Sylvia is short, pretty Latino woman in her late thirties to mid-forties. She has dark brown hair and brown eyes.
Zee described her as having poor and proud written all over her and Mercy upon first meeting noted that her force of personality made her think Bran was fortunate she wasn't a werewolf or he risk disposition. She is very protective of her children as to be expected and does not react pleasantly to those who put them in danger.
Sylvia is a plain mundane human with the strength and speed that entails. She has the ability to stay calm in very stressful situations thanks to her job as police dispatcher.