The Main vs. Impact character who changes his approach or attitude in a story
The Change Character is the single character who does change in a story in an attempt to resolve his personal problem. The Change Character must be either the Main Character or the Impact Character but cannot be both. A Change Character cannot tell until the end of the story whether or not he will change, and even then, a Change Character has no way of knowing whether or not changing will lead to success or to resolving his personal problem. However, in every story, either the Main Character or the Impact Character will Change in response to the other's Steadfastness and become that story's Change Character.