Duilliath, like most members of the Aos Sidhe, has a native form that is generally human or elf-like, but to a greater degree of height and striking appearance. The Aescbourne known as Duilliath, as one of the Children of the Aesc, is very tall, long of limb, and whipcord lean. his dark ruddy brown hair, the color of mahogany, is worn long, usually braided or at least gathered to prevent it from obscuring his vision.
He has pleasant, angular features, with high cheekbones and an expressive mouth usually set in a wry or sardonic smile. His skin is smooth, with a hint of fine lines about his eyes. His gaze is considered 'unsettling', partly for the color of his eyes, but also for the thousand meter stare he has, as he observes and analyzes the multitude of layers he sees. His eyes, unusually for one of the Sidhe, are very dark, chips of obsidian that appear to make his eye seem pupilless. The dark orbs, when they are fixed on another, can be very discomfiting.
He typically dresses for the road, in serviceable riding or walking clothes, dark brown or grey trews with a dove-grey or manila linen shirt; a diagonal sash in grey, green, heather and blue in the tartan of his Kith fastened by a Sidhe-silver claiomh brooch crosses his chest from left to right and a cross-chest sword belt or dark leather crosses from right to left.
He wears a variety of rings, but about his neck is the twisted Sidhe-silver of a torc. At his breast, a deep green prism of uncertain manufacture is occasionally visible.
He carries a variety of weapons as the situation demands: a few knives, a short sword, a horsebow made of composited strips of bone and aesc wood, and a long, broad-bladed spear.
He is often seen in the company of a variety of animals, including a black and white cat or crow.
Duilliath Suilleach Seanake, Fool and the Traveler Who Lost a Kingdom