Here is the answer of the given questions above. The images that make the setting of the confrontation between Gawain and the Green Knight that seem demonic is that, his house is hideous and covered in grass. Here is an example from the story. "He put his spurs to Gringolet, plunged down the path, Shoved through the heavy thicket grown up by the woods And rode down the steep slope to the floor of the valley." The steep slope to the floor of the valley sounds like he's going down to hell. Hope this helps.
