Mole appears to be concerned with obeying the rules, staying safe and out of trouble. He doesn't seem to like being involved in conflicts, be it human or dragon. He also seems to care for his brother, as he and Raven keep Vole alive despite his reputation of tossing people into the abyss.
The Lost Continent Prophecy
In one of Snowfall's visions, Mole is seen urging Raven into one of the upper passages of the cave after he sees her teasing one of the dragons. He admonishes her for putting herself into danger while she says that it's funny to provoke the dragons. She wonders if them suddenly appearing in the caves is related to the abyss, but Mole shushes her for mentioning it. Persistent, she points out that it's behaving strangely, but Mole stays firm and tells her to leave him out of it if she plans on climbing down the pit.