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"If an NPC is known as 'the One', I cannot volunteer to be 'the Two'."

In stories where the characters are organized with a kind of official order, hierarchy or theme, it becomes easy to simply expand that group to add new characters of the same type. This means the writer doesn't have to retcon half the Backstory in order to add additional characters to the cast. Likewise, well-done fanfics can use the story's Theme Table to insert original characters, bending canon instead of breaking it.

If this is done to simply add a new character out of the blue, it can give the illusion of added legitimacy to the new character's place within the hierarchy/theme of the cast. If the main characters are the last of their kind, then these characters will be There Is Another.

Unfortunately, many a Self-Insert Fic using this trope is common enough that some fandoms have a knee-jerk hatred of them. Especially when the trope is used to rehash ideas for a role that has already been filled in canon or previous fanfics. However, this concept is not inherently bad and it can still be used legitimately.

So why do Sailor Earths pop up in a given work? Human beings are naturally completionists when it comes to patterns, so if a work feels like an element is missing from it, be it a certain role, personality, skill-set or an actual power, then fans will come in and fill the missing "element". Oftentimes the creators would end up filling that role anyway, either leading fans to exclaim I Knew It!, or disappointing them now that their predictions have been invalidated.

Named for a particularly prevalent phenomenon in Sailor Moon fiction.

See also: Send in the Clones, Elsewhere Fic, and Fan-Created Offspring. Compare Obvious Crossover Method. A would-be member of The Chosen Many. Contrast The Unchosen One, who is a canon character who isn't a member of an order. Not to be confused with the webcomic Sailor Sun, or with the trope Sailor Senshi Sendup (which is about expies of the Sailor Moon cast).

Note: Please do not add personal examples of the trope in the list below. The list is for discussing general trends of the trope or official examples.

Example subpages:

Other examples:

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  • The Monster Cereals lend themselves to having original characters created often by fans. All that is needed is a monster archetype and a cereal flavor, along with a name that combines the two in some way, and a character is formed.

    Comic Books 
  • Asterix is no stranger to introducing male Gauls into the series. Just create a character whose name is based on a word or phrase ending with "ic", "icks", or "isk". As for male Vikings, any name based on a word or phrase ending with "af" or "aph". And for male Romans, any name based on a word or phrase ending with "us" will do just fine.
  • This happened to an explosive degree in Green Lantern's Sinestro Corps War, with legions of ring wielders for every color either coming into existence or being hinted at.
    • There was actually a Vulcan Green Lantern once, who appeared in a page of an issue of the series in the 1970s. While unnamed, the character even makes the Vulcan Salute! He was just a sight gag/Shout-Out at first, until a subsequent 2000s Continuity Porn-filled run brought him back, named him Saarek, and gave him a gimmick: he's apparently a medium/necromancer.
    • There's the Pierson's Puppeteer GL seen in the Larry Niven-authored graphic novel Ganthet's Tale; though most likely simply a Shout-Out to the author on the part of artist John Byrne, the thought of a fearless Puppeteer (because this was before the retcon to the GLC's primary qualification) makes the mind boggle. And Byrne drew it with a neat mane, too, so either it was so insane that it came out the other side into sanity, or a Power Ring can be used as a hair care tool.
    • There's fanart of just about anybody and their brother (anime/manga/game/TV/movie/book characters included, plus non-DC comics) with the color of ring most suited to their personalities.
    • Also, in spite of the fact that this theory has been allegedly Jossed by Geoff Johns, the idea of the colors uniting to form the white light of creation to combat the Black Lanterns has led to the creation of White Lanterns in many fandoms. The lead-up to Brightest Day only fueled it further.
    • Common fandom jokes: Grey Lanterns, aka the Apathy Corps (previously called White Lanterns before those were made canon and completely different). Also Infrared and Ultraviolet Lanterns. The Invisible Spectrum and the Ultraviolet Corps eventually got canonised in Scott Snyder's Justice League run.
    • Human Green Lanterns also get this treatment, in both canon and fanon. Originally there was only one Green Lantern of Earth, Hal Jordan (Alan Scott was there too, but he has nothing to do with the Corps), and it was explicit canon that all races only have one Green Lantern. Then they introduced Guy Gardner, then John Stewart, Kyle Rayner... as it is now, there have been nine Green Lanterns from Earth, many of them operating at the same time, while pretty much every other species still only has one representative like canon states they should. Given this, it’s not surprising that fanfics are littered with even more human Lanterns.
    • Grant Morrison revealed in New X-Men that, in the Weapon X program Wolverine belongs to, X is actually the roman numeral 10. He then introduced Weapons I through XV.
  • The Smurfs has an easy template for new Smurf characters — one just needs both a name (mainly "Adjective Smurf") and modifications to his appearance to reflect his personality. Smurfs: The Lost Village introduced non-artificial female Smurfs, complete with their own "Smurf Noun" naming scheme.
  • The first special of The Wicked + The Divine focused on the 1831 Pantheon, but deliberately only named eleven members (the Brontë sisters counting as a single triplicate deity). Word of God from Kieron Gillen has said that this is so readers can take their own favourite Romantic artist and their favourite deity in their headcanons for the pantheon. This may be an example of Kieron Gillen in typical creator-troll mode, as later issues reveal that each Pantheon includes a Minerva, as the new form of Ananke, and a Persephone.
  • This is extremely easy in X-Men fan fics. Everything from new members, new students at the school, even entire teams can be dreamed up easily, since the only criterion is that one was born with one's powers (and even that isn't set in stone). The series was actually created with this principle in mind, as it saved Stan Lee the trouble of coming up with unique origin stories.
  • Symbiotes are a really easy and popular source of OCs. In-canon, there are already many of them, practically all of them with their own handful of unique powers or skills, looks, and relationships with their host, so fans have a fun wide sandbox to play in without stretching canon too much.

    Films — Animation 
  • 9:
    • Fans tend to create their own stitchpunks with numbers of 10 and higher. Which may or may not totally defeat their original purpose, or maybe the fans just imagine themselves to be the scientist's partners who all decided to band together and create an army of stitchpunks for a more likely chance of destroying the machine.
    • Another common practice is creating a stitchpunk named 0, who is almost always a prototype created by the scientist or an elder stitchpunk created alongside 1 and 2.
  • Disney Princess:
    • This is really common with the Disney Princesses. All you need to do to make an OC Princess is to give her a fairy tale-esque story and designate her to a specific culture. Many OCs have been made on the premise of adding an Indian princess, a Spanish princess, a Pakistani princess, etc.
    • There's also the fact that the princess line is based on real-life folklore and fairy tales (albeit, more loosely in some cases than others), so there's the added fun of taking a fairy tale not yet done and adding some Disneyfication to them. One notable (and very well-done) example would be the fanfiction Hope Springs Eternal, which basically converts the Persephone/Hades love myth to the movie-verse and naturally includes a Disney version of Persephone, of the author's creation.
  • Inside Out is set in the mind of a young girl, and involves her five personified emotions — Joy, Anger, Disgust, Fear, and Sadness (based off the theory of the Six Basic Emotions — the sixth was Surprise, but writers thought a Surprise character would be too similar to Fear), so it's pretty easy to add other emotions like Love, Hope, or whathaveyou (and indeed, earlier in development Riley had other emotional personifications that ended up being cut — Pride, Hope, and Gloom, to name a few). Also, since other characters' sets of emotions are shown, you could just make up another character and show what's going on inside their heads.
  • The very concept of Spider-Man: Into the Spider-Verse has made it ridiculously easy to make OCs; just create a Spider-person from another, another dimension, give them a unique gimmick, and you're good to go.
  • Wreck-It Ralph:
    • Plenty of fans have come up with their own Sugar Rush racers. All you need to do is make a boy or girl that wears a dessert, confectionery creation or any sort of sweet food themed clothing, and then give him or her a ridiculous name. A bit like Strawberry Shortcake but with a Cool Car.
    • Don't like racing? Just have the arcade get a new machine added with your favorite game! You can import any naming theme you want that way.

    Films — Live-Action 
  • Brightburn only has 3 Corrupted Character Copy characters, but all you gotta do is take a superhero and turn them evil to create an OC.
  • Making a Descendants character can be ridiculously easy; just pick a Disney Animated Canon character (hero or villain), give them a kid, and give the kid a name similar to that of the character you picked. If you don't want to use a Disney film as your basis, just pick any one of their numerous animated shows. If you're feeling really ambitious, you could use characters from Disney properties like Star Wars or the MCU!
  • There are quite a few Ghostbusters franchises within the United States and worldwide, many of whom do charity events, fundraisers, and the like.
  • There are numerous Godzilla fan works that introduce at least one all-new kaiju. The MonsterVerse continuity has it especially easy: All the canon and continuity-original kaiju have Mythical Motifs based off (and being the in-story origin of) some kind of mythological creature, monster, or god with an animal motif (Behemoth, Scylla, Bunyip, Quetzalcoatl, etc). Making an OC is as easy as picking a mythological critter (scientific explanations for its abilities optional) and there you have it. As of this writing, creatures from Norse Mythology are especially popular, in particular the Fenris Wolf.
  • The setting of The Matrix lends itself extremely well to original characters: just have someone new get unplugged from the Matrix. In fact, you can make a whole ship full of OCs if you want (preferably with a classical name, in the tradition of the Nebuchadnezzar and the Osiris). In most cases, the fact that the vast majority of red pills are unplugged well before adulthood will be addressed in one of two ways: if the fanfic writer is an adult him/herself it'll be overlooked, and if they're a teenager or younger it'll be used to justify making the character their own age.
  • Newsies is a gold mine for this kind of thing; the only thing all Newsies have in common are evocative, character-defining nicknames, and a hard-luck past. There's also the historical existence of less common girl Newsies (although none appear in the film), but good luck finding a Girl Newsie story where she isn't the only girl living among all the boys.
  • Pacific Rim has, at the time it takes place, every single Jaeger accounted for. However, in the fictional history of The 'Verse up to that point there have canonically been many Jaegers, not all of which are named or described, but all of which can be identified by a few key points. They each have a nation of origin (which is not necessarily the same nation of the pilots or its area of operation), and a generation designation from mark one to mark five. Creating one involves picking a nation, a mark, and giving it a word-salad name, and it can probably slip into existing canon easily enough. Same goes for Kaiju for them to fight, who range in size from category one to category five and often have a Japanese name. In fact, the website even had a minigame specifically designed for this: you could mix and match parts from all the existing Jaegers, input a name and nation of origin, and you could make your own fanmade poster for the film.
  • Real Steel introduces a world where boxing is now done between robots. Each robot has a different theme, and many of them are implied to be homemade. All a fanfic writer would need to do is create a robot, and give it a Back Story. The film and additional material related to it give many facts for Worldbuilding as well; for example, robot boxing originated in Japan.
  • Every other Sky High (2005) fic seems to involve a new, oh-so-speshul student at the school with an improbable name and various Combo Platter Powers who quickly becomes the center of everything and makes out with Will, Warren, Zach or even Lash if female and Layla or Gwen if male (we're not sure if we should pity or envy Magenta and Ethan that they're typically spared all this nonsense). The prevalence of such characters is without a doubt due to the sheer ease with which they can be created; there are almost certainly students and even teachers we didn't see in the film, plus the various unnamed characters we did see, all with unknown powers, and as noted above under 'General' the school setting makes "transfer student" a logical way to introduce a new character, as well.
  • Though not as common as they once were, a lot of Stand by Me fics tend to retell the plot of the movie with a girl accompanying the boys on their trip to find Ray Brower. Three things you expect from these fics: A) the girl will be the narrator instead of Gordie. B) The girl will always be a "Tomboy" or at the very least be the "Least girly girl ever". And C) be head over heels in love with Chris Chambers, either confessing her feelings for him during the journey or, if the author continues on from the journey, confess during their teenage years.
  • Star Wars: Generally, fan-made characters tend to be Jedi in hiding, bounty hunters, smugglers, or Imperial troops/officers. The 501st Legion is an entire group of Stormtrooper cosplayers who have since become Promoted Fanboys, and many of them come up with their own names, ranks, and backstories.

  • The original Lost Worlds gamebooks (and its Japanese twin series Queen's Blade) has this in spades, since the original LW books (and the first QB ones) didn't have a detailed plot beyond (at least in the QB case) the aforementioned tournament, so you can create any girl from any classic fantasy species (humans, elves, dwarves, etc.) as long that character is a female and sometimes that rule is not always set in stone (since it's implied that the ruling queen or the gods can change the rules if they want it).
  • And now with the Queen's Gate gamebooks, you can include any girl from any kind of universe, regardless how far advanced her technology or her culture is in relation to the rest of the cast.

  • For original rap groups in Hypnosis Mic fics, all one needs to do is pick a Tokyo ward or popular Japanese city not covered by the series, give it three oddballs themed around the place, and throw them into the ring.
  • Neither Earth nor Pluto appear in Gustav Holst's Planets Suite; Pluto hadn't been discovered yet note , and Earth was, from Holst's astrological perspective, insignificant. Some amateur composers have created music to fill in these two gaps.
  • SiIvaGunner's King for Another Day event (a tournament where viewers vote for their favorite contestants, and the winner gets an entire day's worth of video game remixes themed around them) has inspired fans to come up with their own contestants. All you have to do is pick any fictional character and come up with a list of the types of music they'd be associated with (which includes music from the character's source material, but also music from media from the same genre or creator, or which is thematically appropriate for the character. Oh, and some contestants are teams, so another source of inspiration is to group up multiple characters with a common theme and come up with a clever name for the team.

    Mythology and Folklore 
  • Arthurian Legend: King Arthur's Knights of the Round Table basically consist of a handful of characters who were in the original Welsh stories, plus a significant accretion of these type of characters, many of whom have been around for long enough that it's hard to imagine the stories without them. The most notable of these is Lancelot, who Chrétien de Troyes basically invented (links to an earlier Welsh figure are at best extremely tenuous).
  • It's very easy to just create new Merry Men to follow Robin Hood, and writers have been doing so for literal centuries (the most recent - as in beginning in the 1990s - has been adding a Token Minority).

    Pro Wrestling 
  • The most common plot trope in wrestling fics in the last few years is the introduction of a new WWE Diva (or in some very rare occasions, a new male wrestler). Understandable as there are always wrestlers coming and going. Either the girl is a legitimate fighter trying to be the second coming of Chyna and bring credibility back to the Divas division, or she's there to be the romance object of a male wrestler (the members of the Shield have been very popular targets lately). Often, these new wrestlers are the children or younger sisters of an current star.
    • Sometimes, they vary the formula by having the new girl be a makeup artist, wardrobe girl, or a member of the tech crew.
  • Kane was technically a Sailor Earth, as for awhile the WWE was desperately trying to find someone outside of Hulk Hogan, Randy Savage, or the Ultimate Warrior for The Undertaker to feud with for years after turning him face. Very few worked. Mankind became a counterpart character seemingly by pure serendipity. Kane was based on the early name for the Undertaker himself, given a backstory, and the two would go at it for years afterwards.
  • One could argue that any long running character in any promotion who suddenly gains a rival who is somehow tied to that character's past is technically a Sailor Earth, regardless of whether that character is an ally or adversary. This has most recently been seen being utilized in Lucha Underground, who introduced Dante Fox, who would become an on again/off again rival for Killshot.

  • It's pretty easy to make a Nomad in A Game of Gods - just pick a Greek Letter and a color, and voila, one Nomad.
  • In addition to characters drawn directly from canon and fully-original characters from player-created themes, Mahou MUSH provides the option to create original characters for canon themes. The Magical Girl Lyrical Nanoha and HappinessCharge Pretty Cure! casts especially boast a large number of original members due to how easy it is to explain new characters obtaining a Device or a PreCard. (The Trope Naming franchise has much fewer original cast members, although it does have a few — none of them Sailors.)
  • Suburban Senshi, given that the above-mentioned Sailor Moon and Doctor Who are part of the setting, has this in spades. Just for an example, there are Satellite Senshi based on each of Sol's planets that have moons.

  • BIONICLE has plenty of humanoid species where only one or two named characters exist, and in order to expand on the main Toa cast all you need to do is choose any of the Elemental Powers, add a Mask of Power and a weapon with optional attribute (especially since Word of God has it that there are dozens, if not hundreds, of Toa who don't feature in the main story). Or, you could try your hand with the numerous Dark Hunters, which are already a mixed bag of various species, powers and motives. The same applies for everybody in the Bionicle canon.
  • For Hero Factory, the successor line to Bionicle, LEGO created the Hero Recon Team. In-universe, the Recon Team is an intelligence force keeping tabs on the locations of villains. Out-of-universe, it's a program that lets fans create their own in-canon original characters and buy toy versions of them.
    • Sadly, you can no longer purchase the figures. It is now simply a watered down creation tool, like the designer software.
  • Ever After High:
    • Most common examples are original characters for famous fairy tales that don't have canon EAH characters (especially ones with Disney versions). Alice in Wonderland original characters also pop up frequently due to several canon characters, as are ones for The Wonderful Wizard of Oz. There are also OCs for more obscure fairy tales by Brothers Grimm, Hans Christian Andersen, and Charles Perrault, and even a few original characters for stories by more obscure fairy tale writers such as Madame d'Aulnoy and Andrew Lang.
    • Disney-based OCs run rampant, and they are despised by much of the fandom, especially when the character designs closely resemble the Disney character. The worst offender has been Frozen — daughters of Elsa have popped up frequently. Other offenders include characters based on Pocahontas, Tangled, and Brave.
    • Among the plethora of fan characters are plenty based on darker fairy tales, generally created by members of the Periphery Demographic.
    • As the series has a broad definition of the term "fairy tale" note , it's very easy to push the boundaries with OCs while still staying true to the theme. You don't see too many fans introducing, say, the son or daughter of Coyote, but it seems that just about anything is fair game in a franchise that gives you the likes of Paul Bunyan's daughter or the daughter of a Joker Card. (Yes, as in the actual playing card.)
    • Some people take this to ridiculous extremes by suggesting that every story in the universe is a part of Ever After High's endless cycle and creating characters to match. For example, this AU fic has the Evil Queen marry (and have Raven with) her generation's Steve "Leopard" Leonard, and a character tries to cover up an unexpected Teen Pregnancy by lying that she's this generation's Jane the Virgin (with other characters dismissing the idea she could be Juno).
  • Monster High is littered with fan characters. All one has to do is think of a famous monster, then come up with their offspring's profile. The trouble is, fans have a hard time telling appropriate uncanonical monsters (like, say, selkies or harpies) from more figurative monsters (like Jigsaw or Hannibal freaking Lecter)...
  • The original LEGO Dino Attack line was simply about four guys fighting mutant dinosaurs. Dino Attack RPG added a full 237 additional agents, and that's just for the Dino Attack team itself. Other areas that lent themselves well to original characters included LEGO Alpha Team, LEGO Agents, LEGO Pirates, and more, with each theme also getting its own slew of OCs in its respective Play By Post Game.
  • There's more than one fanmade Earth character for Milky Way and the Galaxy Girls, as that's the only planet in the Solar System that hasn't been anthropomorphized.
  • My Little Pony has tons of characters already, so a few more wouldn't make a big splash. Most G1-G3 fanworks revolve around OC ponies. Many were Winged Unicorns, which wouldn't appear until G4 (Friendship is Magic).

    Visual Novels 
  • This isn't too hard for the Ace Attorney series. You just need to think of a Punny Name for your new lawyer/police detective/murder victim/suspect/etc and give them a few personality quirks. Also, Dual Destinies asserts the trend name for lawyers of the Wright Anything Agency: Myth-inspired first name, legal term-inspired surname, a suit color, and if you're going the extra mile, a weird hair shape. For everyone else, a visual motif doesn't hurt. Fan-works also love creating new past unsolved cases, following the canon naming scheme of "Letter Letter-Number Incident." This fits very well seeing as canon keeps adding more of these with each game.
  • In Danganronpa it's incredibly easy to make a new Ultimate Student: all you have to do is give them a talent that hasn’t appeared in the series yet (though duplicates sometimes exist in canon), a weird hairstyle, and a couple of personality quirks. There's already a template in the franchise for information on each student, making fan-made characters even easier to describe. Since the only recurring element from each entry in the franchise is the presence of Monokuma and Junko Enoshima, entire killing games can be made from a cast of OCs.
    • Since the Ultimate students attend Hope's Peak Academy and only a handful of classes have been shown in canon, fanfic authors can create classes full of original characters forced to murder each other by Monokuma.
    • Ultimate talents don't even have to be all-encompassing: Kaede Akamatsu is the Ultimate Pianist even though Ibuki Miuda is the Ultimate Musician, since Ibuki focuses mainly on rock music. So for example, if you want your original character to be the Ultimate Dancer even though Hiyoko Saioniji is already the Ultimate Traditional Dancer, it's allowed if you make your OC's talent be based around modern dancing instead.
    • Some Fanganronpas have a new mascot instead of Monokuma, such as a bird or monkey version. Canon supports this, as long as the mascot has their name start with "Mono."
    • If you want to make your OC a child instead of a teenager, they exist in canon too! The naming scheme is "Lil' Ultimate" and then whatever class they're talented in.
    • On the other side of the scale, "Ex-Ultimate" students are also common for creating college-aged or adult alumni of the academy.
  • In Fate/stay night by Type Moon:
    • The First and Second Grail Wars have been COMPLETELY blank for Masters and Servants, as well as only 2 Servants named and 2 more mentioned for the Third Grail War with 0 Masters. Some fan stories have filled in their events, commonly stuffing the first one with purely Japanese spirits. Some even add in new classes based on a few throwaway lines.
    • There have been Grail Wars outside of the Fuyuki one, meaning one can set a story in an all-new Grail War. Creating a Servant is quite simple: find a legendary figure and make Noble Phantasms based off the most notable artifacts and events in said legend's life. For example, Fate/Apocrypha does this with two sets of 7 masters with 7 servants and a member of a new servant class called Ruler whose function is that of a referee and judge. Apocrypha furthermore has Variant Holy Grail Wars taking place all over the world, which any mage can participate in any time with references to a "golden age of Hassans" when Masters directly targeted each other, conflicts in Greece stalling out due to the scramble to get the best heroes first, and even an In-Universe wiki to consult!
    • Hell, they don't even need to be legendary figures. Some people have used Simo Häyhä as an Archer or Assassin, or Audie Murphy as a Berserker. While these two are very notable people, they're not "legendary" in the manner of King Arthur or Cú Chulainn, and thus, debates over whether they should be Servants tend to flare up, especially if they bring up the Word of God regarding whether Servants can be based off people from the 20th century on (the issue as far as Nasu is concerned being that contemporary figures are extensively documented, where he likes making liberal interpretations of comparatively brief information).note 
    • Got a particularly weird Servant idea? Not a problem. Even across the official Fate series, the Servant roster has included legendary figures who had much stranger lives than history recorded, or proved to be much stranger beings than believed, legendary figures who've undergone surprising post-mortem transformations, versions of legendary figures from alternate timelines, anthropomorphic personifications, fictional characters who turn out to have been real, and characters who even in this 'verse are supposed to be fictional.
    • And as Fate/Grand Order demonstrates, you don't even need to have a Grail War, or stick to its limits on Servants, as it features a single Master calling on hundreds of Servants to assist them in saving humanity, including many of the various Extra classes from across the Fate series — Avenger from Fate/hollow ataraxia, Ruler from Fate/Apocrypha, Moon Cancer and Alter Ego from the Fate/EXTRA series, and Foreigner, Pretender, and Beast, FGO-original classes. (Of the other prominent Extra classes, the Voyager class from Fate/Requiem was folded into Foreigner, the Faker class from Lord El-Melloi II Case Files was folded into Pretender, the Saver class from Fate/EXTRA has been left alone so far, and it's anyone's guess what they might do with the Watcher class from Fate/strange fake, especially since it has no combat capabilities.)
    • Thanks to Fate/Apocrypha's introduction of Pseudo-Servants (and further expansion from Grand Order and Lord El-Melloi II Case Files, such as naming the idea and adding the related Demi-Servants), even established canon characters in the Fateverse have no excuse not to become Servants one way or another. As long as a connection between the legendary figure and their host character can be made, the sky's the limit.
    • A more specific variation of this trope goes to Alter servants. Simply pick one canonical servant, then think of a way for them to become more of a Darker and Edgier evil servant. From there, you got yourself an Alter servant people can easily use.
  • A Hatoful Boyfriend OC is easy to create, as the series takes place at a school. Adding a new character who attends St Pigeonation's is as easy as getting a stock photo of a bird and designing a human form for them (along with whatever ridiculous and/or tragic backstory the author feels they require). Members of the Hawk or Dove Parties aren't quite as common but still feasible.
  • Tsukihime has a sort of most-wanted list of bad guys, the 27 Ancestors of the Dead Apostles. Several of these are still unrevealed, making it easy to introduce a new villain as one of them. In addition, the list of Ancestors differs between the original Tsukihime and the remake.

    Web Animation 
  • Battle for Dream Island gave way to Object Show OCs, known more generally as "Objectsonas", which are rather simple to create: choose an object, name them after their species and... that's it. Optionally add an "-y" to the end of the object's name.
  • ENA: As it is canon that multiple ENAs exist, many fans have created Original Character ENAs with different designs, colors, and personalities. This is helped by Joel G’s website, which allows people to create their own ENA avatar.
  • When designing Epithet Erased OCs, the first step is to pick a word to be your character's epithet. Almost any word will do (the only exceptions are obscure slang and most proper nouns). In fact, many people start off by picking a word at random, then build the character around that epithet.
  • Hazbin Hotel OCs are ridiculously common. Just create a humanoid character, give them a reason to be in Hell and have them land at the hotel for whatever reason.
  • Red vs. Blue: There's fifty Freelancers (one for every American state — and less than half were revealed note ) and potentially a whole Greek alphabet's worth of A.I.s, so new Freelancers and A.I.s are extremely common.
  • RWBY: Monty Oum came up with rules on how to name original characters:
    • The Extranormal Institute setting and color-coded characters open a lot of room for Sailor Earths. Just pick a color, give the character an outrageous (and often impractical) looking outfit (with the impractical for female characters usually involving a skirt/dress and/or high heels), an equally outrageous and complex weapon (usually combining a melee and ranged weapon, very often a Morph Weapon), a Semblance (a special power unique to the character) and you're done. For the furries out there, you can also make your character a Faunus by adding an animal part to themnote , which may or may not come with additional powers such as Super Senses, Wolverine Claws, flight, or venom. Fairytale Motifs, Mythical Motifs, and references to nursery rhymes and folk stories are also common in RWBY, so you can look to such stories for inspiration.
    • The Fun with Acronyms team naming the Extranormal Institute practices is used to create entire four-person teams of characters as well and they don't even have to spell out the team name in question (e.g. the title itself.)

    Web Comics 
  • A webcomic known as Bishoujo Senshi Sailor Earth exists, using an already existing character (Naru) as Sailor Earth. However, she was not a part of the original Sailor Senshi team/group of friends and is added based on an answer the creator gave to fans about using Naru as Sailor Earth should she ever be needed.
  • Because Drowtales has an on-site RP section this is very common, though there are very specific rules about how created characters can be related to canon characters, and a few characters have actually shown up in the main story as cameos.
  • Homestuck:
    • The webcomic revolves around sessions of a special computer game called Sburb. It's not uncommon for fans to invent their own characters who order and receive the beta in the mail, particularly on the Forum Adventures section of the forums.
    • It's implied that the four canonical kids are the only ones left, given that there seem not to be more "exiles" and the kids' meteors are by far the biggest ones (presumably marking them for the only session that actually gets in). It's implied that nobody else who actually received the game actually got into the medium because they couldn't figure out how to get into the Medium, which is portrayed in canon as a fairly simple process. This of course is totally ignored by fan-adventure writers.
    • It's only Dave and Jade's meteors that dwarf all the others; Rose's twin meteors are pretty average-sized, and John's isn't given the same examination but is probably even smaller. The kids' Sburb session breaks a lot of the rules anyways, so having unusually gigantic meteors for half its players could be part of that anomaly. Also, given that they have the entire planet Earth to be exiles in, it's not that implausible that the groups of exiles corresponding to the main and the Sailor Earth sessions just haven't crossed paths. (Given how much predestination figures in the plot, it could be quite reasonably Hand Waved as the exiles for each session being drawn to each other and only each other.)
    • There's no excuse, however, for the multitude of fan troll sessions — the twelve canon trolls are explicitly the only ones who will ever play Sburb (or rather Sgrub) because their version was coded by a few of their own players, not released by a company like on Earth. The most canon-friendly fan sessions are the ones that invent entirely new species for the players to be, which are in themselves an example of this trope given how similar they tend to be to the trolls — most fan-created species have their own romance system, calendar, family structure, and equivalent of bedding because the trolls were different in these fields.
    • fedoraFreak. Text messages on Dad's phone reveal that one of his acquaintances (actually their neighbor) actually entered and survived in another instance of the Medium and presumably reached God Tier, since the last correspondence with him has him dying on a Quest Bed. That certainly provides a whole load of precedent.
    • Such a plot was actually used as an Alternate Reality Game-like explanation for upgrading the fandom's forums fora software.
    • A popular subset is making a Crossover - characters from another work play Sburb while chatting between each other. Sometimes, the author deliberately doesn't reveal what is the crossed-over verse, challenging the reader to guess what it is from the characters' chumhandles and conversations.
    • Related to this trope, the author has joked that every fan troll is canon. Even the bad ones.
    • Though it overlaps with Epileptic Trees, the hypothetical (well, formerly hypothetical) thirteenth Troll falls into this. Note that the actual thirteenth troll turned out to be an in-universe Ascended Fangirl, and is practically an avatar for Homestuck fandom. In other words...a fan troll. And then she turned out not be a troll, but a new species ... which has its own romance system, family structure and equivalent of bedding. No word on the calendar yet.
    • One of the "God-Tier" rewards for the Homestuck adventure game kickstarter was pledging ten thousand dollars to the game, in order for the person's fantroll to make a cameo appearance (note that the person would have to pay a hundred thousand for their fantroll to survive beyond the first panel) in-story, which only two people paid for. This, along with the way time and space works in Homestuck essentially have given a proper justification for fantroll or OC kids sessions (they could be thought of as existing within their own universes and timelines, such as the one described in the flashback with the aforementioned cameos).
  • Prematurely shot dead by Periodus, after the creator claimed that now someone could make a fic about Oxygen, and a commenter threw out a several-sentence parody.
  • Sailor Ranko, another webcomic based on Sailor Moon fanfiction, in this case a well-known Fuku Fic series that uses the Sailor Earth trope to shoehorn Ranma ½ characters into Sailor Moon.
  • As one might guess from the title, the Sailor Sun webcomic makes full use of this trope even though it should not be confused with the trope itself.
  • The sadly-unfinished Zelda Comic introduced a new, Greater-Scope Villain who was a fallen Sage named Kasuto, in honor of the only town in Zelda II: The Adventure of Link that didn't have a name already attached to a Sage.

    Web Original 

Alternative Title(s): Tenth Walker