies think he's weird and has a dumb name. He doesn't care. Rather than dwell on his appearance and name and other silly things, he enjoys life. His favorite pastime is playing Get the Ball in the Other Team's Goal by Mostly Kicking It Game with the resident sophrosynes. (The spirits don't care for team sports at all, so he doesn't bother them.) Sexy is the Player in Front of the Goal Who Keeps the Ball from Being Scored, a specialized but important position. He had no experience in the beginning, but he learned the rules and maneuvers very quickly. Nowadays, even if his team aren't defending well during a match, Sexy can block or catch almost every attempt to move the ball into his goal. They say they doubted his goal-defending in the beginning, but he's definitely a keeper.