Natsume is a tall man seemingly in his fifties who always wears a bowler hat, a British-looking, long, brown suit with grey turtleneck shirt underneath, and brown gloves. He is always seen holding a T-shaped cane. He also has a thin mustache and his hair color matches his fur when in cat form: a light chestnut strand of hair hides the right side of his face, the hair above his neck is white and the rest is dark brown. His eyes are of a brownish-golden color.