Marr is a narrow, long-limbed Grimling whose movements are quiet without being graceful, as if every step has been considered by a committee. His charcoal skin has a dry, velvety texture, broken by faint silver flecks around his knuckles that resemble ground bone. His jaw is broad and unusually powerful, and when he smiles, which is rare, his small square teeth show in two perfectly even rows. Before speaking, he takes a soft, deliberate breath through his nose and taps his lower teeth once with his tongue, creating a tiny click that people often remember more clearly than his words. He carries himself like a solemn court official, yet he has the unexpectedly gentle habit of crouching to speak with children and animals at eye level. His presence leaves the impression of a sealed tomb that has somehow learned patience.