In her human form, Quetzalcoatl is a tall, fair-skinned woman with an hourglass figure and large breasts. She has long, wavy blonde hair, in the anime her hair takes on a turquoise and green color at the ends. She has heterochromia, where one iris has a different coloration from the other. Her left eye is navy blue on the outside and yellow on the inside, with a green, slit pupil. Her right eye is green on the outside with designs and black on the inside with a yellow, slit pupil. Although she tends to keep her eyes closed most of the time.