Fanfiction Tropes
From slow burn romances to enemies-to-lovers, explore the themes and tropes that make fanfiction so compelling.
Alternate Universe (AU)
Stories set in a different universe or setting than canon, from coffee shops to space operas.
Angst
Stories focused on emotional pain, drama, and intense feelings.
Hurt/Comfort
One character is hurt (physically or emotionally) and another provides comfort and care.
Slow Burn
A romance that develops gradually over time, with tension building across chapters or the entire story.
Fluff
Light, happy, feel-good stories focused on sweet moments and happiness.
Friends to Lovers
Best friends who realize their feelings run deeper than friendship.
Romance
The broadest banner in fanfiction: stories where a relationship is the plot. Every flavor lives under it — slow burns and instant sparks, first kisses and fiftieth anniversaries — across every rating and every fandom on the archive.
Enemies to Lovers
Characters who start as adversaries and gradually develop romantic feelings for each other.
Pining
Unrequited or unspoken longing for someone, often with lots of internal anguish.
Fix-It
Stories that 'fix' canon events that fans found unsatisfying, usually character deaths or relationship outcomes.
Modern AU
Characters from historical or fantasy settings are placed in contemporary times with modern technology, jobs, and social situations. Classic dynamics in fresh contexts.
Secret Relationship
Characters are in a romantic relationship they must keep hidden from others for various reasons. The secrecy adds tension and stakes to their romance.
Protective
One character goes to great lengths to protect another from physical, emotional, or other harm. Protection can be obvious or secretive.
Forbidden Love
Romance between characters whose relationship is prohibited by society, law, family, or circumstances. Love persists despite impossible odds.
Mutual Pining
Both characters are in love with each other but believe their feelings are unrequited. Readers can see the truth while characters remain oblivious.
Humor
Fic written to make you laugh: crack premises played straight, group-chat chaos, banter-driven romcoms, and comedies of errors starring characters canon treats with deadly seriousness. One of AO3's biggest tags for good reason.
Only One Bed
Two characters are forced to share a bed due to circumstances beyond their control. The proximity and intimacy of the situation often leads to romantic tension or confessions.
Love Triangle
One character is torn between two potential romantic interests, creating tension and forcing difficult choices. Drama ensues as feelings are sorted out.
High School AU
Characters are reimagined as high school students dealing with teenage drama, first love, and coming-of-age experiences. Classic teen romance tropes apply.
Jealousy
Characters experience jealousy over real or perceived romantic rivals. The green-eyed monster drives conflict, realizations, and sometimes confessions.
Established Relationship
Characters are already in a romantic relationship at the story's start. Focus is on maintaining, deepening, or navigating challenges within existing love.
Childhood Friends
Characters who knew each other as children and have a deep, long-standing bond. Romance may develop as they grow up or reunite later in life.
College AU
Characters are college students or set in a university environment. Romance develops amid academic pressure, newfound freedom, and self-discovery.
Canon Divergence
The story follows canon faithfully up to a chosen moment, then branches: one different decision, one survived death, one secret told early, and everything downstream changes. One of AO3's largest tags, because almost every 'what if' is a divergence.
Domestic
Characters in everyday, intimate domestic situations like cooking together, sharing household chores, or quiet moments at home. Romance in ordinary life.
Soulmates
Stories featuring soulmate mechanics - marks, strings of fate, first words, etc.
Arranged Marriage
Characters enter a marriage arranged by others, often for political, financial, or family reasons. Romance may develop despite or because of the circumstances.
Vampire AU
Characters exist in a world where vampires are real, with at least one character being a vampire. Romance often explores immortality, bloodlust, and supernatural bonds.
Reunited
Characters who were separated by circumstances, time, or misunderstandings are brought back together. Old feelings resurface and new dynamics emerge.
Identity Reveal
A character's secret identity is revealed, whether they're a superhero, villain, supernatural being, or hiding their true self. Relationships are tested and transformed.
Second Chances
Former lovers or missed connections get another opportunity at romance. Past mistakes are confronted and love gets a chance to bloom again.
Werewolf AU
Characters exist in a world with werewolves, pack dynamics, and shapeshifting. Romance often involves mates, pack politics, or acceptance of one's dual nature.
Possessive
One character displays possessive behavior toward another, ranging from protective to controlling. Often explores themes of ownership, devotion, and boundaries.
Found Family
Characters forming family bonds with people they're not related to by blood.
Coffee Shop AU
Characters meet and develop relationships in the cozy setting of a coffee shop. One might be a barista, regular customer, or both just happen to frequent the same place.
Time Travel
Characters travel through time, either to change events, escape danger, or by accident. Romance may span different time periods or involve changing the past.
Touch Starved
A character has been deprived of physical affection and desperately craves touch. Simple gestures become incredibly meaningful and powerful.
Post-Canon
Set after the source material's final page or episode, these stories answer the question every finale leaves behind: and then what? Post-canon fic ranges from epilogue-adjacent vignettes to decades-spanning continuations that become fandom canon themselves.
Angst with a Happy Ending
One of AO3's most trusted tags: the story will hurt — sometimes brutally — but it promises in advance that the characters come out the other side. The contract lets writers go dark and readers follow without bracing for devastation.
Royalty AU
Characters are placed in a royal or aristocratic setting with kings, queens, princes, and nobles. Romance often crosses class boundaries or involves political intrigue.
Historical AU
Characters are placed in a specific historical period, often with period-appropriate clothing, customs, and social restrictions. Romance navigates historical constraints.
Accidental Marriage
Characters find themselves legally married through misunderstandings, drunken mistakes, or unusual circumstances. They must decide whether to annul or make it work.
Magic
Spellwork, enchantments, and the impossible made systematic — whether the canon is already magical or the writer is introducing magic where none existed. Covers everything from intricate original magic systems to a single inexplicable curse driving the plot.
Canon Compliant
Fic that fits inside canon without contradicting it — missing scenes, between-episode interludes, and untold perspectives slotted carefully into the gaps the source left open. The discipline of the form is making the new material feel like it was always there.
Reader Insert
Fic written in second person where 'you' are a character in the story, usually opposite a canon favorite. The reader-insert form, often tagged with (Y/N) conventions, is one of fandom's most popular and most distinct storytelling modes.
First Kiss
The whole story bends toward a single moment: the first kiss, whether it arrives after 200,000 words of slow burn or ambushes everyone in chapter two. Fandom treats the first kiss as a destination worthy of its own tag, craft, and ceremony.
Fake Dating
Characters pretending to be in a relationship, usually developing real feelings along the way.
Amnesia
One character loses their memory, creating angst and opportunities for relationships to be rebuilt from scratch. Past connections are rediscovered or reimagined.
Dark Fic
An umbrella label for stories that deliberately explore disturbing territory — moral corruption, violence, unhealthy relationships, or grim endings — without softening the edges. Dark fic is clearly tagged on AO3 so readers can opt in with full knowledge of what they are getting.
Mistaken Identity
One character is mistaken for someone else, leading to comedic or dramatic situations. Romance may develop based on false assumptions that must eventually be addressed.
Body Swap
Characters magically or scientifically switch bodies, leading to comedy, self-discovery, and deeper understanding of each other. Romance may develop from new perspectives.
Fantasy
Secondary worlds, sword-and-sorcery quests, and fantasy AUs that relocate a modern cast into kingdoms, guilds, and enchanted forests. The tag covers both fic set in canonically fantastical worlds and full genre transplants.
Crossover
Two or more separate canons collide: characters from different universes meet, team up, fight, or fall in love. Crossovers range from elegant fusions that merge settings into one world to gleeful collisions that drop one cast into another's plot.
De-aging
Characters are transformed back into children or teenagers, either physically, mentally, or both. Leads to protective dynamics and unique relationship challenges.
Adventure
Quests, journeys, and expeditions: fic where characters leave home, face dangers, and come back changed — or don't come back at all. Adventure tags everything from epic original quests to road trips through canon settings the source material never explored.
Grief & Mourning
Stories that sit with loss: characters mourning a death canon rushed past, or grieving losses that aren't deaths at all — homes, futures, versions of themselves. Grief fic ranges from raw immediate aftermath to the strange long tail of missing someone for years.
Polyamory
Romantic relationships among three or more people, written with the negotiation, jealousy management, and abundant communication that real polyamory requires — or with the easy harmony fiction allows. Covers triads, vees, and whole-team arrangements.
Slice of Life
No villains, no stakes, no countdown — just characters living: groceries, lazy mornings, inside jokes, the small rituals of days together. Slice-of-life fic finds its drama in the texture of the ordinary.
Omegaverse (A/B/O)
A fanfiction-original setting in which people have a secondary designation — alpha, beta, or omega — with associated biology, instincts, and social hierarchies. Omegaverse worldbuilding varies enormously by author, and stories use the framework for everything from romance to pointed social commentary about bodies and autonomy.
Redemption Arc
A character who has done genuine harm works to become someone better, earning forgiveness slowly or sometimes never receiving it at all. Redemption fics take a villain, an antagonist, or a fallen hero and ask what atonement would actually cost them.
Marauders Era
Harry Potter fic set during the schooldays of James Potter, Sirius Black, Remus Lupin, and Peter Pettigrew — the 1970s Hogwarts generation. A fandom-within-a-fandom with its own canon of fanon, dominated by Wolfstar and Jegulus and forever shadowed by how the first wizarding war ends.
Unrequited Love
One character loves and the other doesn't — or can't, or won't, or never finds out. Some fics resolve the imbalance; the bravest ones don't, and let the loving character carry it, survive it, or finally set it down.
Vampires
Creatures of hunger and immortality, whether canon provides them or the writer turns the cast. Vampire fic spans gothic horror, aching romance across mortal lifespans, and domestic comedies about blood-bag logistics.
Age Gap
A romance between adult characters with a significant difference in age, and often in life experience to match. Fics in this tag range from gentle explorations of mismatched timelines to deliberate examinations of the imbalances such pairings can carry.
Mystery
Something is wrong and someone must work out what: disappearances, ciphers, impossible crimes, and secrets with bodies attached. Mystery fic includes whodunits, slow-unraveling secrets, and stories where the reader solves alongside the characters.
Healing
Stories centered on recovery — physical, emotional, or both — where the plot is less about what broke a character and more about the slow, nonlinear work of putting themselves back together. Often paired with a patient love interest or a supportive found family.
Coming Out
A character tells the people in their life who they are — their identity, their orientation, their relationship — and the story lives in the telling and its aftermath. These fics span the full range from joyful acceptance to painful rejection to quiet, anticlimactic relief.
Kid Fic
Children enter the picture: characters raising their canon kids, adopting strays the plot drops on them, or suddenly co-parenting a de-aged teammate. Kid fic turns heroes and antiheroes into parents and mines the comedy and tenderness of the adjustment.
Opposites Attract
Two characters with clashing temperaments, values, or lifestyles fall for each other precisely because of their differences. One is chaos, the other is order; one runs hot, the other cold; and somehow they fit.
Mates
A supernatural bond designates two characters as destined partners, common in werewolf, vampire, omegaverse, and fae settings. The mate bond may be instantly recognized, slowly discovered, or actively resisted, and stories often examine what fate owes to choice.
Coming of Age
A young character grows up on the page — navigating first responsibilities, first heartbreaks, and the gap between who they were told to be and who they are. These fics often expand the adolescence canon skipped over or compressed.
Obsession
One character's fixation on another consumes the narrative — watching, collecting, orbiting — whether it resolves into requited intensity or curdles into something dangerous. Tagged clearly so readers can choose how dark they want the spiral to go.
Whump
Fic that puts a character through sustained physical or emotional punishment — injury, capture, fever, collapse — with loving attention to their suffering and, usually, to the people who tend them afterward. The pain is the point, and the tag is the warning.
Betrayal
Someone trusted turns the knife — a defection, a lie unraveled, a secret sold — and the story measures the wound. Betrayal fic covers the act itself, the discovery, and the long question of whether the breach can ever be repaired.
Historical
Fic set in a real historical period — regency ballrooms, world wars, golden-age piracy, 1980s small towns — either because canon lives there or because the writer relocated the cast. Distinct from historical-au in usage mainly by covering canon-era period fic too.
5+1 Things
A beloved fandom structure: five times something almost happens, didn't happen, or happened unnoticed — and one time it finally, fully does. The format turns repetition into rhythm, each vignette raising the stakes for the payoff.
Team as Family
A squad, crew, or workplace team that has quietly become each other's family, complete with bickering, traditions, and ferocious protectiveness. The mission matters less than the people running it together.
Trauma Recovery
A serious, sustained look at a character processing trauma canon inflicted and then ignored — nightmares, triggers, therapy, relapse, and the slow reconstruction of a sense of safety. Often written with notable care and research.
Friends with Benefits
Two friends agree to a no-strings physical arrangement and draw up rules to keep feelings out of it — rules that begin failing almost immediately. The genre convention is ironclad: someone always catches feelings, and usually both already had them.
Post-War
Set after the great conflict of canon ends, these stories ask what survivors do with peace they never expected to see. Especially central in Harry Potter fandom, where 'post-war' covers the rebuilding of the wizarding world after the Battle of Hogwarts, but the label applies anywhere canon ends in victory and rubble.
First Love
The terrifying, all-consuming experience of loving someone for the first time — clumsy confessions, overanalyzed text messages, and feelings too big for the person carrying them. Often but not always set in adolescence.
Pack Dynamics
The social structure of a werewolf pack — or any group written with pack logic — drives the story: hierarchy, scent-marking, puppy piles, and the bone-deep need to belong somewhere. Central to werewolf fandoms and omegaverse settings alike.
Sports
Fic where the game matters: training arcs, tournaments, rivalries across the net or the pitch, and the particular intimacy of teammates who sweat and lose and win together. Native to sports anime fandoms and exported everywhere as the sports AU.
Sick Fic
A character comes down with something — flu, fever, a cold they insist is nothing — and someone else takes care of them. The illness is usually minor; the caretaking is the entire point, complete with soup, blanket forts, and walls lowered by a temperature of 102.
Hurt No Comfort
The first half of hurt/comfort with the second half deliberately withheld: characters suffer and the narrative offers no rescue, no soft landing, no fixing. The tag is a promise to readers that the pain will not be cushioned.
Rivals to Lovers
Two competitors locked in an ongoing rivalry — athletic, academic, professional, or magical — gradually realize their obsession with beating each other has curdled into something much softer. Unlike enemies, rivals usually respect each other from the start.
Loyalty
Stories that put allegiance under pressure: characters choosing each other over orders, ideals, or self-preservation. Loyalty fic explores what devotion costs when staying faithful to a person means betraying everything else.
Roommates
Characters sharing an apartment, dorm, or impractically small flat, where proximity does the romantic heavy lifting. Shared kitchens, thin walls, and borrowed hoodies turn cohabitation into a slow ambush of domesticity.
Survival
Stripped of comfort and backup, characters endure: wilderness, apocalypse, shipwreck, siege. Survival fic is about what people become when staying alive is the whole agenda — and who they choose to keep alive with them.
Power Dynamics
The story foregrounds an imbalance — rank, wealth, magic, immortality, captivity — between characters and watches how it shapes everything between them. Some fics dismantle the imbalance; others examine what intimacy looks like inside it.
Case Fic
A story structured around solving a case — a murder, a haunting, a heist gone wrong — with the plot doing as much work as the relationships. Beloved in procedural and detective fandoms, where writers craft original mysteries worthy of the source material.
Secret Identity
A character lives a double life — superhero, spy, undercover royal — and the story orbits the strain of the secret and the looming moment it breaks. Romance versions often have one partner unknowingly involved with both identities.
Toxic Relationship
A clear-eyed portrayal of a relationship that harms the people in it — manipulation, codependence, cycles of rupture and reunion — written as examination rather than endorsement. Tagging conventions on AO3 let readers engage with these dynamics knowingly.
Reincarnation
Characters live, die, and find each other again in another life — sometimes remembering, sometimes only feeling an inexplicable pull toward a stranger. Reincarnation fic spans single rebirths and centuries-long cycles of meeting and losing.
Dragons
Hoards, wings, and fire — dragon fic includes dragon riders, dragon shifters, dragon companions, and characters who simply are dragons with all the territorial instincts that implies. Hoarding behavior applied to loved ones is a beloved sub-genre of its own.
Strangers to Lovers
Two people with no history meet and build a relationship from zero on the page. Common in AUs where canon characters who know each other are reintroduced as strangers, giving writers the rare pleasure of a true first impression.
Political Intrigue
Courts, councils, and conspiracies take center stage as characters maneuver through alliances, betrayals, and power plays. These fics trade battlefields for negotiating tables and treat a well-placed rumor as deadlier than any sword.
Childhood Friends to Lovers
Two people who grew up side by side — sandbox, sleepovers, shared scraped knees — realize somewhere along the way that what they feel stopped being friendship years ago. The history is the romance: every memory becomes evidence in hindsight.
Trust Issues
A character whose past taught them that depending on people is dangerous slowly learns to let someone in. The walls come down brick by brick, with setbacks treated as part of the process rather than failures of it.
Dark Romance
Romance that deliberately keeps its sharp edges: morally compromised lovers, dangerous power imbalances, and affection entangled with threat. Distinct from toxic-relationship fic in that the darkness is the genre's draw rather than its diagnosis, and AO3's tagging system ensures informed reading.
Second Chance Romance
Lovers who already failed once — a breakup, a divorce, a choice made young and regretted long — get another shot years later. The history is both the obstacle and the foundation: they know exactly how to hurt each other, and exactly why it was worth it.
Mentor & Student
A bond between teacher and pupil drives the story, whether it is a master training an apprentice, a jaded veteran reluctantly taking on a protégé, or a found-family dynamic where guidance becomes parenthood in all but name. Usually platonic and often the emotional core of gen fic.
Protective Love
Love expressed through shielding — a character whose first instinct is to stand between the person they care about and anything that threatens them. Distinct from possessiveness, the focus is devotion shown in action rather than control.
Hate to Love
Two characters who genuinely cannot stand each other are forced into proximity until irritation reveals itself as fascination. Sharper and pettier than classic enemies-to-lovers — the conflict is personal dislike rather than opposing sides.
Tragic Romance
A love story written with the ending already weeping on the horizon — death, separation, or doom that no devotion can outrun. The romance is real and luminous, which is exactly what makes the loss land.
Love at First Sight
One look and the world reorders itself. These fics commit fully to instant, inexplicable certainty — then spend the rest of the story testing whether the lightning strike can become a life.
Meet-Cute
Two strangers collide in a charming, embarrassing, or absurd first encounter that all but guarantees a second one. The trope is the romcom opening distilled: wrong coffee orders, shared umbrellas, dogs with better instincts than their owners.
Fae & Fair Folk
The fair folk in all their beauty and menace: bargains with hidden costs, true names guarded like weapons, and courts where politeness is a survival skill. Fae fic draws on folklore rules — no thanking, no eating their food, no promises made lightly.
Rebellion & Resistance
Characters rise against empires, regimes, or institutions — running safehouses, printing forbidden truths, choosing the cost of defiance over the price of silence. Rebellion fic ranges from canon resistance movements expanded to full AUs of revolt.
Time Loop
A character repeats the same day, battle, or death over and over until they figure out how to break the cycle. Loops can be comedic, romantic — infinite chances to perfect a confession — or quietly horrifying as the repetitions grind a character down.
Single Parent
One character is raising a child alone — widowed, divorced, or a guardian by accident — and the story balances parenthood with everything else, often including a love interest who has to win over two hearts instead of one.
Star-Crossed Lovers
Two people fall in love while the universe itself — family feuds, opposing armies, species, or fate — conspires to keep them apart. The obstacles are external and enormous, and the love persists anyway.
Enemies to Friends to Lovers
The long road taken in full: open hostility softens into reluctant truce, truce grows into real friendship, and friendship finally tips into romance. The middle stage is the point — these fics insist the characters actually like each other before they love each other.
Long Distance
Lovers or best friends separated by geography — different cities, countries, planets, or timelines — keeping a relationship alive through letters, calls, and counted-down reunions. The distance is the antagonist.
Prophecy
A foretold destiny hangs over the story — the chosen one, the doomed king, the child who will end the war — and characters struggle inside or against it. Fic loves to interrogate prophecies canon took at face value: who wrote them, who benefits, and what happens to the people they name.
Grumpy x Sunshine
One partner is a scowling thundercloud, the other an incorrigible ray of light, and the sunshine one is usually the only person the grump can't manage to scare off. The grump's gradual softening — visible to everyone but themselves — is the engine of the trope.
Villain AU
The hero goes dark: an alternate universe where a canonically good character chose — or was pushed toward — villainy. The best villain AUs keep the character recognizable, building their fall from traits canon already showed.
Exes to Lovers
A broken-up couple finds their way back to each other, hauling the wreckage of round one with them. Unlike second-chance romances separated by circumstance, exes chose to end it — which means the reunion has to reckon honestly with why.
Neighbors
The romance next door: characters who share a wall, a hallway, or a fence and get tangled in each other's lives through borrowed sugar, loud music complaints, and packages delivered to the wrong unit. Proximity does the plotting.
Road Trip
Characters in a vehicle with too many miles and feelings ahead of them: gas station snacks, radio arguments, motels with one bed, and conversations that only happen staring at a highway instead of each other. The journey reshapes whoever finishes it.
Mutual Respect
A relationship — romantic or platonic — built on two characters genuinely admiring each other's competence, judgment, and character. Often the quiet backbone of partner fics, where trust is demonstrated through action rather than declared.
Magic Reveal
A character's hidden magic is finally exposed — by accident, by sacrifice, or by choice — and the story reckons with everyone who was lied to. The defining trope of BBC Merlin fandom, where Merlin's secret from Arthur powered a decade of fic, though it appears wherever magic must be hidden.
Battle Couple
Two people in love who fight side by side, reading each other's movements like a shared language. The combat is the relationship made visible: trust at full speed, with weapons.
Hanahaki Disease
A fictional illness born in fandom: unrequited love causes flowers to grow in the sufferer's lungs, coughed up petal by petal, fatal unless the love is returned or surgically removed — along with the feelings themselves. The choice between dying of love and surviving without it is the trope's cruel engine.
Fake Marriage
Fake dating's higher-stakes sibling: characters marry for visas, inheritances, insurance, or undercover assignments, and must perform an entire domestic life convincingly. Rings, shared addresses, and in-laws make this lie far harder to compartmentalize than a few staged dates.
Murder Husbands
A couple united by violence — partners in crime in the most literal sense — whose devotion to each other is matched only by their shared body count. Coined by the Hannibal fandom and now applied to any pairing whose romance is inseparable from their crimes.
Heist
Assemble the crew, case the target, watch the plan fall apart at the worst moment — heist fic imports the caper genre's clockwork pleasures into any fandom. The con can be canon-typical or a full AU where everyone gets a criminal specialty.
Terminal Illness
A character is dying on a known clock, and the story is about what they — and the people who love them — do with the time. Some fics walk all the way to the end; others find a reprieve; all of them are clearly tagged for readers choosing how much heartbreak to sign up for.
Quirkless AU
A My Hero Academia alternate universe where Izuku Midoriya never receives One For All — or where quirks don't exist at all. Quirkless Deku fics explore heroism without power: vigilante arcs, support-gear genius routes, and stories about worth in a society that measures it in abilities.
Bodyguard Romance
One character is paid — or sworn — to protect the other, and the professional distance that job requires erodes with every shared hotel room and intercepted threat. The forbidden element is built in: falling for your principal is the one thing a bodyguard must never do.
Friends to Enemies to Lovers
The cruelest arc in the catalog: a deep friendship shatters — betrayal, war, ideology — and the former friends meet again as enemies before finding their way to something neither name fits. The old intimacy makes the enmity vicious and the reunion unbearable.
Force Bond
A Star Wars trope: two Force-sensitive characters share an involuntary telepathic connection that transmits thoughts, emotions, and sometimes physical presence across any distance. Canonized by Rey and Kylo Ren in the sequel trilogy, and fanon-applied to pairs across every era.
Pro Hero AU
My Hero Academia fic that skips ahead to the cast as adult professional heroes: agencies, rankings, press conferences, and patrol-shift romances. The time-skip lets writers age up the students and explore the industry canon only sketches.
Eighth Year
A Harry Potter fandom invention: the war's survivors return to Hogwarts for a make-up eighth year, sharing dorms across house lines while the castle and its students rebuild. The premise was practically engineered for Drarry, forcing former enemies into adjacent beds and joint detentions.
Sunshine x Grumpy
The same beloved dynamic more commonly tagged as grumpy-sunshine, named from the bright half's perspective — often used when the cheerful character is the story's point-of-view or the one doing the pursuing.
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