Question: Could you please give example for impact character's and relationship's throughline? From Harry Potter's book or Huckleberry Finn maybe?Answer:
I've discussed Harry Potter's impact character (Voldemort) elsewhere, as well as given other examples. Basically, Voldemort represents the approach of putting of self-interest ahead of the good of others. He kills people in an attempt to make himself immortal. This is the opposite of Harry's approach, which is to risk his life to save other people, just as his parents died to save him.
For more details on the impact character and relationship throughlines in Harry Potter see...
I confess, it's been a while since I read Huckleberry Finn
, so some may disagree, but I believe the impact character is Jim. Both Jim and Huck are pursuing freedom, but while Huck does so through various false identities and deceptions, Jim cannot hide his identity as a black man which, in the setting of the story, automatically puts him in the role of a slave. Jim must establish his freedom by other means. Through his relationship with Jim, Huck learns to value people for who they are on the inside, their character, rather than their physical appearance.
I would have to re-read this book to do an analysis of the throughlines and signposts. However, the relationship throughline describes the evolving relationship between Huck and Jim. Huck initially sees Jim as a slave but by the end sees how wrong this designation is. The impact character's throughline would be the actions Jim takes that show Huck an alternate approach to deception.
Do keep in mind that neither Mark Twain nor J.K. Rowling (to the best of my knowledge) studied dramatica theory. Dramatica was developed by analyzing a wide array of stories to see what makes them work. But not every great story follows the model to the letter.