Mutamore Dragons are a mostly solitary breed, preferring to be alone in the waterways of the world for most of the year. However, when winter begins to wane, these normally grouchy dragons undergo a massive personality shift and become excessively chipper and incredibly social with the solitary focus of pairing up themselves—and other—dragons. They become such annoyingly happy and persistent match-makers that other dragons have been known to pretend to be pairs when one is in the area, just to avoid the attentions of the Mutamore Dragons. This temporary pairing up tends to lead otherwise disinterested dragons into a better appreciation of one another, resulting in lasting relationships. This has given the Mutamores the false reputation of being good at match-making.

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.

This dragon is the first mutamore to move to Oscar Delta, and although people don't know what "Radiometric" means, they know "Dating" and don't like the sound of it. When he first arrived, he introduced himself as a history enthusiast who's gotten a few essays published back in his home region, but whenever someone visits him to discuss historical events, he reacts with grumpiness and sends them away. In the three instances he did not immediately tell visitors to leave him alone, he could tell they were unmated and quickly, smoothly segued out of the topic of the Coup of Sierra, Cocoa Rock Rampage, and beginnings of the Legion of the Suns (respectively) to effuse about these individuals' romantic prospects. Due to word of Radiometric Dating's unpleasant behavior spreading, every single dragon of Oscar Delta now avoids him. The taken dragons and the widow(er)s still sometimes seek him out for information, and many of them have figured out how to convince him to discuss with them.