Corwin doesn’t give nearly as much description of his sisters as he does his brothers, though this is a function of their reduced screentime in the books. Fiona, although the most active of the Princesses of Amber, does not appear until book 3:
Fiona-five-two, perhaps, in height-green eyes fixed on Flora’s own blue as they spoke, there beside the fireplace, hair more than compensating for the vacant hearth, smoldering, reminded me, as always, of something from which the artist had just drawn back, setting aside his tools, questions slowly forming behind his smile. The place at the base of her throat where his thumb had notched the collarbone always drew my eyes as the mark of a master craftsman, especially when she raised her head, quizzical or imperious, to regard us taller others. She smiled faintly, just then, doubtless aware of my gaze, an almost clairvoyant faculty the acceptance of which has never deprived of its ability to disconcert.