A set designer builds a set that will support the story. If the play deals with issues of status, the set designer may create a set with different levels. Perhaps the king will stand on the higher levels, making other characters look up to him. Or in a play like King Lear, he might stand on the lower levels, as Lear's daughters ignore and make a fool of him.
How does your character's environment define him? Is he stuck in a small room throughout most of the story? Does he accept this or rebel against it, literally or figuratively bouncing off the walls? Does she revel in the great outdoors or is she more comfortable in the prim drawing room? Does she seek to conquer the land or to lose herself in a maze of streets?