Sin is a black robotic girl with a striking green light line traversing her body. She has white curly hair that conceals her eyes, sharp green teeth, black horns, and a black robotic tail that can shoot a laser beam from the tip. Sin is tomboyish, often dismissing orders and embracing a laid-back attitude. She won't hesitate to shoot a laser beam at anyone, even children, from her black robotic tail. Sin is belligerent and confrontational, she has a bit of a short fuse with people she hates.