In their original form they can be of any race, but some characteristics are similar, such as a thin, wiry build, or small and darting eyes. Once in hybrid form they are slightly shorter. The head, torso, and tail are identical to those of a rat, while the limbs remain humanoid.
Packs of regular mice or rats are naturally drawn to them, but are not controlled in any way.
Wererats have a keen sense of smell and can detect or even identify individuals just by using their nose. Additionaly, the Curse provides certain natural enhancements, such as instant healing against wounds from ordinary weapons. Only silver arms and magic can hurt them.
Although the ratmen can be formidable opponents even to seasoned soldiers, they are easily frightened and can be psychologically subdued. Their nature is that of a vengeful survivor though, and a small victory does not mean the wererat will never visit again.