Fanon / My Hero Academia

Fanon for My Hero Academia.

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General Setting

• It's often believed that pro heroes are prone to have psychological issues, most commonly nightmares or insomnia. Some even go as far as to develop PTSD.
• Although so far the manga has been pretty lacking in defining how a hero acts during a police investigation, whether it's participating in the investigation or just in the arrests, most fans believe the former to be true, and many fanfics run with this premise, having heroes take an active part in investigations alongside detectives like Naomasa. This perception is supported in canon by the fact that Endeavor demonstrates the analytical skills of a detective during the Field Training Arc, and would explain why his number of resolved incidents surpassed even All Might's. Vigilantes would later confirm this as canon.
• It is commonly believed that the robots during U.A.'s entrance exam had a hidden button that deactivated them, explaining how certain characters like Hagakure and Koda passed the exam. However, this is never indicated in the manga. The closest to this is that by Word of God, Mineta managed to pass by using his Pop Off Quirk to restrain the robots rather than destroy them, meaning the robots didn't have to be destroyed to be beaten.
• Many fans assume that hundreds of years have gone by since Quirks first appeared, based largely on Midoriya's remark that if it weren't for societal progress grinding to a halt with the rise of Quirks, "humanity would be enjoying interstellar travel right now." While there are definitely futuristic elements in the setting like robots and holograms, they're in small supply and the setting is largely 20 Minutes into the Future, with no exact timeframe from the emergence of Quirks to the present day ever given. The closest given is Inko's admission that she is in the fourth generation of Quirk users. Later revelations seem to implicitly deny this, as All For One, a First Generation Quirk user, received his longevity Quirk seventy years prior to the Paranormal Liberation War, with said Quirk also being among the oldest Quirks In-Universe.
• While the subject of killing your enemies has never actually been addressed, many fans believe that heroes are expected to practice a Thou Shalt Not Kill policy at all times and that killing is an ultimate taboo that only villains do. This issue is finally addressed during the Paranormal Liberation War Arc where the heroes are focused on stopping the Paranormal Liberation Front, to the point that Hawks kills Twice.
• Many believe that the 20% figure for the proportion of Quirkless people refers to the entire population in the present time, but not to the current birth rate. This is evidenced by Midoriya being the only Quirkless person in his middle school class, not to mention the number of truly Quirkless characters overall being countable on one hand. In addition, All Might's comments about the status being less unusual in his youth suggest a changing demographic over time. Furthermore, some fans believe that Quirkless people are seen as second-class citizens who are treated poorly and have high suicide rates. The manga later confirmed the part about the Quirkless statistic, clarifying that Quirkless people have "all but vanished" in Midoriya's generation, and heavily implying that they'll disappear entirely in the next one.
• While the manga/anime barely explores Aldera Middle School, only appearing on the first chapter/episode, many fanworks portray it as a massive Sucky School, where most faculty members worship the ground Bakugo walks on and cater to his every whim, hoping that the school can later benefit from his future popularity as a pro hero, and either ignore at best or downright encourage at worst all the bullying Izuku suffers.
  • Aldera is occasionally linked with the Meta Liberation Army as a source of recruitment and propaganda. This usually is linked with the fanon idea that the M.L.A discriminates against the Quirkless (see below for that fanon).
  • Aldera is often believed to have doctored the records of their students to ensure that they get into high ranking schools, specifically making Bakugo's record spotless akin to a model student, and Midoriya's filled with Blatant Lies suggesting he picks fights and causes trouble, often to explain why Bakugo was even accepted to UA and why Midoriya is referred to as a "Problem Child". This tends to ignore that UA's entrance exams are independent of prior school records, that Aizawa only calls Midoriya "Problem Child" once and only ever had issue with him due to thinking his Quirk made him a liability, and that the principle of Aldera Middle School congratulated both Bakugo and Midoriya for getting into UA.
• Quirkless discrimination, while present in canon to some degree, is almost nonexistent outside of Aldera (and even then it was limited to just Bakugo and his Gang of Bullies), and the few times Midoriya's past as a Quirkless individual comes up is always in the context of somebody who has yet to master his Quirk. Fanon expands this idea outward in a hundred different directions from being entirely unacceptable targets to being the casual targets by everyone to something in between. Expect topics like "Quirkless rights", "Quirkism" (discrimination based on Quirks that targets the Quirkless as well), and "Quirkless homelands" to feature in fics without anything to source them in canon bar Aldera in a very loose sense of the idea of a source. As a reverse, the manga does focus on discrimination suffered by people with Mutant Quirks and Quirks with "undesirable" side effects (such as Toga's Quirk compelling her to drink blood) yet ninety-nine times out of hundred said discrimination is completely ignored in fanfiction, usually for the sake of Quirkless discrimination.
• A commonly seen fanon is that people with Quirk Factors are genetically stronger than Quirkless people, to justify how almost everyone in the series is Made of Iron and capable of pulling off Charles Atlas Superpower even if their Quirk in no way physically enhances them, while also staying true to the idea Midoriya couldn't be a hero because he was born Quirkless. Such examples including Aizawa being compared In-Universe to a ninja despite "Erasure" simply nullifying other Quirks, the results of the Quirk test that Aizawa put his students in putting Izuku's results last despite several students lacking physical enhancement Quirks or Izuku's post training physical build^note such as Mineta, Hagakure, and Kaminari without defaulting to ideas like Aizawa rigging the test against Izuku, Stain being extremely fast and durable despite "Bloodcurdle" only acting as The Paralyzer, Sir Nighteye casually carrying and throwing multiple 11lbs stamp seals independent of his "Foresight", and Toga being extremely agile and stealthy even when not using "Transform" and having no formal training.
• Similarly it’s common to see theories about quirked bodies being optimized and losing things like vestigal body parts (appendix, wisdom teeth etc) or having stronger immune systems.
• Quirk-suppressing cuffs and Quirk-suppressing technology in general. They're everywhere in fanworks, but there's no evidence that they exist in canon. This is especially obvious with All for One, whose Tartarus cell is a Tailor-Made Prison that keeps him immobilized at all times and has him wired to many devices that will kill him the second he uses one of his many Quirks, measures that wouldn't be necessary if Quirks could be suppressed through technological means.

U.A. Characters

Main Characters

• The fandom believes that there is a "Bakusquad" and a "Dekusquad". The former is a group that usually hangs with Bakugo composed of Kirishima, Sero, Kaminari, and Ashido (with the possible addition of Jiro and Shinso), while the latter is the group that hangs out with Midoriya, composed of Ida, Uraraka, Todoroki and Tsuyu (with the possible addition of Yaoyorozu, Tokoyami, Shinso, and Aoyama). While it's not far-fetched to believe these characters to be friends, they are never actually seen hanging out in these groups.
• The fandom has a tendency to give the main character an Animal Motif that is not really there in canon:
  • Midoriya is commonly depicted as having a rabbit-themed Animal Motif and/or being compared to a rabbit by others, due to the way his hood resembles rabbit ears more than it resembles All Might's hair and the fact that he wears a rabbit outfit in My Hero One's Justice. When he is portrayed as an anthropomorphized animal by fans, he is more often than not a rabbit, which seems to run counter to Horikoshi's own drawings of Midoriya as a Sweet Sheep.
  • Bakugo is depicted as having a wolf motif, partly due to the popularity of his Halloween promotional image that portrays him as a werewolf, and the winter Alternate Universe showing Bakugo standing next to a wolf.
  • Todoroki is depicted as having a cat motif. This one is a bit closer to canon due to him being shown to like cats and having been drawn more than once with cats around him, as well as being drawn as a cat by Horikoshi once.
  • Ida is sometimes shown as having a dog motif. This partly comes from a sketch where Horikoshi portrays multiple characters as animals, and Ida is a Doberman.
  • Kirishima is often depicted with a shark or crocodile motif. This is most likely because of his sharp teeth, rough skin, and love of meat. Tetsutetsu shares a similar motif for the same reasons. Dragon motifs are also common on account of the fantasy-themed third ending where Kirishima is portrayed as a red dragon that serves as Bakugo's steed.
• Many fanworks feature a Good Cop/Bad Cop relationship and working-style between many characters when they're depicted as a two-man team. The most prominent examples being Midoriya/Bakugo and Kirishima/Bakugo with Midoriya/Kirishima as the By The Book Cops and Bakugo as the Rabid Cop or Cowboy Cop, respectively. Kirishima/Tetsutetsu and All Might/Endeavor also exist but are less common.

Izuku Midoriya

• Drawing future versions of the main characters is very common. Midoriya's future self, however, has been the most popular to draw and many fans have common views on some things:
  • He will cut his hair in the future, while a lot of people like to show him with an undercut, some fans think he will just tame his bush of a hair. To a lesser degree, some think he'll just style his hair and end up looking like Spike from Cowboy Bebop.
  • His updated hero costume will include a cape and there will be more black details.
• It's a common misconception that Midoriya is faster than Ida when using Full Cowl, due in part to the Recap Episode of Season 3 where the two raced and Midoriya won. However, said episode was anime only bordering on Filler, meaning there is no canonical evidence Midoriya is faster. Quite the opposite in fact, as one chapter of the Internship Arc had Ida running on water, a feat that would need Ida to be running 30 meters a second, whereas Midoriya, who was admittedly distracted, was being washed away by the waves.
• Midoriya is frequently depicted in fan art with tons of scars running up and down his arms and across his chest and back. In the actual story, his scarring is almost entirely restricted to his right arm. Many fan fics also portray him having burn scars across his body from years of Bakugo's bullying.
• Similarly, his many broken bones lead to headcanons of chronic pain.
• Midoriya is often portrayed as completely unable to cook, even the most basic dishes or his favorite one, Katsudon. Some fanfics of him as an adult have him having to rely on his mother, his current romantic partner, or convenience store food to eat and have questionable eating habits since he can't make proper meals alone. Some other depictions extend this to poor sleep schedules and being an overall huge Workaholic to the detriment of his health.
• Midoriya, like Ida, is thought by some fans to be autistic. In Midoriya's case, he tends to be awkward in social situations, is totally obsessed with heroes to the point of filling up entire notebooks and ranting about them, tends to mumble to himself when thinking, and, when younger, rocking back and forth when excited (a common form of stimming).
• When he's described in a Shirtless Scene or whenever his skin is shown, it's not uncommon to see Midoriya sporting body freckles to echo his trademark Youthful Freckles, as if he were a redhead with green hair instead of red hair.
• Older versions of Midoriya are often given Nerd Glasses, even though he's never mentioned having sight problems in the manga.
• A recurring idea is that Midoriya wears his eternally-present red sneakers due to a lack of options because with Quirkless people being a minority there aren't many footwear brands that accommodate his extra toe joint.
• Some believe that Izuku could have used 5% Full Cowl immediately if he'd thought of spreading the power across his body instead of concentrating it in one part. In canon, when Izuku discovered Full Cowl, it was exactly as strong as his individual-limb smashes; attempting Full Cowl before learning to dial down his power would have exposed him to 100% Full Cowl with no Eri in sight.
• Many believe that each of his classmates have their own nicknames for Izuku, typically some variant on his name or the color green. Mina tends to call him "Midori", Kyoka calls him "Green", Eijiro calls him "Midobro", etc. AU's and fics where Ochako doesn't call him "Deku" tend to have her call him things like "Deki-kun", in a similar vein to her mistaking "Deku" for a variation of the word "Dekiru" (You can do it), or a shortened version of his given name to denote their closeness like "Izu" or "Zuku".
• Somewhat of a headcanon for BakuDeku shippers is that Midoriya Has a Type, busty blondes (man and women), and his crushes include Mt. Lady, All Might, Melissa, and Bakugou.

Katsuki Bakugo

• To some fans, Bakugo is actually very remorseful about his treatment of Midoriya over the years, which shows up in fics where their relationship (platonic or not) is at the forefront. This would be confirmed when a flashback during the Paranormal Liberation War Arc has him confide in All Might about how he feels he doesn't deserve to be Midoriya's friend, and can only try and help him from afar as a form of atonement. He eventually outright apologizes to Midoriya in the hopes of stopping his self-destructive spiral after leaving U.A.
• After Bakugo is shown to be able to cook, some fans like to portray him as a downright Supreme Chef in the kitchen in contrast to Midoriya's fanon inability to cook at all. This is confirmed in the non-canon Smash!! spin-off, where a side-story shows that he casually cooks restaurant grade meals that floors his school mates.
• When Bakugo's hero name needs to be mentioned in fanworks, fans usually go with Ground Zero. This stems from the fact that Bakugo's early concepts said that this was his hero name. This would be fully jossed, however, once his actual hero name was revealed: "Great Explosion Murder God Dynamight", though fans still use it if they don’t shorten his canon name to “Dynamight”. .
• We've yet to see Bakugo's dorm room at U.A., but most fans speculate he has a ton of All Might merch and/or a Dartboard of Hate with Midoriya's picture tapped to it and a varying number of darts in it. An alternate theory suggests it is also extremely neat, as he makes sure that all dirt, mess, and other such things die!
• It's common to depict Bakugo as a bit deaf or hard of hearing, an extrapolation based on his loud Quirk and his tendency to shout.
• Pairing-wise, due to him being blatantly uninterested in girls, Bakugo is often depicted as gay (often with Kirishima or Midoriya even outside Slash Fic), just firmly celibate or even asexual. If he is depicted as straight, he's only ever paired up with Ochaco (because he seems to respect her to some degree, even though she doesn't look for his company at all) and with Camie (because his brief interactions with her at the Remedial Course were non-aggressive).
• A common theme in fan art, especially parodic ones, is to depict Bakugo with a serious penchant for biting other people, especially Deku. This may come from his common depiction as if he was about to do just that when he screams or when he talks in general.
• There are quite a few fics where Bakugou gets involved in anti-bullying campaigns as a pro hero.
• There are several fics which claim that because of Bakugo sweating nitroglycerin, he usually smells like caramel and/or burnt sugar. However, in real life, nitroglycerin is either completely odorless or smells like bananas. It's unknown where this first started, but it has gained quite a bit of popularity.
• Bakugo isn't exactly clean-mouthed in canon, but fanfics tend to flanderize him into someone who swears enough to make a sailor blush. A Scottish sailor. With Tourette's.

Class 1-A

Ochaco Uraraka

• Much like how Midoriya is believed to have a rabbit motif, Uraraka is believed to have a space motif, in part because of her Quirk, "Zero Gravity", her appreciation for the space motif-ed hero Thirteen, and some interpretations that her helmet was meant to emulate a space helmet. A lot of fan art depicts her being surrounded by space or acting as an astronaut. This received a nod during the Christmas party where her customized Santa hat replaced the puffball with a tiny Saturn.
• Because her parents work in construction and she herself hails from the countryside, Uraraka gets depicted as being able to swear like a sailor if she ever has the inclination, and usually being able to out-curse Bakugo.
• In fics where she and Midoriya master courage to reveal their feelings towards each other, Uraraka often receives the Affectionate Nickname of "Occhan". Whether or not she manages to give a new meaning to the "Deku" nickname, depends on the author.

Tenya Iida

• Iida is depicted as being autistic because of his tendency to shout, accidentally coming off as rude because of his Brutal Honesty, and him always moving his hands when he talks which many interpret as him stimming.
• Whenever Ida is drawn as a girl, he/she is always drawn wearing a hairstyle with two long braids in the back.

Shoto Todoroki

• It's usually believed that Todoroki no longer has sensation in his burnt scars, or has very little, not enough to feel anything but slight touches. This is usually brought up in slash fics between him and Midoriya.
• Some fans believe that Todoroki's left eye is blind, due to the burning and sometimes as a result of mistaking his heterochromia (as flashbacks show his left eye has always been blue) as a cataract. Similarly, fans also believe that he is actually quite hairy and prone to have a beard due to his father's appearance and that his body hair is red on the left side and white on the right, following his hair pattern.
• Older depictions of Todoroki often have him sporting long hair, cementing his status as a Pretty Boy.
• Whenever his future children are brought up, he always produces twins, exceptions notwithstanding.
• A very common theme in fanworks is to have Todoroki turn into a huge Covert Pervert upon discovering sexuality, doubly so if he's paired with Momo.
• A few fanfictions have depicted Todoroki as a conspiracy theorist, most likely in response to him asking Midoriya during the Sports Festival if he is All Might's son.

Eijiro Kirishima

• Kirishima is a very average Nice Guy, if a bit boisterous, but several fanfics like to portray him as having something of a Frat Bro-like personality, with a tendency to call his friends "bro" almost all the time. In canon, he has never called anyone "bro", or any nickname for that matter, and tends to just call people by their name.
• Kirishima being gay is a popular one, even outside of the Slash Fic genre. This may be due to his fixation on masculine men (which is likely a case of Values Dissonance between America and Japan) and the fact that he's rather blatantly uninterested in girls. Him being bisexual also has some popularity due to the previous reasons, plus his interactions with Ashido.
• Kirishima and Ashido are often paired together (either romantically or platonically - the latter especially if he's presented as gay) due to having prior history with each other as schoolmates prior to U.A. Expect most fanon works to have either of them refer to the other as their "horn buddy", referring to Kirishima's horn-like hair resembling Ashido's own horns.

Kyoka Jiro

• Jiro is consistently perceived as a Butch Lesbian in a relationship with Momo Yaoyorozu. In the event this pairing is in play, expect Kaminari (Jiro's most popular straight pairing and hinted canon pairing with her) to play the role of wingman with varying degrees of success, mainly to keep both of them close to each other without it being romantic.
• Jiro is sometimes viewed as being gender nonbinary.
• Whether they are paired up as friends or a couple, Jirou often calls Midoriya by the Affectionate Nickname of "Green Bean".
  • Most fics depict Kyoka's dad, Kyotoku, to play the Boyfriend-Blocking Dad whenever Kyoka and Izuku are dating.

Denki Kaminari

• Kaminari is often portrayed as being a good friend of Bakugo in fan art due to his friendship with Kirishima, even though the two of them have never really interacted outside of their scene together at the start of the USJ Arc where Kaminari says that like the majority of his classmates, he dislikes Bakugo. In Chapter 107, Kaminari shows that he respects Bakugo, and considers him one of his mates, so it might be a case of Ascended Fanon.
• Some fans believe Kaminari has dyslexia thanks to always overusing his Quirk and temporarily turning his brain to mush. This is why he scored the lowest in class yet has an impressive vocabulary when trash-talking Bakugo.
• Similarly, he’s sometimes portrayed as having ADHD due to his personality and energy.
• Kaminari being related to various minor characters who have a similar hairstyle to him and/or an electricity-themed Quirk:
  • Electoplant, an American pro hero from Two Heroes with an electricity Quirk and a black-and-white hero costume.
  • The man in the Shie Hassaikai taking care of Eri, who has short, spiky blonde hair with a jagged black streak.
  • The electric-themed pro heroine who appears fighting Dabi at the beginning of Heroes Rising. She has hair similar to Kaminari's, as well as an electric Quirk.

Mina Ashido

• Ashido's first choice of hero name, Alien Queen, is a lot more popular than her current alias of Pinky. In fan art, fanfic, and discussions, it's far and away more common to see her referred to as Alien Queen.
• It's a commonly held belief that Ashido was a Bully Hunter back in Middle School thanks to Kirishima's flashback showing her confronting a pair of bullies he failed to stop, and that because of that, many believe that if she knew about Bakugo's history of bullying Izuku, she'd immediately cut ties with him and grow to hate him. The flashback however explicitly showed she befriended the bullies after convincing them and their would-be victim to dance with her, Kirishima's friends even comment that that's just the kind of person she is: able to make friends easily with anyone, with her interactions with Bakugo demonstrating this, namely in that while his surly attitude can frustrate her, she doesn't hesitate to try and get him involved with everyone like during the Christmas party.

Momo Yaoyorozu

• Yaoyorozu is portrayed as bisexual if in a relationship with Jiro.
• When she receives Adaptational Modesty, her costume is often remade in a material easy to tear off similar to Midnight's, or simply with velcro and zippers.
• Since her Quirk works as Cast from Calories similar to Fatgum, she is often mentored by the BMI Hero. Due to her level-headed and analytical mind, Momo sometimes is also mentored by Edgeshot, becoming a stealth expert as well.
• Fans who ship her with Todoroki often claim that the two of them knew each other from way before U.A., mostly from events where the Yaoyorozus and Endeavor often attend, sometimes from Endeavor's part, these meetings act as a way to match the two of them (as part of planned Quirk Marriage, when Endeavor is not liked by the author).
• Speaking of family, the Yaoyorozus are often depicted as the richest family of Japan and one of the richest families in the world. While they are certainly rich, there is no argument about that, and have the influence to be part of the I-Island company boards, how rich they are isn't defined. The only certain thing is that they are in fact rich.

Others

• Many fans exaggerate Mineta's status as The Friend Nobody Likes. While it's true that some of his classmates (especially the girls) dislike him for his perverted behavior, he's good friends with Kaminari and Midoriya, especially Kaminari for both having an affinity of being womanizers and he's also friends with, to a lesser degree, Sero, Shoji, & even Tsuyu. The rest of the class does manage to be nice to him every now and then, and in turn, he's shown to be on good terms with them as well, despite how much of a pervert he can be. The only ones who actually seem to hate him appear to be Yaoyorozu (which is justified due to her being the most frequent target of his harassment) and Bakugo (who Hates Everyone Equally).
• In fanworks, Tsuyu will often catch flies with her tongue and eat them as a frog would. The number of times she does this in either the anime or manga is pretty much zero. And when she's shown eating, she actually eats normal food like everybody else.
• When Tsuyu and Tokoyami are drawn as small children, fan artists will often draw the former with a tadpole tail and the latter with soft, fluffy head feathers for Rule of Cute. Some fans also believe (with varying degrees of seriousness) that Tokoyami hatched from an egg when he was born.
• Hanta Sero is almost always chipper, has a liking for hammocks, usually wears loose-fitting clothes when off-duty, and is a smiling and upbeat Mellow Fellow in a class that is often described as high-strung due to being often targeted by villains. Thus, fanworks often describe Hanta Sero as a weed-smoker, albeit a rather smart one given his average-to-good grades.

Other Classes

Hitoshi Shinso

• Due to his eye bags, it's generally believed that Shinso has some sort of sleep disorder, specifically, insomnia, but darker fics tend to also give him things such as sleep paralysis.
• It's extremely popular in Fan Works where Shinso lived in foster homes for the majority of his life and how terribly they treated him because of his "villainous" Quirk. Darker fics take this even farther by having his foster parents muzzle so he won't be able to use his Quirk on them. This is especially prevalent when fans want Aizawa to happily adopt him because they want him to have a much more supportive environment to thrive in.
• He hasn’t got a canon hero name yet but the one most often used by fans is Mindjack.

Others

• Setsuna Tokage
  • Setsuna is often depicted as having a fascination/obsession with dinosaurs, drawing from the reptilian motif of her name, Quirk, and costume as well as her profile given in Volume 22.
  • Given her similarity in both looks and personality with Midnight, Tokage is often decipted as a Lovable Sex Maniac and Shameless Fanservice Girl that loves to tease everyone, specially Midoriya, if she is one of, or his main love interest. Speaking of Midnight, in many cases she is presented as being her Setsuna's aunt, since that actually makes more sense than being her mother.
• Monoma's rivalry with Class 1-A is often believed to extend to all of Class 1-B, they just don't make it obvious. This, however, is false, as while there is some Friendly Rivalry between the two classes such as Kirishima and Tetsutetsu, or Yaoyorozu and Kendo, for the most part, the two classes are amicable. Additionally, Class 1-B generally finds Monoma's antics with Class 1-A to be annoying and/or concerning.
• According to Horikoshi, Ibara Shiozaki was originally slated to be a member of Class 1-A. Fans mistakenly believe this was changed due to him finding her hair difficult to draw, as both statements came from the same character brief. However, Horikoshi simply stated in the brief that he couldn't remember the exact reason, something that would be unlikely if it was connected to the aforementioned hair issues. Additionally, quite a few fans believe that Shiozaki is a Catholic, while in canon there's no real indication of what denomination she is a part of.^note Not an unreasonable assumption, given that Catholocism has a much longer history in Japan than any other denomination (and from a Doylist perspective it's the denomination that Japan's vast non-Christian majority, including the author, are most familiar with), but Catholics are no longer the majority of Japanese Christians. Her hero name originally being Maria in development lends credence to this since Catholicism is known for its veneration of Mary, but it is not the only denomination to do so.^note Reverence for Mary can also be seen in Orthodox, Lutheran, and Anglican denominations
• Fans assume that Itsuka grew up being trained on martial arts, sometimes she is even the Heir to the Dojo for her family.
• Kodai is presented as a tokutatsu fan, given her outfit is a Shout-Out to Ultraman. She also decipted as The Comically Serious and a girl who uses her stoic looks to hide her Covert Pervert tendencies.
• No real reference is made to Mirio's size, but due to his shamelessness when his clothes drop and status as Mr. Fanservice, the general belief is that he has a Gag Penis.
• Fans believe that Nejire was bullied due to her Constantly Curious personality before getting to U.A., with Yuyu Haya being her Only Friend. This becomes a Zigzagged Ascended Fanon. Yes, Nejire was bullied, but after getting to U.A., and it was because everyone thought she looked down on them due to her powerful Quirk. In fact, she was pretty much a Shrinking Violet before meeting Amjiki.
• Many fans believe that the students who end up in Gen Ed studies are all those who failed to get into the Hero Course. The idea likely stems from Shinso trying and failing to get in. With him, however, it's explicitly stated that he applied for both courses, and there's no indication that the other students in Gen Ed did the same. It's also been mentioned that Gen Ed is designed for students aiming for college and other careers, so it's possible that the majority of students in that course simply aren't interested in being a hero but still want to attend Japan's most prestigious high school.
• There's quite the fan belief that Tetsutetsu and Kirishima, for being so similar in Quirk and personality and sharing the same date of birth, are twin brothers separated at birth.
• Mei Hatsume is believed to be autistic and, possibly, to have ADHD. This stems from her overly enthusiastic personality, her genius at engineering support items for heroes, and her disregard for "normal" social interactions. Some fans find this Alternative Character Interpretation problematic because it makes it seem as if any woman who doesn't have a meek or otherwise subdued personality must be neurodivergent, which comes off as misogynistic. On the other hand, the autistic community is rather tired of having genius characters as their only representation because it makes people think autism equals prodigious intelligence, which is not the case. While there are gifted neurodivergent people, the subjects they fixate on are not always "useful, genius stuff" such as maths or engineering — e.g., fixating on one fandom, the societal changes in some region of the world, or building miniature trains. The fans that support this take on her view it as either unintended representation or as the valid and righteous appropriation by under-represented minorities.

Pro-Heroes

Faculty

All Might

• More often than not, All Might's "Muscle Form" is believed to be a result of his using One For All, and has in turn caused the idea that Midoriya will also gain a similar state. However, All Might's "Muscle Form" was his original natural state as a result of training and using One For All. It was only after he suffered serious injuries at the hands of All For One did he become emaciated, and he could only restore his old form with the embers of One For All, not because of it being a power of One For All, but because, as he put it, it's like flexing and puffing out his chest.
• Some have taken to believe that All Might, due to the huge amount of Western comics Homage he shows in design and personality, is of American-Japanese ancestry and genuinely has ties to the USA, either through family or being raised there. Volume 0 and My Hero Academia: Two Heroes show his backstory is a little different — All Might is originally from Japan, but he lived in the U.S. for some time after graduating and began his hero career there; hence, the reason why all of his signature attacks are American-themed.
• All Might saying he saw Nana Shimura as though she were his own mother has some fans believe he either grew up with a Missing Mom, if not orphaned, or had an abusive and/or neglectful mother. The manga would later clarify that his parents had been killed in the chaotic era of his childhood before he met Nana.
• Villain fics often call him All Smite as a villain.

Eraserhead

• Some fans believe Aizawa used to be in Gen Ed studies before moving to the Heroics department due to his Quirk not being particularly useful during the entrance exam and his general distaste for it.
• It's certainly not uncommon for fans to believe Aizawa used to come from some sort of broken home that consisted of either parental abuse or neglect in some form due to his general attitude in life.
• Many fans tend to think Aizawa refers to Midoriya exclusively as "Problem Child", to the point of making it an In-Series Nickname. In truth, it's a case of Beam Me Up, Scotty!, with him only ever calling Midoriya that once in canon, and as a term of endearment.
• As the metric by which he graded the students during the Quirk Apprehension Exam is never explained, a commonly seen fanon is that Aizawa rigged the results to put Midoriya in last place out of personal dislike for him. This is used to explain exactly how Izuku could somehow get dead last despite doing pretty well at the ball toss and presumably average at everything else, especially when compared to others that scored higher than him like Jiro, Hagakure, Mineta, and Koda, all of whom don't have the means of using their Quirks to enhance their scores much aside from Mineta doing the side stepping, as well as falling in line with Aizawa's shown disapproval of Izuku during the entrance exam, and singling him out for "half assing" things when not doing the same for Todoroki for only using his ice. The reasoning for this in fanfics tends to differ, with those using a more sympathetic Aizawa having him change his mind about Izuku after the ball toss, leading to his declaration no one would be expelled much like in canon. Those that go for a more unsympathetic take have someone figure out Aizawa rigged the scores and taking him to task for his bias, especially if he actually went through with expelling Midoriya, didn't reenroll him immediately after like his canon expulsion scare tactic, and no one managed to stop him, such as in Peace's Apprentice.
• Like Midoriya, Aizawa is sometimes portrayed as autistic due to his introverted personality and logic-based thinking, common autism traits.
• His love of cats gets him frequently given a cat motif like the student animal motifs.
• Like Midoriya, he’s often shown as having chronic pain thanks to his many injuries on the job.

Present Mic

• There are surprising numbers of fans who believe Present Mic is hard of hearing and using hearing aids, judging by the Archive Of Our Own tag. It’s likely because he’s the other character with a tendency to shout and perhaps prolonged effects of his quirk and use of what appear to be noise-modulating headphones in his costume. Though conversely, it's equally common to assume he has excellent hearing as a Required Secondary Power to properly control a sound-based quirk.
• Like Shinso and Aizawa, he’s frequently portrayed as having a rough childhood and Abusive Parents or foster parents. Similar to Shinso, muzzling is sometimes involved. Sometimes it leads to bonding with Shinso.
• Fans speculated that Mic isn't straight, with him being commonly portrayed as either bisexual or pansexual. This theory is somewhat confirmed in the light novels, where he can be seen flirting with both Thirteen and Vlad King. This flows well into the most popular pairing for him, which is Aizawa.
  • Another way Present Mic is portrayed is as either nonbinary and/or genderfluid, with some fans even headcanoning him as transgender.
• Before the reveal of the traitor, Mic was one of the most common characters to be written as the traitor. “Traitor Yamada Hizashi” is an entire Archive of Our Own tag.
• Mic’s high energy makes him another common ADHD portrayal.
• It really isn’t seen in canon but he’s portrayed as having quirk slips when he gets mad or excited. Aizawa will often be shown erasing his quirk to mitigate it.
• A variety of theories exist regarding whether he’s mute or even can’t breathe without his quirk.
• We don’t really see it in canon but his radio host job lends itself to frequent headcanons that he’s a music lover and has a music room at home or even makes albums.

Others

• Fans believe that the group of adult heroes in the manga has all studied in U.A. together. Particularly, All Might, Aizawa, Present Mic, Midnight, and Endeavor. The relationship between All Might and Endeavor would also have been similar to Bakugo and Midoriya, but Endeavor would openly want All Might to join him so they would become stronger than anyone else. There is something to this theory; Aizawa and Present Mic were in the same class, and Mic was the one who came up with Aizawa's hero name, Eraser Head. Vigilantes would later confirm that Midnight was an upperclassman to the two. Some fans also believe that Endeavor's obsession with All Might started in high school, with some falling out between them causing it. Shippers think that they are exes that ended on poor terms. However, canon later shows that All Might held One for All for forty years and had received it as a teenager, making him about a decade older than Endeavor, and over twenty years older than Aizawa, Present Mic, and Midnight.
• Some believe that Tensei Ida, Midnight, and the duo of Aizawa and Present Mic were in the same class due to all of them being the same age. Vigilantes confirms that Midnight was a year ahead of Aizawa and Present Mic while Tensei's status is still unknown. This can extend to them watching/babysitting Tenya when he was growing up, and Tenya knowing them on a personal level but choosing to stay professional while at school.
• Midnight is portrayed as having a pretty active and casual sex life and is the one relegated to teaching sex ed to U.A. students. Some shippers like to add Aizawa, Mt. Lady, and/or All Might to her list of casual partners.
• Snipe is thought to have still gone through some version of the events of the My Hero one-shot, with him getting a job at U.A. after the end. To a lesser extent, he keeps in contact with Jack, who himself is usually headcanoned as part of the Midoriya clan or an Identical Stranger to Deku.

Others

Mirko

• She is sometimes believed to be vegan by fans, due to how rabbits can't eat meat. Her profile also lists carrots as her favorite food.
• She is often depicted as being Ryukyu's best friend, due to both being heroes with animal motifs and the only female heroes amongst the Top 10. She is also often depicted as Hawks friend, sometimes his first and Only Friend, to the point he confides her with details of his life under the Commission's clutches.

Other Heroes

• It was once nigh-universally accepted that Endeavor treated Rei as a Breeding Slave, repeatedly raping her for the sole purpose of producing a child who could surpass All Might. Even this very wiki presented this as fact in some examples. While his abusive behavior, as well as his Vicariously Ambitious motivation, made it understandable to assume that Endeavor never viewed his wife and children as anything more than a means to an end, this was never actually stated. Later chapters would contradict this by revealing that Endeavor and Rei truly loved each other for most of their relationship, that Rei herself wanted more children so they could support each other, and that Endeavor only turned abusive after Shoto was born, at which point he had no need for further children.
• There are many speculations about Ms. Joke and Aizawa's past as pro heroes, the most common one being that they would actually work together a lot despite belonging to different agencies, which started their usual dynamics.
• Despite the incredibly strict laws against recreational drug use in Japan, Hawks' very odd demeanor in the series sometimes leads fans to depict him as The Stoner. Not helped at all by a mistranslation of the manga where he straight up says he wants to "roll up a joint" (this turned out to be false, he was simply stating he wanted to relax).
• A somewhat common misconception is that Mt. Lady was one of the heroes who chewed out Izuku for his attempt at saving Bakugo from the Sludge Villain. The only named heroes who did that, however, were Death Arms and Kamui Woods, as Mt. Lady was busy aiding in collecting the body of the Sludge Villain after All Might scattered him. One possible reason for this misconception may be owed to how, before the creation of the Lurkers group and they being associated with Edgeshot, Mt. Lady and Kamui Woods were initially depicted in a trio with Death Arms, causing some to conflate the actions of Death Arms and Kamui Woods towards Midoriya as involving Mt. Lady too.
• A common misconception, and frequent Fandom-Specific Plot fuel, is that the heroes present at the Sludge Villain attack were willing to let Bakugo die since none of them had a "compatible Quirk" for dealing with the Sludge Villain. The only one that could really be seen as guilty of that though is Death Arms, who was standing back after being knocked around once up until Izuku ran in. Of the other named heroes, however, Mt. Lady couldn't do anything since the road was too narrow and littered with injured people for her to gigantify, so she'd be no more useful than a Quirkless civilian, and was explicitly a rookie still, making her less experienced in this kind of situation, while Kamui Woods was at risk of being burned due to being wood-based yet was still rescuing civilians, and Backdraft was preoccupied both with keeping other civilians from getting too close to the flames, and putting out the flames. None of them was willing to let Bakugo die, there was just literally nothing they could do in that situation.
• In canon, the Hero Public Safety Commission manages relations between heroes and police, the distribution of hero licenses, and handles cases involving the most dangerous criminals. They also hid some major dirty laundry in the name of maintaining the facade that society was in a time of peace, as while publicly they appeared to be reasonable, they were grooming kids with powerful Quirks like Keigo Takami and Kaina Tsutsumi into the rising star pro heroes Hawks and Lady Nagant, before then using them as their agents, espionage for the former and assassination for the latter, then tossing the latter aside after attempting to kill her when she grew tired of the lying and killing. Aside from that though, the HPSC did not intersect with the main cast. In fanon, however, they are more along the lines of Vought, often cast in a much more deliberately antagonistic role, depicted as Obstructive Bureaucrats, having a very antagonistic relationship with U.A. via Nezu, and caring less about keeping the public safe and more concerned with maintaining control, in turn being much more openly corrupt, even suggesting that Lady Nagant was not their first attempt at a groomed pro-hero, and they'd be entirely willing to recruit any of the students at U.A. were it not for Nezu. In fics where Midoriya doesn't have One for All or any Quirk, the idea of a Quirkless hero is so outrageous against the status quo, that HSPC is constantly attempting to ruin his life before he graduates, and failing because of Nezu's, who is often his mentor, intervention. There is also the belief that not only the Commission was well aware of Endeavor's domestic abuse, but they covered everything up, from Toya's death, to Shoto's accident and Rei's incarceration at the mental hospital, in order to not let the image of the Number Two Hero be tarnished. In most of the times, Endeavor is represented as their most trusted and loyal asset, that the Commission intends to plant as the next Number One hero to have further control over society.

Other Characters

Villains

All For One

• All For One taking Shigaraki not only out of spite toward the One For All users' legacy but also as a Replacement Goldfish for his brother is popular. The main reasons for this include Shigaraki having a resemblance to All For One's brother, especially once he has fully white hair, and the fact All For One's bond with Shigaraki is manipulative and self-serving in a similar way to that between All For One and his brother since All For One seems to have some level of care for them. Whether he does care but has an unhealthy and unempathetic mindset about it or doesn't care about them at all is dependent on the work's interpretation.
• The idea that All For One sexually abused (or at least groomed) Shigaraki is fairly common in fan works. Much of this is owed to the fact that All For One is already an unhealthy and manipulative father figure to Shigaraki, in addition to the fact it makes the already Tragic Villain Shigaraki's life that much more horrible. All For One possessing Shigaraki's body later in the story only added to this.
• It's also widely assumed that All For One caused Shigaraki to accidentally kill his family (aside from his abusive father, who Shigaraki very deliberately murdered). The timing of Shigaraki's initial Quirk activation was just too perfect for breaking the boy and allowing All For One to corrupt him, and All For One is known to have "Forced Quirk Activation" as one of his stolen Quirks. Plus, its just the kind of over-the-top vile thing he would do.
• All For One's exact age and how long he's been a villain have never been explicitly stated, due to his having a Quirk that extends his lifespan, but Conversations with a Cryptid popularized the idea that he's at least two hundred years old, and most fanfics run with that number. It's also assumed, in the same vein, that said Quirk makes him functionally ageless, and that he could theoretically live forever. Chapter 270, however, disproves this by revealing he only gained the Longevity Quirk seventy years ago, meaning he's one hundred and sixty at most, and that it only doubles a person's lifespan, rather than extending it indefinitely.

League of Villains

• Since Shigaraki's Quirk permits him to destroy everything he touches with all five fingers and can't be deactivated, which in turn caused him to kill his whole family by accident when his Quirk manifested, it is believed that he fears or Hates Being Touched.
• The idea that Dabi is actually Toya Todoroki is so popular that it's accepted as canon by some fans. This has been confirmed as canon thanks to the events of Chapter 290.
• Due to the fact that they look identical to each other and have the same voice actors in both the Japanese and English versions, plenty of fans believe that Dr. Tsubasa, the doctor who diagnosed Midoriya as Quirkless when he was four, and Dr. Garaki, All For One's Mad Scientist and the Nomus' creator, are one and the same. This, in turn, led to a bunch of other fanon bits derived from this one:
  • Many people believe that Midoriya was never Quirkless; Tsubasa/Garaki arranged for his Quirk to be stolen by All For One, then falsely diagnosed Midoriya as Quirkless.
  • Due to the fact that it was never mentioned beyond that scene, many fans believe that the extra toe joint is either an old wives' tale with little to no scientific evidence to back it up, or a downright lie Garaki came up with in order to justify his false diagnosis.
  • After the revelation that Aoyama was born Quirkless and was given Navel Laser by All For One in exchange for becoming a spy for him, the idea that said Quirk used to originally belong to Midoriya gained some traction.
  • It is believed that the winged Hosu Nomu is Tsubasa, a winged kid who used to be part of Bakugo's Gang of Bullies. Lending this theory credence is that, on top of being Dr. Garaki/Tsubasa's grandson, Horikoshi seemingly hinted that the two are one and the same in an omake in Volume 7.

Meta Liberation Army

• Since their introduction, the Meta Liberation Army has frequently been depicted in fanfics as being extremely biased against the Quirkless and even using their positions of power in society to censor the exploits of Quirkless heroes and individuals. If Midoriya is some sort of Quirkless notable they will appear earlier than canon and be racist against him for it while trying to obscure him from the general public. Outside of Geten, and later the skull-masked PLF lieutenant mentioning social Darwinist views about one's place in society being determined by one's Quirk, the army members have never said anything that can be used to extrapolate this behavior and this is simply used to add more active anti-Quirkless discrimination.
• To add fuel to their villainy, Detnerat is often decipted as an Evil, Inc. that not secretly provides weapons disguised as Support Items to the black market, but also refuses to provide services to groups they hate, like mutants and Quirkless people. They are also presented as an Incompetence, Inc.., providing floppy and poorly made products to civillians and heroes. Fans even go as far as blaming them for Yaoyorozu and Hagakure's costume designs if the writer wants to have them changed and desires to blame someone for what they don't like about said costumes.

Main Characters' Families

• Inko is sometimes portrayed as resentful towards how Bakugo treated Midoriya over the years, and only wouldn't have taken any action because her own son kept stopping her and creating excuses for him.
• For many fans, Inko and Mitsuki were childhood friends, with their relationship being different to that of their children, with Mitsuki being a Hot-Blooded Japanese Delinquent, while Inko was the Cloudcuckoolander's Minder who stopped her from getting into fights. Some also add Masaki to the mix and showcase them as high school sweethearts. Some fans take this a step further. Despite Bakugo treating Midoriya terribly over the years, he has high respect for Inko. This is thanks to his mother's influence and Inko managing to raise her son all by herself. He even goes so far as to call her "Aunty Inko".
• Hisashi Midoriya is frequently portrayed as being almost totally absent from his son's life to the point that Izuku can't even remember his face. While this is somewhat justified by Hisashi's status as The Ghost in the story, it's more than likely that there are at least a few family photos of him lying around the apartment.
• Before Toya's name was revealed, many fanfic writers opted to call him Ryota Todoroki or the short form, Ryo.
• Toya and Fuyumi being twins was a popular assumption before it was confirmed they are a year apart. Fan works that use this idea also sometimes give Fuyumi the inverse condition of Toya's Quirk, inheriting Rei's ice Quirk but having weakness to frost and heat resistance. While it was later confirmed Fuyumi does have an ice Quirk, a comment from Natsuo about him and Fuyumi not doing well in the heat debunks the latter part.
• It is fairly common for fan works to depict Natsuo as Quirkless. This is likely due to the fact that it took much longer for his Quirk to be revealed than it did for his siblings, so until that reveal, it was possible to assume he didn't have one.

Other

• In many fanworks, Naomasa Tsukauchi was depicted as having a Living Lie Detector Quirk due to his job as a police officer and his sister's Quirk being one as well. Some, however, depicted him as being Quirkless due in part to All Might's initial suggestion to the then Quirkless Midoriya to join the police force. The former was turned into an Ascended Fanon when the official data book reveals that his Quirk is indeed a Living Lie Detector.

Expanded Universe Characters

• Some fans believe that Koichi, the protagonist of Vigilantes, continued a friendship with Tensei Ida well after the events of that spin-off. A lot of fan art depicts them meeting after Tensei's accident and Koichi often visiting Tensei in the hospital and afterwards.
• The Transplant characters from Horikoshi's previous work are sometimes believed to know each other.

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