Making the world better, one answer at a time. The word foil in drama means a character or scene that is set up as a contrast to another so that each will stand out vividly.. Hope that helped.
Typically, a comforter is a thick, quilted, fluffy blanket that is used to keep you warm. It is usually filled with synthetic fiber filler which is quilted or stitched to secure the filling and keep it evenly distributed. Unlike a duvet, the comforter only forms one piece of all of your bed linens.
Both comforters and duvets are used to keep warm. What they are called and how they are placed on a bed, exactly, varies by region. In the U.S., a comforter is placed atop bedsheets and sometimes atop other thin covers (e.g., an electric blanket, quilt, or a bedspread, which is a very thin blanket).