Who is Mark Anders from A Sparrow Falls and what is their importance?

Mark Anders is a volunteer in the French army, Mark Anders is well known throughout the area for his prowess with a rifle. He moves with certain grace not unlike that of an athlete and is younger than his partner, Sergeant Fergus MacDonald. Mark eyes are serene and pale golden brown, with lids that do not overlap the iris, leaving the cornea floating clean and white like a full moon. His gaze is direct and hypnotic, despite his age, which is nearer to seventeen than twenty.