Who is Mr. Smith from The Last of the Menu Girls and what is their importance?

When Rocio takes a summer job at the local hospital, Mr. Smith, a small but kind man, becomes her boss. He is the head dietitian at the hospital, planning the daily menus that Rocio delivers to patients, who choose their meal components. Mr. Smith is proud of his work; ultimately, he determines that the regular aides can actually pass out the menus, and Rocio moves on to other work in the hospital. Mr. Smith loves tea and continually offers it to his workers.