Who is Bayard from Incident at Vichy: A Play and what is their importance?

Bayard is a twenty-five-year-old electrician. He chides Lebeau for his nerves, insisting the interrogations are routine identity checks. Bayard is an outspoken Communist, who tells the other detainees about the trains filled with Jews that are taken to concentration camps in Poland. He is the third detainee to be interrogated; he is not released.