Zelda's insight allows Link to physically modify any physical quality with that of a different absorbed person.

In fact, using Zelda's magical insight and Triforce of Wisdom, Link realized she could actually modify herself using any of the body parts of people she had absorbed. Looking down at herself, Link thought about what she could do to this body. One of Janus's victim's was a stripper, Yennifer, with platinum blonde hair and the largest pair of breasts Link had ever seen. There was another, a noblewoman, Theatra, who had red hair, a sharp temper, and an ass more wonderful than Link could imagine. And there the original Janus, a thin and athletic man with a large, thick cock.