Mercer is tall, with a burly and muscular build, with broad shoulders. She has blonde, almost white hair that's cropped short, and dark brown eyes that are almost black like charcoal. She was scars littering her body, but none are as prominent as the one running across her neck and the one running a cross her face, below her eyes and over her nose. Mercer is a sadistic woman who enjoys seeing people in pain and causing pain to others, and is never remorseful.