There are four throughlines in every story: the Main Character throughline, the Objective Story throughline, the Relationship Story throughline, and the Influence Character throughline. When a story is written, all four of these throughlines are represented in it from beginning to end by the particular events and characters pertaining to each throughline. As the story moves from describing the Main Character point of view., to the Objective Story, to the Influence Character, etc., the story's throughlines are woven together so that the audience can feel them all unfolding at the same time. For a story to be completely illustrated, each appreciation from each throughline has to appear somewhere in it.

The Main Character Throughline contains all the appreciations in a storyform which describe how the story is seen when it regards only the Main Character. It is the part of the story which is felt by the audience as being the first-person, "I" point of view of the story.

The Influence Character Throughline covers all the appreciations which describe the growth of the impact of the Influence Character. This is felt by the audience as the second person, "you" point of view in the story.

The Relationship Story Throughline covers all the appreciations which describe the growth of the RELATIONSHIP between the Main and the Influence Characters. This is felt by the audience as the shared, "we" perspective in the story.

The Objective Story Throughline covers all the appreciations which describe the growth of the story which involves all of the Objective Characters. It is the analytical view of the story which is felt by the audience as if they were standing outside of the story looking in at "them." It is the third person, "they" point of view OF the story.

Look in the Theory book under Storyforming and Main Character, there will be plenty of material on this.