Sergius Saranoff (Arms and the Man) is an idealized version of what a hero should be as far as Raina and her mother. He is trapped by their image of him and tries to live up to it. But it is impossible to live up to an archetype Shaw uses this character to show how these perceptions that we have of others is very unrealistic and unfair. It is when he is with Louka that he realizes that there is more depth of character to himself than the romanticized version. When he makes the decision to follow his heart and be with Louka he is maturing and obtaining a real world vision of who he could be.