How to Write Fanfiction That Stays in Character

Fanfiction borrows the characters and world of a story you love to tell the story you wish you could read. This guide takes you from your first notes on a character to a finished fic, in six steps, with one goal running through all of them: keeping characters in character.

The examples use a web novel we wrote in TypeTak's Write a Web Novel, Step by Step course, They Say I'm a Dark Mage, but All I'm Good At Is Digging Dirt, as the canon. Clay, a commoner with almost no mana, gets mistaken for a dark mage because an ancient judging stone can't pronounce “earth magic” properly.

Fanfic terms you'll see

• Canon: what the original work actually establishes.
• Fanon: details fans have repeated so often that they feel like canon, even though they aren't.
• OOC (out of character): a character speaking or acting in a way that doesn't fit who they are in canon. Readers notice it before anything else.
• AU (alternate universe): the same characters dropped into a different world, like a modern coffee shop or a college campus.
• Tropes: familiar story patterns readers search for, like slow burn, enemies to lovers, or hurt/comfort.

1. Start with a character notes page

Readers notice “She'd never say that” long before they notice clumsy prose. So before you write, make one page of notes per character. Later, you'll check every scene against it.

Here's the page for Seraphine, the dark magic professor:

The last row matters most. A reading of a character with no scene behind it might just be what you want them to be. Find the scene and write it down, and you'll have something to come back to when your interpretation wobbles.

2. Write down the scenes you want to see

Once your notes are in place, list the scenes you wished canon had shown you. Don't worry about order or logic yet.

• Seraphine seeing Clay's earth magic with her own eyes for the first time
• Mia, the friend who knows the truth, deciding whether to say it out loud
• Lucian, the rival, quietly trying to dig in the dirt himself

Collecting scenes first keeps you excited longer than starting from an outline. With three or four scenes on the list, you can usually see what has to happen between them. Ask yourself:

• What happens to the characters?
• How would they react, going by your notes?
• How have their situation or relationships changed by the end?

3. Decide where you branch from canon

How you write a scene depends on how it relates to canon. Pick one before you start.

• Canon-compliant: keep canon's events and lore, and write in the gaps canon never showed. Watch that you don't contradict the order of canon events.
• Canon divergence: one moment in canon goes differently. “What if the stone had pronounced earth correctly?” Name that moment up front.
• AU: keep only the characters and move them somewhere new. The world changes. Their voice and values from your notes don't.

Tag divergence and AU fics clearly. Then readers won't mistake a deliberate change for OOC writing.

4. Keep your first fic small

Plenty of fics start with a burst of energy and stop halfway. Size your first one so you can finish it.

• Two main characters. More characters means more voices to track and more notes to keep.
• A one-shot, or about five chapters at most. Picking just one scene from step 2 can be enough for a whole fic.
• A posting schedule you can keep. Updating every two weeks without fail builds more trust than promising weekly and going quiet.

5. Check your draft against your notes

When the draft is done, put your notes next to it before you start polishing, and ask:

1. Do their lines sound like their Voice row?
2. When something hits them, do they react the way the Under pressure row says?
3. Are they doing anything from the Never row?
4. If you're writing canon-compliant, does anything contradict the order of canon events?
5. If a character changes, does the scene show why?

Say you wrote Seraphine's big moment like this:

Seraphine's eyes went wide. “Oh, so it really was earth magic. My mistake.”

It reads fine, but it breaks her Never row. The moment she admits the mistake, the joke that drives the whole story is gone. Rewritten to fit the notes:

Seraphine stared at his dirt-covered hands for a long moment. “You breathed life into soil. I'm looking at the oldest form of dark magic there is.”

Maybe you want a character to grow past who they were in canon. That's where question 5 comes in. Show the reason inside the story, and readers will read it as change, not OOC.

For a fuller checklist, What Does OOC Mean in Fanfiction? walks through 10 questions and a scene fixed step by step.

6. Post it and keep going

AO3, Wattpad, and FanFiction.net are the usual places to post. Wherever you go:

• Tag the fandom, characters, relationships, and tropes. Tags are how readers find fics on AO3, and canon divergence or AU tags tell them what to expect.
• Warn for violence and mature content. Each site has its own ratings and warnings, so check them before you post.
• If AI wrote any of the text, check the site's rules on AI-generated work. They differ from site to site, and many readers care.
• Consider a beta reader, someone who reads before you post. A fellow fan of the same canon will catch OOC moments you can't see in your own writing.

Common mistakes

• Letting an original character take over. Readers came for the canon characters. If your OC steals every scene, they'll lose interest.
• Plot turns with no setup. The further you stray from canon, the more you need to show why things happen.
• Writing about real people carelessly. Fics about real people can affect their reputations and lead to disputes. Check the site's rules first.
• Worrying about your prose first. In a first fic, readers want the character they love more than polished sentences. Get the character right and the prose improves as you revise.

Writing fanfic in character with TypeTak

TypeTak is an AI writing editor where you write alongside an agent. Of the six steps above, it helps most with keeping your character notes honest.

• Your character notes in one place. Keep each character's voice, values, and evidence scenes in your World. The agent reads it before answering, so when you ask “What would Seraphine say here?”, it answers from your notes.
• A second check against your notes. In the editor toolbar, open the menu next to Proofreading and click Feedback. Along with the draft's strengths and weaknesses, it flags anything that contradicts the lore in your World. Save checks you run often as Skills and call them up again.

• Fix sentences right where they are. At the sentence under your cursor, open Enhance and pick an action like Imagery boost or Inner voice, or get other wordings of the same sentence with Rephrase.

TypeTak helps with writing you do yourself. What to write and how to read your characters stays your call.

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