Who is Jeanne and Maurice Michaud and Jean-Marie Michaud from Suite Franaise and what is their importance?

Jeanne and Maurice Michaud are married and happily in love. They are likely the most stable family presented in the novel. Both are employed by Monsieur Corbin's bank, in jobs which they are afraid to lose. They live a simple life spend most of the novel watching for the return of their son, Jeanne-Marie, who was injured in the war.