Many authors are not aware that a Protagonist does not have to be the Main Character. When we stop to think about it, many examples come to mind of stories in which we experience the story through the eyes of a character other than a Protagonist. Yet when it comes to writing our own stories, many of us never diverge from a Protagonist/Main combination.
There is nothing wrong with this combination. In fact, as long as both characters are represented in the single player, such a blend is a fine Archetypal Character. The point is: there are other ways.
Subjective Characters range from the Main Character with whom we identify to all the “other soldiers in the trenches” around us as we experience the battle together. They are friends and foes, mentors and acolytes. We see in them characteristics of Worry, Instinct, Experience and Doubt. Rather than functioning as approaches the way the Objective Characters appear to do, the Subjective Characters function as attitudes.
From the Dramatica Theory Book