Fumus has short two-toned hair - dark gray on top and blood red underneath. His eyes are grayish purple and have large bags under them. His outfit consists of a brown vest over a white dress shirt and dark brown pants with black dress shoes.

He is seen with a cigarette in all of his appearances. In specifically his official character portrait he is seen grasping a white mug, perhaps due to his enjoyment of coffee. Rarely, Fumus' eyes change color to the same shade of indigo as Satanick's.