Luke is a handsome, middle-aged snow leopard of average height and a slender build. He has thick light gray fur with a pattern of elongated black spots on his face and neck, with two linear patterns of spots under his eyes and two connecting linear patterns on the top of his head that seems to emulate a "widow's peak". He has elongated, rectangular eyes with small black irises and thick black eyebrows. His ears are long and rounded with black edges.