Six is much smaller than the adult characters of the series, being barely a third of their height with an extremely small, thin frame. She wears a bright yellow raincoat that ends just above her knees with three buttons, two pockets, and a rhombus-shaped hood. Up close, she has messy black bob-cut hair with long bangs that completely obscure the top half of her face, only revealing her pointed chin and tiny nose and mouth. Her feet and hands are bare. Her only possession is a zippo lighter.