Gwillan is a puffler that helps Elizabeth Pennykettle around the house. He is one of Liz's three special dragons - the others being Guinevere and Gawain. Gwillan fetches the post, warms tea, dusts, feeds the cat and generally helps around the house. He considers himself quite low down in the pecking order and leaves the workings of the universe to G'reth, Gadzooks and Gretel. In The Fire Eternal, the method of a puffler is further explained; a puffler dragon breathes in dust and burns dirt to ashes, then breathes in the ashes. A puffler deposits the ashes outside, and Gwillan does this into a potted plant.