History Fanfic / OniGaShikuSeries

* AdaptationalBadass: Tsukauchi is a NonActionGuy in canon, but here he [[spoiler:helps Izuku in an all-out brawl against the entire Yamikumo clan]].

** Whenever an unusual situation happens, except something along the lines of "most people would do this. [insert name here] was not most people."
** Izuku running into Chinpoko-chan, Oshiri-chan, and Kogan-chan at the most random moments and beating the crap out of them in seconds. [[spoiler:[[RunningGag The gag comes to an end]] when he runs into them while rushing to save his mom from her kidnapper and they waste him what could be precious time. This is the last time they're seen.]]

* EveryoneIsATomato: Izuku thought that his family was normal and that his uncle was just eccentric. Then [[spoiler:the Akatani arc]] happens, and he finds out that his entire family and most of their family friends are deeply involved in the yakuza.

** Izuku as the "Mad Dog of Shizuoka", after [[spoiler:he goes viral online for cackling like a madman while beating down the Yamikumo clan in Tokugawa Castle.]]

* AdaptationalSkill: This version of Izuku has martial arts training (while he has none in canon), is a good dancer, is fluent in English, can switch accents at will, and is learning Korean. It's never implied in canon that something is ''preventing'' him from acquiring such skills - he just never bothered to learn there.

* {{Workaholic}}: Mei is so focused on her work that Izuku has to physically carry her to the UA cafeteria and spoon-feed her her lunch while she's working because she won't remove her hands from her "babies" on her own accord. [[spoiler:It takes a turn for the tragic when Izuku gets injured in the USJ, and Mei works herself to the bone because she thinks it's all her fault for not making good enough gadgets.]]

* MinorLivingAlone: Hisashi and Inko shared an apartment during their hish-school years without having any adults around. Majima paid for rent and utilities for a year.

* MistakenForMurderer: Izuku defeats Katsuki in the battle trials by using Maijma's Heat Action in which he snaps the opponent's neck to knock them out. Understandably, All Might and the rest of 1-A think that Izuku actually murdered Katsuki. It takes Izuku kicking Katsuki a few times until he groans from the pain to convince them he's not dead, and even afterwards the whole thing appears to be something of a TraumaButton to the rest of the class - at least Jirou. Aizawa tells Izuku that he needs to work on that hold because the words "hero" and "snapped neck" usually lead to memorials and lawsuits.

* OhAndXDies: The title of the chapter "Spoiler Alert: Katsuki Bakugo Fucking Dies". He doesn't actually die, Izuku just uses that hold Majima has that looks like he snapped someone's neck. But it sure ''looked'' like he died, to the absolute horror of the rest of 1-A.
* OnceDoneNeverForgotten: Izuku is thought of as something of a MemeticPsychopath InUniverse amongst those affiliated with the UA because of the time he used Majima's neck snap Heat Action on Katsuki. Whenever anyone ponders or brings Izuku's character into doubt, the neck snap is the one thing they talk about. Even ''All Might'' questions Izuku's character over that takedown.

* AbortionFalloutDrama: Majima and Mirei are both still traumatized by Mirei's decision to abort their child without telling him for the sake of her idol career, leading Majima to divorce her. Both are still devastated over it many years later. When Majima met Izuku the day of his birth he had to forcibly shut down his "this is what you could have" thoughts, and Mirei takes to seeing Izuku for the first time like a gut punch - especially since her career got ruined anyway, making the abortion AllForNothing. Despite all this, they are AmicableExes.

** Izuku, BIG TIME. He starts as overly shy and with a habit to mumble as per canon, but over time he becomes extremely confident, flirty, rather vulgar if the situation calls for it, and does not fanboy as much as in canon. After [[spoiler:Kiryu fakes his death]], Izuku takes to emulating his uncle's "mad dog" persona as much as possible. In a hilarious inversion, he's the one who now harasses Katsuki. His original personality is hidden under many, ''many'' layers.
** A minor one with Aizawa; in canon, he makes a point of never reading his students' files from previous schools because he doesn't want to be biased. In this fic, he decides to read Izuku and Katsuki's files upon finding out they're from the same school, and purposefully puts them in the same class so he can expel one of them. That doesn't happen.
* AdaptationRelationshipOverhaul: As a result of Izuku being out of Katsuki's life for almost ten years, he doesn't make "friends" based on him and the others bullying Izuku, so as a result none of his classmates like him and now ''he's'' the class reject. Katsuki doesn't really care though.

* AffluentAscetic: [[spoiler:Right before Akatani turns himself in for good, he transfers half his stocks to Izuku. Izuku, being ten, already living a comfortable middle class lifestyle, and not knowing how to process this newest development, hands over his new stocks to Akiyama for day trading. He gets the money back (much, ''much'' more money than the original amount) five years later right before UA, but once again, instead of using that money for himself, he instead [[AnonymousBenefactor anonymously donates a hundred million yen to Haruka's family]]. It's unclear if Izuku has kept any of the money, but he certainly hasn't used them for himself.]]

** This is how Izuku relays to All Might the story of how he ended up cleaning the beach; he says that one day a strange man in an eyepatch brought here a confused four year old to do "a hero's duty" to clean the trash left behind by others, and how that boy was subjected to hellish training and made many friends along the way. All Might quickly picks up that Izuku is talking about himself.

** Majima and later Izuku are the "mad dog"; a snarling and cackling rabid dog in a cage. It becomes somewhat literal for Izuku when [[spoiler:a statue of a snarling dog is erected in his honor at the gates of Tokugawa Castle.]]

** Kiryu leans more towards MythicalMotifs with his dragon association; it takes [[spoiler:Haruka's life being threatened]] for Izuku to start seeing him as a ''human'' rather than a pillar of strength. And even so he still doesn't feel he's on the same level as a person with Kiryu and calls him a dragon in front of others.

* ArsonMurderAndJaywalking: Izuku training of how to spot weapons by observing the Majima construction crew has some interesting results.

* ArtisticLicenseChildLaborLaws: Izuku starts working as a part-timer in Sky Finance at age ''ten'', while in real life it's illegal to employ anyone under the age on fifteen (yes, this also applies in Japan). While none of the major characters is what you'd really call a law-abiding citizen, Sky Finance is supposed to be a legitimate business. And yes, there is an actual contract drafted between Akiyama and Izuku too.

* BadassNormal: None of the big Yakuza players, like Majima, Saejima, or Kiryu have quirks. And neither does Izuku. Yet each and every one of them is easily an OneManArmy.

** As per canon, All Might saves Izuku and later Bakugou from the Slime Villain just at the nick of time.

* BoyfriendBluff: The "Be My Boyfriend" substory has Izuku pretend to be his classmate Chisato's boyfriend for an evening in a cocktail party full of rich people to deter her {{Abhorrent Admirer}}s from approaching her.

** Fourteen year old Izuku is all too pleased to imagine the ladies working in Purgatory in the same poses as the ladies in the shrink-wrapped magazine he was given ten years prior.
** When Izuku is given the maid outfit, he thinks to himself that this better not awaken anything in him. By the end of that substory he decides to keep it.

* BroughtDownToBadass: Even out of his All Might form, Yagi is a highly skilled martial artist with far, ''far'' greater strength that his frame suggests and easily capable of wiping the floor with Izuku, who is a monster in his own right.

** Majima's cited reason for making Izuku clean the Beach Park is that it's a man's civic duty to separate his garbage. Exactly like one of his ''Yakuza Kiwami'' encouters.
** One of the things Kiryu gifts Izuku when he's to return to Musutafu is the ''[[EntertainmentAboveTheirAge shrink-wrapped magazine]]'' of all things. With strict instructions to never open it until he's five years older (Izuku is ''four''), and to keep it a secret from absolutely everyone. He even instructs Izuku ''not'' to hide it under his bed because it's not an effective spot!
* CallForward: In the flashback of Majima meeting Hisashi for the first time, Hisashi gives Majima a lecture on environmental perservation that scares him shitless. In both the fanfic and the canon games, which take place several years later, Majima is extremely strict about preventing littering.

** There was one time when Akiyama locked Izuku in the batting centre with Saigo and let the military nut fire rubber bullets on poor Izuku.
** Izuku meets Nick Ogata in a party.
* CharlesAtlasSuperpower: Izuku goes through hellish training, but within a few months his physical abilities surpass whatever other four year olds can manage, and he's an outright monster as he grows older. The same applies for most Heat users, who have outright superhuman abilities due to, well... a shit ton of fights.
* ChekhovsGift: When Izuku goes to vacation at the Morning Glory orphanage for the first time, when he leaves one of the gifts Kiryu gives him is Nishiki's lighter. Around two years later, [[spoiler:that lighter takes a bullet for him and saves his life.]]
* ChekhovsGun: In the first chapter, Majima mentions that his company took a contract from UA to build them a "situation training" facility. Around thirty chapters later (and over ten years in-universe), Ochako mentions that her family's construction company lost on a very big contract around ten years before, and earlier she is glaring daggers at the "Majima Construction" plaque at USJ. It's not clear if Izuku has made the connection between the two events.

* ConfusionFu: Majima is stated repeatedly to be extremely unpredictable, and it's a trait that Izuku picks up easily. The narration even states that Izuku's on his way to become the world's most unpredictable hero.

** At one point Izuku makes fun of Kiryu's shortly lived "Judgment Kazzy" carreer after Kiryu quotes the lyrics at him.

* CrazyPrepared: The Florist's security for the monitor room, on top of the handprint, now has face recognition, voice recognition, key phrase locking and weight sensors, just in case.

** [[spoiler:Musashi's father was an alcoholic gambler and his mother abandoned them both. Figuring that he was already coming from shit, [[ThenLetMeBeEvil he ought to be even shittier]], so [[TheRunaway he ran away from home]] at eleven, joined an underage gang, and by the age twelve he was running errands for the local Yakuza. And ten years later, that family orders Hisashi to [[{{Patricide}} murder his own father]]. Which he does. And it messed him up for life. And this was before he became a killer for the Omi and his wife [[DeathByChildbirth died in childbirth]].]] [[EvilParentsWantGoodKids No fucking wonder he doesn't want his son to follow on the same path.]]

** [[spoiler:Inko ran away from the orphanage and was picked up by Yuya's Black Thunder biker gang for a while, resorting to picking pockets with her quirk and other kinds of small-scale theft. She also got separated from the gang while they were evading the cops, so she ended up being on the streets on Sotenbori before she tried to pick pocket Majima.]]

** Hisashi Midoriya is a certified genius, given that he's the head researcher of I-Island's Quirk theory and development department, but socially, he's a complete dunce. It doesn't even occur to him that leaving away from home when his four year old son just received a devastating diagnosis and never contacting him would be a bad idea because he assumed Izuku "needs space", and he can't quite grasp that intelligence doesn't equal emotional maturity. Majima gives him quite the TheReasonYouSuckSpeech to him over this and commands him to call Izuku for an hour at least once per week.
** Mei Hatsume is an absolutely brilliant budding support engineer, but she has next to no social awareness (as she calls her inventions "babies" and doesn't understand why some people may misunderstand what she means), and completely forgets to eat or sleep when she's working. Izuku has to force feed her to make sure she's receiving proper nutrition. And that's nothing to say of her fondness for explosions.

** One of Akiyama's clients is a woman who wants to open a maid cafe, so naturally his test for her is to have her manage a pre-existing maid cafe for a day to see first hand how she runs her business ([[spoiler:and defends her staff]]). And who is the Sky Finance employee who goes to check how things go? Hana? Nope! It's Izuku forced into a maid outfit by Akiyama and a couple of female friends of his.
** A more benevolent example occurs after [[spoiler:the USJ, when Midnight takes Izuku aside after school hours and teaches him how to do his own makeup so he can take his mind off things for a bit. Izuku admits that he feels better after not having to worry for anything school, hero, villain, or crime related for a bit.]]

** Saejima senses that there's a rabid dog locked into Izuku when Izuku is only a seven or eight years old; well before he actually gets the title.

* EmbarrassingOldPhoto: One of Izuku's ideas for making Katsuki fight him is to ask Mitsuki fot Katsuki's old baby pictures and post them all over the school. Fortunately for Katsuki he never gets to go through with his plan.
* EnemyScan: Majima somehow can make his vision go black and white except for the people he's scanning and detect weapons. It's unclear if this is AuraVision, a Quirk (he says he's quirkless), a Heat thing, his eyesight being weird or just how he visualizes things. He also teaches Izuku how to detect weapons.

* EveryoneHasStandards: Izuku isn't angry that one of the clients of Sky Finance wanted the funds to gamble - it's Kamurocho, it's the capital of sex, money, and gambling. No, the reason he's pissed at the guy is because he lied about wanting the money for his business and is now spending it on stuff that have nothing to do with said business, all while having no intention to return it.
* EveryoneIsATomato: Izuku thought that his family was normal, and that his uncle is just eccentric. Then [[spoiler:the Akatani arc]] happens and he finds out that his entire family and most of their family friends are deeply involved in the yakuza.

* FantasticAbleism: Being Quirkless is viewed as a disability in the eyes of the wider public, even though public use of Quirks if prohibited, making the point moot.

** [[spoiler:Musashi Midoriya]] was yet another kid running away from a poor and abusive home and doing small time theft before becoming an assassin and Yakuza Patriarch with his own RedBaron title.

* GoldfishPoopGang: Chinpoko-chan, Oshiri-chan, and Kogan-chan - aka the trio that Izuku keeps beating up all the time. By the way, those aren't their normal names, they mean penis, ass and testicles.

** The fic's title translates to "Laid by Demons" of something along these lines.
** InUniverse everyone speaks Japanese full-time so this only applies on a meta level, but several terms and many insults go untranslated. Especially Izuku's more vulgar nicknames for people. Sometimes translations are provided in the chapter notes.

* GroinAttack: The first time Izuku "spars" with Kiryu (read:Izuku tries to land a hit and Kiryu dodges), he manages to tackle the man on his groin. Kiryu spends the next minute regretting underestimating the kid trained by [[ConfusionFu Majima]].

** As per canon, Majima who lost his left eye ages ago.

** A more plot critical example is when [[spoiler:he and Hisashi use JSL to quickly make up a lie about Izuku having a quirk to sell to the police.]]

* IconicOutfit: Izuku has his favourite custom-made jacket gifted by Majima; it's a stajun (a baseball jacket) made of a special quirk-enhanced fabric that makes the outfit grow as Izuku does, it's in the same green as his hair, and in the back it's the Hannya part of Majima's irezumi with the phrase "Bring on the fights!" around it in red letters. Izuku wears it through the entirety of each autumn and winter.

* ImmediateSelfContradiction: An example lampshaded by Izuku. After the first battle simlation, All Might scolds Izuku for using excessive force and almost killing Katsuki during training. Izuku interrupts him mid-speech and points out that All Might is sending mixed messages, as he wants to give Izuku One For All (which is a SuperStrength quirk) while simultaneously saying that he doesn't trust Izuku to control his ''current'' power level.

* InSpiteOfANail: When Izuku meets All Might in this fic, instead of just asking him if "I can be a hero like you", he specifies that he wants to be the kind of hero who saves others with a fearless smile, who makes everyone feel safe just by being there, and who can be a symbol of peace. However, even though Izuku removes the physical ability factor from the question, All Might still tells him no because his own so-called fearless smile is a lie meant to soothe the masses, and that he cannot in good consciousness tell Izuku to fight in the front lines when he himself almost got killed in a fight. So the remainder of the conversation goes basically like canon.

* InsanityImmunity: Izuku explains that making someone sense KillingIntent with Heat is half-dependent on the victim's mental state and their ability to perceive social cues. So if the victim is not in a right state of mind or has some kind of mental disorder that makes them incapable of reading the room, then this technique is nowhere near as effective.

* KidsAreCruel: Namedropped. Izuku thinks that children are cruel not because of [[ChildrenAreInnocent any actual malice]] but because nobody taught them to be kind yet. So they lash out to anything they're completely unfamiliar with, which in this case is Izuku who is abnormal in that he doesn't have a quirk. Not that these thoughts protect him from the childhood trauma.

* KnightOfCerebus: The early chapters of the fic is wholesome SliceOfLife with Majima training Izuku and Izuku meeting new people. And then [[spoiler:Mikumo Akatani]] shows up and everything goes to hell for Izuku.

* LawyerFriendlyCameo: All major real world websites have altered names in this fic. For example Netflix is called [=NexFlix=].

** Majima and everyone else in Izuku's family keeps him out of the loop regarding their Yakuza connections. [[spoiler:Up until Akatani shows up.]]

*** Akiyama gives Izuku an old watch of his after terminating his employment from Sky Finance.

* MistakenForMurderer: Izuku defeats Katsuki in the battle trials by using Maijma's Heat Action in which he snaps the opponent's neck to knock them out. Understandably, All Might and the rest of 1-A think that Izuku actually murdered Katsuki. It takes Izuku kicking Katsuki a few times until he groans from the pain to convice them he's not dead, and even afterwards the whole thing appears to be something of a TraumaButton to the rest of the class - at least Jirou. Aizawa tells Izuku that he needs to work on that hold because the words "hero" and "snapped neck" usually lead to memorials and law suits.

* MostDefinitelyNotAccompanyingUs: [[spoiler:Izuku is ''not'' happy not to be included in the plans for the Millennium Tower raid, but seeing what his mental state is, Kiryu challenges Izuku to land a hit on him ''once'' within a span of ten minutes to see if he's capable and determined enough. Eventually, Izuku suceeds - with Kiryu's own Tiger Drop - and gets to participate in the raid.]]

** Izuku's narration quotes the phrase "Not all men are born equal" both in the beginning of the fic and when [[spoiler:the police does absolutely nothing to deal with Majima's "murder" and Inko's kidnapping because they are too busy with villains instead of major crime syndicates.]]

** After Izuku and All Might's first meeting where All Might articulates his reasons why he cannot in good consciousness tell Izuku that he can be a hero, Izuku thinks to himself that in any other circumstances this would be a dream-crushing speech.

** [[spoiler:Akatani]] says that UA was his first choice in high-school and he fully believed he would get in, but he also applied for other places because he had to consider "what's realistic", as [[spoiler:he's quirkless]]. This is the advice that All Might gives to Izuku in the manga.

* OnceDoneNeverForgotten: Izuku is thought of as something of a MemeticPsychopath InUniverse amongst those affiliated with the UA because of the time he used Majima's neck snap Heat Action on Katsuki. Whenever anyone ponders or brings Izuku's character to doubt, the neck snap is the one thing they talk about. Even ''All Might'' questions Izuku's character over that takedown.
* OneDegreeOfSeparation: Musufatu and Kamurocho must be ''tiny'' because there is no other explanation for this. Through his connection to Majima, Izuku knows just about everyone Majima does. This includes Kiryu, Saejima, and Akiyama. Through his job with Akiyama, Izuku somehow gets involved with the Magatsume family and the Yagami Detective Agency, is given Ichiban's copy of ''Dragon Quest III'' as a bribe, gets in fights with the Keihin gang, and meets Midnight who is his future art history teacher. Oh, and Midnight herself? She went to school with [[spoiler:''Chisaki Kai and Mikumo Akatani'']] of all people. And she's dating the latter. Reminder that the latter [[spoiler:kidnapped Izuku's mom and used to work of Kurosawa, who really fucking hated Izuku's dad and grandfather.]] Oh, but there is more! The boyfriend? One omake implies (unclear if it's canon or not) that [[spoiler:he met Ichiban while in jail.]] Hold on, not done yet. The Majima Construction company built the batting cages with funding from the Yaoyorozu clan (yes, the same as Momo Yaoyorozu), who becomes Izuku's classmate years later, and they also built UA's Unforseen Simulation Joint. They won that contract in competition to the construction company Ochako's parents run, which means that Izuku's uncle is indirectly responsible for the poor financial state Izuku's classmate has years later. And all this is only a ''fragment'' of the connections in this fic.

* PatchworkKids: Majima finds it a bit disturbing what a perfect blend of his parents Izuku is. For the record Izuku looks exactly like his dad (down to the diamond shape of his freckles), but with his mom's coloring.

* PlasterCastDoodling: After Izuku walks in class with a broken arm in a plaster cast after USJ, he tells everyone that this is their chance to doodle on it.

* RealityIsUnrealistic: Discussed after Izuku's team's victory in the first battle exercise. As Yaoyorozu and a few others explain, media such as movies like to place the villain doing the classic EvilGloating trope in front of the weapon of mass destruction before the hero, while this isn't how this situations go in reality at all. However, Izuku in his plan took full advantage of this expectation set by the media to lure Katsuki and Ochako in his trap.

* RuleOfSymbolism: Discussed. Izuku thinks to himself that he never thought too deeply about what his uncle's Hannya tattoo means until [[spoiler:found out he's Yakuza]], but now he knows; it's the complexity of human emotion, and now for the first time Izuku is able to understand how it applies to Majima.

* SadisticChoice: [[spoiler:Kurosawa gives Majima two options. The first is combined with MortonsFork; Majima has to fight his sworn brother; if Majima wins, then he has to kill Saejima and then Kurosawa's men will kill him. In exchange everybody else gets to live for now. If Saejima wins, Kurosawa will kill Majima, Inko and Izuku and will pin their deaths on Saejima's pre-existing eighteen counts. Option two is Majima not fighting, but then Haruka will be killed in front of tens of thousands of people.]]

** Inverted with Majima and Hisashi's first meeting. Hisashi, who was a child at the time, gives Majima the riot act over dropping a cigarette butt on the pavement, and then goes on to lecture the older man on the importance of picking up and separating your trash for the sake of environmental persevation. Majima is so shook by the idea that the whole city's discarded cigarette butts and all other toxic shit end up in the water supply that he strongly adheres to those principles for the rest of his life. And even more so when Hisashi starts yelling about the shrinking rainforests. The poor man leaves the conversation thinking that the world is going to end because of littering.

* ShadowArchetype: [[spoiler:Mikumo Akatani is this to Izuku. Mikumo, other than quite literally being the beta version of Izuku, in this universe is also quirkless, he was also dependent on his mother whom he adored, had very few friends because of his quirklessness, and tried for the UA Entrance exam. Except that he ''failed'', and this pushed him to join the Yakuza and rise through the ranks. The main reason he pursues Izuku is to see if Izuku has what it takes, by pretending to kill Izuku's mom to force him in the same situation he once was in.]]

* SomedayThisWillComeInHandy: Hisashi taught Izuku JSL because he figured that at some point in his Hero career Izuku will have to talk with deaf people. It ''does'' come in handy, but not quite in the way either of them expected; [[spoiler:Izuku uses sign language to tell Hisashi to lie to the police about Izuku having a quirk [[HidingBehindTheLanguageBarrier without the Chief catching on to the conversation]].]]

** Scrapper Style is a style inspired mostly by Majima and Kiryu which focuses on unarmed combat against multiple opponents and allows for the brief use of improvised weapons. The Heat glows blue with green accents when he uses it and it's Izuku's most frquently used style.
** Armsmaster Style is entirely inspired by Taiga, Tetsuo and Death Arms, and is entirely focused on armed combat with a generous use of {{Improvised Weapon}}s. Izuku's Heat glows yellow when he uses it.
* StartOfDarkness: [[spoiler:Mikumo was already gloomy and miserable in middle school with the grand total of three friends (one of which who treated him like shit), so when he failed to enter UA, his mother died, and those friends vanished from his life, ''that'' was the breaking point.]]

* SuccessfulSiblingSyndrome: A cousin variant. One of Akiyama's clients, who has a side quest devoted to her, is Rio Suzuki, the younger cousin of Yuki of Four Shine fame. Yuki [[OlderThanTheyLook looks twenty when she's fifty]] and has a consistently extremely successful career in the host industry ever since she entered the workforce. Rio's parents just won't stop singing Yuki's praises to Rio. Meanwhile Rio is in her thirties, single, has a very plain appearance and the only noteworthy thing about her is her bad credit which literally got her laughed out of a bank when she tried to get a loan to open a business. She laments that her parents keep asking her why she can't be as successful as her cousin and that even Nemuri's ex-con boyfriend has more to bring to the table than her.

* TechnicianVersusPerformer: Izuku realizes that the issue with Pop*Step's show is that while her singing is technically on point and her dancing looks professional, she doesn't put any real spirit in her performance, which leaves it bland.

* TrainingFromHell: Namedropped. Neither Majima nor any of his acquaintances have any idea what a "normal" training regime is like, so Izuku is treated to things such as Majima chasing him around the trash heap beach in full "mad dog" mode or Kiryu ''shooting him with rubber bullets'' to improve his reflexes. At many points Izuku questions the sanity of his various male rolemodels. Kiryu's justification for all this is that it's pressure that makes diamonds.

** For Izuku, it's being called "useless" or a "puppet", and generally feeling helpless. It stems from Katsuki's old "Deku" nickname (which translates to those things), but gets much, ''much'' worse after [[spoiler:Akatani kidnaps his mom and strings him along.]]

* TraumaticSuperpowerAwakening: Averted and exploited. In reality, trauma or high adrenaline scenarios cannot activate quirks because they simply don't work that way. [[spoiler:But Hisashi and Izuku take advantage of Hisashi's status as THE expert and the Police Chief's ignorance on the subject to fool him into thinking that's possible.]]
* TrollingCreator: InUniverse. It's strongly implied that the Geddit (read:Reddit) user "UA_Rat", who is known for giving not entirely accurate info about the current on-goings in UA, is Nezu posing as a random fan who deliberately gives fake info among the true bits to keep people's interest engaged without arousing suspicion.

* VerbalTic: Izuku is completely baffled by Chief Tsuragamae's habit to bark at the end of his sentences.
* VillainousFashionSense: A subversion since Izuku is not a villain, but everyone notices that Izuku dresses well... basically like a ''Yakuza'' character. Between his everyday wear being a stereotypical thug jacket with a demon that literally tells people to pick a fight with him, the golden chain that every yakuza recruit in town wears, and his hero costume being a HellbentForLeather suit with steel toe shoes, it's no wonder people are weary even after they get to know him. He even [[DelinquentHair slicks back his hair]] when in the suit.

--->[[spoiler:'''-ain, our top story is the Sapporo shooting incident early yesterday morning. Hokkaido Police have determined... The victim was a senior member of Kanto's organized crime syndicate, The Tojo Clan. He's been identified as Goro Majima. Given the victim's status as member of the largest quirkless crime syndicate in Kanto-''']]

* {{Workaholic}}: Mei is so focused on her work that Izuku has to physically carry her to the UA cafeteria and spoon feed her her lunch while she's working because she won't remove her hands from her "babies" on her own accord. [[spoiler:It takes a turn for the tragic when Izuku gets injured in the USJ, and Mei works herself to the bone because she thinks it's all her fault for not making good enough gadgets.]]

* CallForward: The flashback on how Majima met Hisashi has Hisashi lecturing the older man on the importance of picking up and separating your trash for the sake of environmental persevation. Majima is so shook by the idea that the whole city's discarded cigarette butts and all other toxic shit end up in the water supply that he strongly adheres to those principles for the rest of his life. And even more so when Hisashi starts yelling about the shrinking rainforests.
-->'''Majima:''' (thinking) ''This must be pretty important to him. And if half of what he's sayin' is true, it oughta be pretty important to me too. I'm too damn young for the world to end!''

** Inverted with Majima and Hisashi's first meeting, as Hisashi gives Majima the riot act over dropping a cigarette butt on the pavement because all the trash ends up in our water. By the time Hisashi is done Majima in convinced that the world is going to end by littering.

* BlazingInfernoHellfireSauce: The only possible explanation on why Kiryu's "specialty" curry makes people cry.

* SuccessfulSiblingSyndrome: A cousin variant. One of Akiyama's clients, who has a side quest devoted to her, is Rio Suzuki, the younger cousin of Yuki Suzuki. Yuki [[OlderThanTheyLook looks twenty when she's fifty]] and has a consistently extremely successful career in the host industry ever since she entered the workforce. Rio's parents just won't stop singing Yuki's praises to Rio. Meanwhile Rio is in her thirties, single, has a very plain appearance and the only noteworthy thing about her is her bad credit which literally got her laughed out of a bank when she tried to get a loan to open a business. She laments that her parents keep asking her why she can't be as successful as her cousin and that even Nemuri's ex-con boyfriend has more to bring to the table than her.

* UncertainDoom: [[spoiler:The last time Majima saw anyone from the Midoriya family not named Hisashi was when Sugawa and his clan declared that they would "take care" of its Patriarch Hyosuke Serizawa. It's unclear what exactly happened to them.]]

** [[spoiler:Musashi's father was an alcoholic gambler and his mother abandoned them both. Figuring that he was already coming from shit, [[ThenLetMeBeEvil he ought to be even shittier]], so [[TheRunaway he ran away from home]] at eleven, joined an underage gang, and by the age twelve he was running errands for the local Yakuza. And ten years later, that family orders Hisashi to murder his own father. Which he does. And it messed him up for life. And this was before he became a killer for the Omi and his wife [[DeathByChildbirth died in childbirth]].]] [[EvilParentsWantGoodKids No fucking wonder he doesn't want his son to follow on the same path.]]

* NamedByTheAdaptation: Yuki the legendary hostess gets the surname Suzuki here.

** [[spoiler:Akatani tells Izuku that the two of them are more similar than he thinks, because they're both quirkless people that wanted go be heroes.]]

* OddlyCommonRarity: Even though the global quirkless population is at 20% (which in numbers isn't all that small but still a minority), it's stated that most of Okinawa's population (aka at least 50%) is Quirkless. In particular, prior to going to Okinawa, the only Quirkless person Izuku knew other than himself was Majima. In the Morning Glory orphanage, ''everyone'' is Quirkless.
* OhAndXDies: Parodied in the chapter "Spoiler Alert: Katsuki Bakugo Fucking Dies". He doesn't actually die, Izuku just uses that hold Majima has that looks like he snapped someone's neck. But it sure ''looked'' like he died, to the absolute horror of the rest of 1-A.

* OriginalCharacter: Musashi Midoriya; Izuku's grandfather and [[spoiler:the Patriarch of the Midoriya Fmily, as well as Omi's God of War]]. While he's long since been a PosthumousCharacter by the start of the fic, his legacy still lingers over his descendants.

** Whenever the fic uses BossSubtitles or announcing a Heat Move, there is a line break, followed by the the name of the enemy/Heat Move in a bolded style (like '''Pokochin-Sama''' or '''[!]Heat Move: Essense of Blindside''') followed by a second line break before resuming to the regular narration. The prupose of this is to emulate ''Yakuza'''s visual style of encounters as much as possible.

* VillainousFashionSense: A subversion since Izuku is not a villain, but everyone notices that Izuku dresses well... basically like a ''Yakuza'' character. Between his everyday wear being a stereotypical thug jacket with a demon that literally tells people to pick a fight with him, the golden chain that every yakuza recruit in town wears, and his hero costume being a leather suit with steel toe shoes, it's no wonder people are weary even after they get to know him.

* ExpositoryHairstyleChange: [[spoiler:After the Akatani arc, Izuku can no longer bring himself to cut his hair and spends three years wearing it in a ponytail and barely taking care of it. This is to show that he is slightly depressed, and it is only after he's accepted in UA that he feels well enough to cut it again. Even then, he cuts it at chin length, longer than it was in canon, and he slicks it back when he's in his hero suit.]]