Bright-Breasted Wyverns are a breed of dragon easily recognized by their bright red markings. They are a small breed, only the size of a full-grown man. However, they have developed poisonous barbs on their feet to make up for their size. Their coloration is used to warn off potential predators of the danger, and is also used to attract mates. They are very social, and can often be seen preening in large groups.

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.

Eisenberg is highly sociable, enjoys traveling, and does every job or little task he's given without complaint. He's confident and bubbly, though he lacks self-awareness at times. He enjoys going to gatherings with acquaintances to make more acquaintances. Some people announce themselves as "X, daughter of Y" or "X, heir of Some Place and descendant of So-and-So". Eisenberg takes that a step further by happily sharing the fine details of his ancestry. According to a well-preserved scroll which he whips out uninvited, he is some part nebula, some part bolt, 2.5 percent witchlight, .02 percent lacula, yadda yadda what-have-you. He enjoys talking about his background and family tree, seemingly unaware that others find it dreadfully boring and think he'd be more interesting if he talked about something else.