Screenwriting guide
Character Arc: Positive, Negative and Flat
A character arc is the inner change a character goes through over the story. In a positive arc they trade a false belief, the lie, for the truth. In a negative arc they cling to the lie or fall further. In a flat arc they already hold the truth and change the world around them instead.
Written and reviewed by ScriptLix Editorial
What does a positive character arc look like, act by act?
An original story, The Lighthouse Shift, written for this page. A coast guard radio operator who trusts no one must talk a stranded teenager through a night at sea, using only her voice.
- Want
- To get through her last night shift and transfer inland, alone.
- Need
- To let someone depend on her, and to depend on someone back.
- Lie
- If you rely on people, they will let you down.
- Truth
- Trust is a choice you make, not a promise you are owed.
Act One
Nadia turns down the relief operator who offers to stay. Her logbook is perfect and her desk has one chair.
Inciting incident
A mayday from a teenager alone on a drifting dinghy. The relief operator has already gone home.
Act Two
She runs the rescue by the book and keeps the boy calm with rules. When the rescue boat is delayed, she lies to him to stop him panicking.
Midpoint
He catches the lie and stops answering. She realises he will only hold on if she tells him the truth about how bad it is.
Act Three
She calls back the relief operator for help and tells the boy everything. He trusts her steering by the stars. At dawn she tears up her transfer form.
Place the turns on your page count with the three act structure calculator, set up the opposition in protagonist vs antagonist, and find the wound behind the lie with the character backstory generator.
How to use it
- 1
Name the lie your character believes at the start, in one sentence.
- 2
Name the truth that would set them free, and the want that keeps them from seeing it.
- 3
In Act One, show the lie working for them, and the cost they ignore.
- 4
In Act Two, test the lie with rising pressure until the midpoint shows them the truth.
- 5
In Act Three, force a choice between the want and the need, and let the choice prove the change.
A character arc mapped onto the three acts
| Act | Positive arc | Negative arc | Flat arc |
|---|---|---|---|
| Act One | Believes the lie; it seems to work | Holds a truth or a fragile lie | Already holds the truth; the world believes a lie |
| Inciting incident | A problem the lie cannot solve | A temptation or a threat | The world’s lie threatens someone |
| Act Two, first half | Chases the want using the lie | Starts trading the truth for the want | Is tested and doubted |
| Midpoint | Glimpses the truth | Chooses the lie knowingly | Restates the truth at a cost |
| Act Two, second half | Fights between lie and truth | Wins in ways that cost them | Loses ground; allies waver |
| Act Three | Chooses the truth and acts on it | Destroyed or hollowed by the lie | The world, or one person, changes |
What is a character arc?
It is the path of change a character travels between the first page and the last. The plot is what happens; the arc is what those events do to the person they happen to. A good arc makes the climax feel inevitable, because the final choice is one the character could not have made on page 1.
Not every character needs an arc. The protagonist usually has one; supporting characters may have small ones or none. What matters is that the change, or the refusal to change, is the point of the story.
What are the types of character arc?
Positive, or change arc: the character starts with a false belief and ends with a truer one, and is better off for it. This is the most common arc in mainstream film.
Negative arc: the character ends worse. They may fall from a truth into a lie (corruption), trade one lie for a worse one (disillusionment), or refuse the truth when it is offered and pay for it. Tragedy runs on negative arcs.
Flat, or steadfast arc: the character already knows the truth and does not need to change. Instead, they are tested by a world that believes a lie, and their steadiness changes others. Many action heroes and mentors in ensemble stories work this way.
What is the difference between want and need?
The want is the outer goal the character consciously chases: the job, the trophy, the person, the escape. The need is the inner change that would actually make them whole, and it is usually something they cannot see at the start. The arc is the story of the gap between the two closing.
In a positive arc the character often gives up the want, or gets it in a changed form, because they finally choose the need. In a negative arc they grab the want and lose the need for good.
What is the lie your character believes?
The lie is a mistaken belief about themselves or the world that shapes every choice they make: I am only worth what I achieve; people always leave; if I stop controlling things they fall apart. It usually comes from a wound in their past. The truth is its opposite, and the arc is the slow, costly trade of one for the other.
K.M. Weiland’s Creating Character Arcs is a useful book on this lie and truth model, and on mapping it to structure. You do not need the vocabulary to use the idea: ask what your hero believes that is wrong, and design the plot to break it.
How do you show a character arc on screen?
Through choices, not speeches. Show the lie in action early with a small choice the character makes because of it. Then near the end, put them in a similar situation and let them choose differently. The audience feels the arc by comparing the two moments, without anyone stating the lesson.
Mirror scenes, a repeated line or prop, and the opening and final images are all ways to make that comparison clear.
What are common character arc mistakes?
Changing too early, so Act Two has nowhere to go. Changing off screen, or in a single speech. An arc unconnected to the plot, so the inner change does not help win the outer fight. And a lie too vague to test: a character who is simply sad or closed off gives the plot nothing to push against.
Questions writers ask
What is a character arc in simple terms?
How a character changes, or fails to change, from the start of the story to the end.
Does every character need an arc?
No. The protagonist usually has one, and a few supporting characters may. Many side characters stay the same so the hero’s change stands out.
What is a flat character arc?
An arc where the character already holds the truth and stays steady, and the people or world around them change instead.
What is the difference between want and need?
The want is the outer goal the character chases. The need is the inner change they must make to be whole, often one they cannot see at first.
Where does the character change in a screenplay?
Usually the truth is glimpsed around the midpoint and fully chosen in Act Three, at or just before the climax.
Further reading
- From the blogHow to Create Unforgettable Screenplay CharactersHow to write screenplay characters that carry 110 pages: specificity over sentiment, want versus need, structural opposition, voice differentiation, and the arc that costs something.
- From the blog10 Best Character Arcs in Film (And the Turns That Earn Them)Michael Corleone, Andy Dufresne, Amy Dunne, Anton Ego. Ten unforgettable character arcs and the exact turning points that make each transformation land.
- From the blog9 Best Character Introductions in Film (and Why They Work)Nine unforgettable character introductions broken down scene by scene, with the exact move you can steal for your own script. Behavior over backstory.