All the Light We Cannot See: Foil 1 key example

Werner and Marie-Laure are, in effect, false foils: they give the appearance of dissimilarity, but their respective life stories and experiences align rather than separate them from one another. Werner begins the novel as an orphan and Marie-Laure does not, but by the end of the novel, wartime equalizes their circumstances and strips them both of their human support systems, leaving them to momentarily depend on one another for survival. Werner can see, but what he sees is uninspiring at best and traumatizing at worst, so he must look to "see" through radio waves, just as Marie-Laure uses her other senses and imagination to "see" for her. Werner is German and Marie-Laure is French, but this ends up not being an appreciable difference because in the end, both are human beings. This is enough, and should be enough, to connect them to one another.