Thalwynne possesses a radiant, ethereal beauty characterized by her waist-length chestnut hair that flows like a river of silk, often braided with living ivy and small white jasmine flowers. Her skin is a deep, sun-bronzed amber, dusted with freckles that look like gold leaf. She carries a persistent, warm smile that suggests she knows a delightful secret, yet her movement is disturbingly efficient and predatory, lacking the casual clumsiness of most humanoids. Even when standing still, she seems to vibrate with a kinetic energy, like a drawn bowstring.