Standing at 6 ft 6, Marento is pretty tall. He has medium long red hair, which, although he prefers to wear it loose, is usually tied back with a piece of string to keep it from getting in the way while on a mission or sparring with another. He has a rich bass voice, which is to be expected considering his height.

He has a muscular build, but not to the point of being wiry, and his skin is tanned due to his preference of being outdoors. However, he made sure not to neglect speed in favor of brute strength, and as a result can move surprisingly fast to the ones underestimating him due to his size.

His eyes are dark red, a family trait that springs up every couple of generations or so. He also has several scars on his body, reminding him not to be careless, although most have faded. He also has a small crimson tattoo, about two inches tall, on the side of his left upper arm, just below the shoulder.