# How to Write Fanfiction: A Craft Guide for First Fics URL: https://koroverse.app/journal/how-to-write-fanfiction Type: blog Locale: en Published: 2026-10-02 Updated: 2026-10-02 --- > A practical craft guide to how to write fanfiction: choose a story shape, keep characters true to canon, handle lore, and publish your first fic. How to write fanfiction comes down to this: pick one small story inside a world you already know well, study how the source speaks and behaves, draft a single scene or short piece in that voice, and publish it before you polish it to death. The craft is the same as original fiction with one extra constraint: canon is a promise to the reader, and every inconsistency breaks it. Everything below is about keeping that promise while still writing something that is yours. ## What are you actually writing: a missing scene, an alternate universe, or a continuation? Most first fics stall because the writer never decided what kind of story they were telling. Three shapes cover almost everything. A **missing scene** fills a gap canon skipped: the conversation after the finale, the night before the battle. It is the cheapest form to finish and the best classroom, because the world is already built and you only have to hit the voices. An **alternate universe** (AU) keeps the characters and changes the setting or one fact. The coffee shop AU is the famous one, but the stronger AUs change a single causal link and follow it honestly. They ask for more worldbuilding than writers expect, since you now own the rules canon used to supply. A **continuation** picks up where canon ended. It is the riskiest, because you inherit the whole weight of the original's pacing and promises, and readers will measure you against it chapter by chapter. Skip the sprawling twenty-chapter epic as a first project. It is the most common way to abandon a draft at chapter three. Pick the missing scene. Finish it. Then decide whether the idea wants to grow. ![Notebook with character notes beside pens, tea and an open paperback](https://fdzlnqpwsaniezitwiuw.supabase.co/storage/v1/object/public/cms-media/koroverse/2026-10/220d80-i1.webp) ## How do you study canon so the characters sound like themselves? Reread the source the way an editor would, not the way a fan does. You are no longer looking for what happens. You are looking for how it is made. Keep a one-page cheat sheet per major character. Four lines are enough: how they speak (sentence length, slang, what they never say), what they want right now, what they refuse to do, and one physical habit. When a line of your dialogue feels off, the sheet usually tells you why. Most out-of-character writing comes from not knowing the character well enough, not from a lack of talent. Then do the test that actually works. Cover the speaker tags on a page of your dialogue and ask whether a reader who knows canon could tell who is talking. If every character answers in the same polite, articulate paragraphs, the fic has a voice problem, and no amount of plot will fix it. Pay attention to the world's rules as well as its people. If magic costs something in canon, your characters cannot casually ignore the cost on page two because the scene is easier that way. Here's how it holds up at the table: a game master who lets a rule bend once will be asked to bend it forever, and a fic that does the same teaches the reader to stop trusting it. ## Where does the plot come from if the world is already built? Canon gives you setting and cast. It does not give you a story. A story needs a character who wants something, an obstacle that costs them, and a choice that changes them, and borrowed names do none of that work. Start from the ending. Decide the last image or the last line, then work backward to the scene that makes it land. You do not need the whole middle mapped, only the first scene and the final beat, because the middle tends to reveal itself once the characters start talking. Then ask the question the best fanfiction always answers: what does canon refuse to show? The grief a stoic character never voices. The consequence of a victory nobody counted. The minor character whose life has been running in the margins for ten books. A fic that illuminates a blind spot gives readers something the original could not, and that is the real reason people read fanfiction instead of rereading the source. Do not retell canon with the names filed off or the dialogue lightly reworded. A reader who knows the source will feel the lack of surprise within a paragraph. ## Do you need to build lore, or only borrow it? It depends on the shape you chose. A missing scene borrows nearly everything. An AU or a crossover needs you to make decisions canon never had to make: who holds power, what things cost, how people travel, what everyone believes about the gods. Treat those decisions the way a campaign setting treats them. Write the answers down once, in a plain document, and consult it every time you add a detail. Call it your Codex if you like. The name matters less than the habit, because contradictions you introduce yourself are the ones readers catch first. One fic I would point newcomers to changed exactly one fact about its source, a treaty that failed to happen, and spent forty thousand words following the consequences with no shortcuts. That discipline is what separated it from the hundred other AUs in the same tag. ![Two wooden chess pieces facing each other on a world map, one subtly different](https://fdzlnqpwsaniezitwiuw.supabase.co/storage/v1/object/public/cms-media/koroverse/2026-10/049220-i2.webp) ## How should you handle the first draft? Write the draft fast and badly on purpose. The goal of a first pass is to get the scene out of your head and onto the page, so that you have something to edit instead of something to imagine. Set a modest daily number and keep it modest. Five hundred words a day for two weeks is a finished short fic. Two thousand words for three days followed by a month of silence is not. Open in the middle of a moment, not with a definition or a recap of canon. Your readers already know the source. A first line that starts mid-argument or mid-escape respects them and tells them the voice is right within seconds. Keep the sensory detail specific. Cold tea, the scrape of a chair, a character straightening a collar before bad news. Specific beats lavish every time, and it is also the quickest way to make a borrowed world feel inhabited rather than quoted. Save the polish for the second pass. When you get there, read the dialogue aloud, cut the opening paragraph (it is almost always throat-clearing), and check every named rule against your notes. ## What about AI tools, and where does the line sit? A lot of newcomers ask whether AI can write the fic for them. It can produce words. It cannot make the choices that make those words yours, and it will happily generate a scene that quietly breaks a canon rule because it does not know which rules matter to you. Used with restraint, the tools are useful at the edges: brainstorming what-if premises, drafting a timeline for an AU, summarizing your own notes, or reading a chapter back and flagging where a character's phrasing drifted. What the draft actually contains, and what stays out, is your decision. The assistant should never be the author. Check the norms of the community where you plan to post, too, since many archives and fandoms have explicit rules about AI-generated text and expect you to disclose it. Reality check: the writers who get the most from these tools already know their canon cold. A tool that has no sense of your fandom cannot compensate for a writer who does not either. ## Where do you publish, and how do you tag it? Choose a home before you finish. Archive of Our Own, FanFiction.net and Wattpad all work differently, with different tag systems, different readerships and different norms about content ratings. Read a few popular fics there first and notice how authors summarize, rate and tag their work. Tag honestly and precisely. Fandom, characters and relationships, major tropes, content warnings where the platform or the story calls for them. Honest tags bring the readers who will actually enjoy the piece, and they spare everyone else a bad surprise. Respect the line between homage and copying. Fanfiction thrives on transformation: new scenes, new angles, new questions. Reproducing large chunks of someone else's text is not transformation, and it is the fastest way to lose a community's goodwill. If you want a primer on norms and etiquette, the [Booktrust beginner's guide to fan fiction](https://www.booktrust.org.uk/resources/find-resources/writing-fan-fiction-a-beginners-guide/) is a clear place to start, and [Book Riot's walkthrough](https://bookriot.com/how-to-write-fan-fiction/) covers the practical first steps. ![A writer typing a draft by candlelight on a rainy evening](https://fdzlnqpwsaniezitwiuw.supabase.co/storage/v1/object/public/cms-media/koroverse/2026-10/cf366d-i3.webp) ## How do you handle feedback and keep going? Post a short piece first and take the comments as data, not verdicts. A reader who says a character felt wrong has told you something useful even if they cannot explain it. A reader who says they loved one particular line has told you what your strength is. Do not chase every suggestion. The most common failure after the first review is rewriting the story to please three strangers and losing what made it yours. The second fic is where the craft starts to compound. You will already know your own habits: where you rush endings, which character you write best, what you overexplain. Build on those, and write something slightly longer than the last one. ## What does a first fic teach you about your own world? Writing inside someone else's universe is the cleanest apprenticeship in worldbuilding there is. You learn what makes a setting hold together by trying not to break it, you learn how a voice is built by matching one, and you learn what a promise to a reader costs. When you eventually build a world of your own, you will carry that instinct with you: a realm earns belief through consistent rules and specific detail, not through scale. So start small, stay faithful to what you borrowed, change one thing honestly, and ask yourself at the end which part of the story only you could have written. ## FAQ ### How do I start writing fanfiction? Pick a fandom you know deeply, then choose one small story: a missing scene, a short alternate ending, or a single conversation. Study how the characters speak, write a rough draft quickly, and post it once it is finished. ### How long should a first fanfic be? Short is better. A piece of 1,000 to 3,000 words is easy to finish and teaches the same craft as a novel-length work. Finish that before committing to a multi-chapter project. ### How do I keep characters in character? Make a one-page cheat sheet per character covering how they speak, what they want, what they refuse to do, and a physical habit. Check your dialogue against it, and cover the speaker tags to see if each voice is still distinct. ### Do I need to build my own world for a fanfic? Not for a missing scene, since canon supplies the world. For an alternate universe or crossover you do. Write down the new rules once and consult them so you do not contradict yourself. ### Can I use AI to write fanfiction? You can use it for brainstorming, timelines or consistency checks, but the choices and the prose should stay yours. Many archives and fandoms have rules about AI-generated text, so check the norms before you post. ### Where should I publish my fanfiction? Archive of Our Own, FanFiction.net and Wattpad are the common choices. Each has its own tagging system and norms, so read popular fics there first and tag your work honestly.