Also known as arc
How a character changes — or meaningfully refuses to change — across the story, measured in choices under rising pressure.
Measure arc in choices under pressure, not in personality labels on a whiteboard. The finale decision should be difficult for the person who started the story and inevitable for the person forged in the middle. If anyone could make the ending choice on page one, you have a plot, not an arc yet.
Supporting roles can stay fixed on purpose when they are catalysts. What they still need is a clear want in each scene they enter. Flat ensembles often share one voice in dialogue -- a dialogue pass can surface sameness as reviewable markup, but only you decide which differences are intentional craft.
After a page-one rewrite, re-check arc against the new midpoint and ending before you polish lines. Continuity tools catch prop mistakes; arc craft asks whether knowledge, courage, or moral cost actually changed. Keep earlier drafts on save points so you can compare who the hero used to be on the page.
A protagonist who holds a truth the world must learn, changing others more than themselves. It still needs pressure and cost -- "unchanging" is not the same as "untested."
Change behavior: who they protect, what they refuse, what they risk. Let the final action contradict an early habit the audience remembers.
Not always. Many are escalating forces. If yours transforms, make the change visible in tactics and values, not only in a late confession.
Skills can flag voice sameness or tonal breaks as reviewable notes. Arc design stays yours -- nothing applies without accept, and analysis-first passes will not rewrite the ending for you.
