Rhijans Thanus
While physically unimposing, there's a certain predatory air around him.  He'd pass for just another human, in a crowd, were it not for the dark gray skin that his race developed, but that, and his long black hair (almost always tied back) are his two most distinguishing physical traits.

A closer look shows cold, obsidian eyes that watch the world around him (whichever one that happens to be) with a pragmatic air, weighing the cost-for-effect of nearly every action he takes, a cold detachment that's developed from years of putting his life on the line.