Who is Robert Childan from The Man in the High Castle and what is their importance?

Robert Childan is the owner of the American Artistic Handcrafts shop. Childan specializes in authentic American artifacts for the Japanese. Childan is deeply concerned with pleasing the Japanese, often going out of his way to find objects for his clients. When Childan befriends a young Japanese couple, he goes out of his way to do and say things he believes they will like. In fact, Childan perhaps offends this couple by trying to be so pleasing. Childan loses his own opinions and feelings in his quest please the Japanese.