Physically, Viserys is “a gaunt young man with nervous hands [they are later described as shaking when he gets emotional] and a feverish look in his pale violet eyes.” He has silver-blond hair which is long enough to be pulled back and fastened behind his head.
I #love the way this chapter conveys Viserys’ paranoia, and Illyrio’s indulgence and encouragement of it:
Her brother would not allow [them to stay long in any one place]. The Usurper’s hired knives were close behind them, he insisted, though Dany had never seen one.
“…And the smallfolk will be with us. They cry out for their king.” He looked at Illyrio anxiously. “They do, don’t they?”