Dwarves are not much different from regular humans, and their distinguishing feature seems to be their short height, red beards and large battered-looking noses. They share the common characteristics of dwarves in other works of high-fantasy, having a fascination for the mining and forging trade. Also, they do not appear to have the equivalent of a female among their population, which is also true of other fictitious dwarven races.
They describe themselves as settlers from the Northern Reaches, and that they happened upon the ruins and the cannon while in search of valuable ores. While they are from the region the Mars Clan was based in, it is not seen as very plausible that the dwarves are direct descendants of them.