Who is Kung Silor from The Clay Marble: And Related Readings and what is their importance?

Kung is the leader of a faction of the Cambodian army, fighting to free his country from the influence of the invading Vietnamese. When Sarun enlists, Kung is his commanding officer. Kung is also the officer whom Dara impulsively confronts about her need for food and her desire for a job, gaining more respect from him than her ambitious brother ever gets.