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Act 2 assumes the reader has completed the first Act. Thus, all spoilers will be unmarked except for a most important one.


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  • Accidental Pervert: Ronri causes this to Hawks, who has intercepted her flying, by warping him to Mirko as she's changing into her costume.
  • Adaptational Early Appearance: The Hood Nomu is unleashed in Hosu, as part of Shigaraki's plan to keep weakening All Might. Along with him are six Near High Ends that were not seen in canon before the Meta Liberation War arc, the ones looking like a dog and a lamprey clearly identified.
  • Adaptational Jerkass: While Shinso is a much better person in the main story, alternate universes so far have invariably featured him as whiny, arrogant, entitled and putting no effort because he thinks his Quirk is enough. In What If #2, where Izuku stays Quirkless but manages to enter UA, his attitude is noted to edge into quirkism.
  • Adaptational Name Change:
    • Mina gets to use her original hero name "Alien Queen".
    • Hagakure now goes by "Prism" after Izuku explains to her that being invisible means she'd be actually blind.
    • Jirou goes by "Sound Wave" after Izuku suggests she not merely use the same name as her Quirk.
    • Iida decides to call himself "Jesko", like a sports car from Swedish manufacturer Koenigsegg.
    • Todoroki has decided to name himself "Yuki" (snow), further showing how much he intends to hold on to his vow to never use his fire side.
  • Adaptational Villainy:
    • While the HPSC were already sketchy, their actions in Act II make them even worse as they are shown to outright favor discrimination if it means upholding their ideal of society. Their president is portrayed as actively and outright hostile against whoever she perceives as an obstacle to that and can't be controlled, ordering Ai's doxxing and trying to find ways to discredit Izuku to the public, also because he doesn't want Eri with the HPSC. She's even given an unsubtle name, as it means "Evil Bitch". Further reveals push the HPSC into Government Conspiracy territory.
    • Stain's ideals are made even more extreme in this story, to the point they edge into quirkism: he judges some Quirks "villainous", and therefore inadequate for heroics. It's one of the reasons he cripples Mina. He also seemingly thinks that force should be used against any crime, as he considers Ochako's successful attempt at defusing a situation a sign of "compromised morals".
  • After Action Patch Up: Izuku wakes up in the medical area of UA after defeating Shigaraki's monster.
  • Always a Bigger Fish:
    • Powerful as Ronri is, in the immensity of the Multiverse there can always be someone or something that can give her a hard time or bypass her defenses, and that she knows herself to not mess with. Like her counterpart controlled by AFO, or the Entity of Deep Dive #3, or John Wick. In Deep Dive #7 she makes sure of quickly moving her target to another universe, so their demon cannot interfere. The notes of #8 say her attempt to challenge Saitama ended with her flying across a whole continent, and a snippet from #9 shows she once lost to Koro-sensei.
    • Deep Dive #13 shows Ronri once ran afoul of one of the entities controlling the foundations of reality, and was utterly powerless before them.
  • An Arm and a Leg:
    • In Ronri: Origins, Shigaraki loses the same arm twice (and a third time later on, according to a comment by the author), recovering it each time only thanks to All For One temporarily passing a regeneration Quirk.
    • Happens to the Shigaraki of the main story, when Stain and Hanako refuse his proposal to join forces. Ronri experiences a sensation of deja-vu.
    • Kirishima gets a forearm ripped out by Hanako, who has transformed into a stronger but feral form. Ronri offers to regenerate it but he declines.
  • Arson, Murder, and Lifesaving: The only reason Nedzu doesn't expel Bakugou on the spot after the attack on UA, as he deliberately fought against the villains when told not to, is because he cauterized Ai's arm after it was cut to prevent Shigaraki's Decay from killing her.
  • Asshole Victim:
    • The man killed by Ronri at the end of Rehabilitation #4 is the main story's timeline's version of the Quirk Specialist who, in Ronri's home universe, told Dr. Garaki about her Quirk. Here, he's stopped before he can tell Garaki about Toga's Quirk Evolution.
    • Ronri's victim in Deep Dive #7 is the villain of The Witch's House; nothing else is needed to know (also to avoid spoilers for the game on this page).
    • Stain. After being defeated and restrained, he trash-talks Bakugo on his attitude, which provokes the young man to launch an explosion so powerful it kills Stain.
    • Namu Himoto, Aoi's father, in Deep Dive #8. Even if the Re-Destro of that universe is much better than the original, he kills Himoto the moment the man shows no regret for causing his daughter's suicide.
  • As You Know: In Chapter 40 Inko talks about Cthulhu Ryuu in a way that implies she's known him for a while, despite the character having been just introduced in the story and getting not even a mention beforehand.
  • Attack of the 50-Foot Whatever: Just as Ninetails and Basil have Ratigan in their hands, the villain calls Felicia, a cat with a Gigantification Quirk. From Ninetails' comments about her, apparently there are several of those in the UK.
  • The Atoner:
    • Kirishima after the Hosu arc. He decides to not have his lost arm regenerated, and to accept any decision Nedzu will take about his future.
    • The Vestige Bakugo in Ronri is from an universe where he accidentally killed Izuku during the Battle Trials and was wracked by guilt. Informed by a mysterious stranger that he would be killed by Ronri, he made sure Ronri took his Quirk before dying, so to eventually help from inside her Vestige World.
  • Back for the Dead: Death Arms was barely mentioned after being roasted by Izuku and suspended at the beginning of the story. When he finally reappears about 40 chapters later, he's killed.
  • Back from the Dead: Oboro Shirakumo, by all means. He died 15 years earlier and his corpse was transformed into Kurogiri afterwards. To restore him, both his mind and body had to be brought to a state before his death by Eri, so he now finds himself the same - if not even younger, as he's welcomed into Class 1-B - after missing out a decade and a half.
  • Bait-and-Switch: Both at the very end of Rehabilitation and in the closing notes of Chapter 65, characters experience strong fear towards an apparently terrifying, suffocating presence coming close to them, a figure wearing a suit and tie... only for the signature “Hello! Am I a dog? A bear? A mouse? Who cares!? I’m the Principal of U.A.!” to reveal it's Principal Nedzu.
  • Battle in the Center of the Mind: First Nejire who frees the Vestige of Ronri's copy of Overhaul, then Izuku and the other Vestiges of One For All who enter her Vestige World, attempt to merge Ronri's split personalities back. It's finally the Vestige of her home universe's Izuku, pushed out of apathy and resignation by a Vestige Bakugo from another universe, who calms and distracts her enough for Overhaul to do the merge.
  • Because You Were Nice To Him: It's implied the reason the Mina of Deep Dive #1 is spared by Ronri at the end, is because she was the only true and loyal friend of Izuku among 1-A, to the point of openly rebelling against Aizawa and deciding to leave UA.
  • Benevolent Conspiracy: The MLA in the universe of Deep Dive #8 strive to uphold the original ideals of Destro, including respect of Mutants and Quirkless, and dismantle the tyranny of the HPSC; Curious exposes UA's negligence by interviewing some students of 1-A. They aren't however without some dark spots, as they have some extremists with quirk-supremacist ideals within, Namu Himoto among them (reason for why Aoi, his daughter, took her own life even in this universe).
  • Beware the Silly Ones: While Basil is treated as comic relief most of the time, and even a Butt-Monkey in a few situations, he knocks out Felicia, a cat the size of a van, with a simple pistol whip, showing he's not Britain's No. 2 Hero for nothing.
  • Big Damn Heroes:
    • Atsuhiro Sako, aka Mr Compress, finds himself among the chaos in Hosu and saves a kid from a collapse with the help of his Quirk. He then accepts the request of a Pro Hero to help, and his Quirk turns out instrumental in defeating most of the Nomu unleashed on the city.
    • As Bakugo launches the explosion that ultimately kills Stain, Ochako would also be caught in the blast but Hanako tackles and saves her just in time.
  • Bitch in Sheep's Clothing: Idol Haya Kichimori acts nice and friendly with younger colleague Hikari Hoshino, inviting her apartment to offer her a drink - spiked with Trigger that would disfigure her, as Haya is jealous of Hikari being a rising star and doesn't want to lose the spotlight.
  • Bittersweet Ending:
    • Deep Dive #1, despite Izuku's tragedy and Ronri's massacre. Both One For All and All For One are out of the picture, and with most prominent people in both the hero and villain factions dead there is no imbalance in favor of either; Japan has a chance to start anew and forge a better future.
    • Deep Dive #7. While Ronri can't undo the ending of The Witch's House, she at least denies victory to the villain.
  • Birds of a Feather: Kirishima interns at Mirko's agency under her sidekick - Kendo Rappa, who decides they will train by punching each other as much as they can. They are immediately on the same wavelenght.
  • Breaking the Fourth Wall: The description of the Multiverse in Deep Dive #13. The original My Hero Academia is a Core Universe, also directly connected to a Prototype Universe based on the initial concepts and designs, and fanfictions are represented as numerous Branch Universes.
  • Break the Haughty:
    • Even if, by Nedzu's own admission, the attempts to railroad Bakugo backfired and made him even worse, his disastrous fall from (any chance of) grace and into villainy is ultimately the result of his arrogance and recklessness.
    • Haya Kichimori tries to sabotage Hikari Hoshino using a drink spiked with Trigger. Unfortunately for her, Hikari's real last name is Ayumi - she's a nephew of Ninetails and trained as a Kunoichi under her idol front. By making Haya believe she swapped their glasses, only to reveal Haya's is a third glass, she leaves Haya scared shitless (she meets the gaze of the characteristic "demonic" eyes of the Ayumis) and sure to not pull any more moves on Hikari or anyone else.
    • Some of Ronri's misadventures can be considered this in the face of some of her more violent actions, especially Deep Dive #13.
    • For her bigotry that causes a very misguided attempt at helping Aoi by throwing defaming accusations at Izuku and Ochako, Shiozaki gets quite a beatdown from Ochako, two weeks of suspension from lessons and house arrest, and a hanging sword of risk of expulsion from UA if she doesn't learn from all of this.
  • Broken Pedestal: Hanako idolized Stain after he killed her father's murderer, to the point that in this timeline she left the people she cares for behind to join him. The moment she learns Stain's quirkist motivations to cripple Mina, and sees him trying to kill Ochako for the absurd reason of de-escalating a situation rather than subduing her opponent (which was Hanako herself), she turns against him.
  • Brought Down to Badass: At the Sports Festival, Izuku can't use One For All during his fight with Monoma because the latter has sneakily copied Erasure from Aizawa just before the match. However as Izuku is well trained outside the strength and abilities given by OFA, he still wins easily.
  • But for Me, It Was Tuesday: Stain treats his killing of Pro Hero Goop and crippling of her interning Hero Student Mina Ashido like a little detour as he and Hanako are returning to Hosu after the meeting with Shigaraki, while Hanako has temporarily split to get some food.
  • Butt-Monkey:
    • Monoma at the Sports Festival. His insufferable attitude causes Amura to target him during the Dodgeball, and Nana Mochizuki to curse him with hours of bad luck thanks to her Quirk. He still manages to reach the Tournament phase because he teamed up with Todoroki, only to suffer a quick and humiliating defeat with a single, non-powered punch from Izuku. Afterwards, his commentary is so annoying that Todoroki turns him into a human popsicle.
    • Monoma is this even in the universe of Deep Dive #6, where he's a SCP scientist. Noting how insufferable he is even there, Ronri showers him with a series of events (most of them redacted) she's lived through in the multiverse, so outragerous Monoma asks for that conversation to be removed from his mind afterwards.
  • The Cameo:
    • Lady Nagant appears in Side Stories #8, briefly encountered by a younger Ona, not long before her arrest. Their interaction, while brief, is eventually shown to have left a mark on Ona.
    • While Deep Dive #7 is centered on The Witch's House, it also features an appearance of Aya Drevis from Mad Father.
    • Taneo Tokuda, the anime original character from the first episode of Season 4, appears in Deep Dive #8 as one of the journalists at the press conference held by UA.
  • Canon Character All Along:
    • A mysterious third Quirkless student admitted into UA in the new school year beside Aoi and Ai, is eventually revealed to be Melissa Shield, now a transfer student in the second year of the Support Course.
    • Chapter 45 reveals that Ronri, previously presented as a new character, is actually an Eri from another universe.
  • Cat Girl: Din Yaramoto, Ninetails' Head Sidekick.
  • Characters Dropping Like Flies: Deep Dive #1 kills off a large part of the MHA cast.
  • Combination Attack: All Might uses his strength to pin down the Hood Nomu, Mirko rips out the monster's head with her Luna Tijeras attack, and launches the head at Endeavor who incinerates it. Then Endeavor cauterizes the neck of the still moving body as All Might keeps it pinned before it can regenerate, ending the monster once and for all with little damage for him and the other two Heroes.
  • Comically Missing the Point: Rappa shows up demanding to fight Izuku; the boy refuses as he's clearly injured with a broken arm. Rappa decides to break his own arm so the fight could be fair.
  • Cool and Unusual Punishment:
    • The Vestige of All Might in Ronri's copy of One For All is wracked by guilt for how his terrible choices (as shown in Ronri: Origins) basically created her, watching her many terrible deeds in horror. His attempt to plead with her in the Vestige World is met with being sealed in a crystal, leaving only his eyes free, no other choice than keep watching.
    • Ronri's target in Deep Dive #7, first tortured using Overhaul to reset them every time, then getting their consciousness transferred to a doll, forever to be part of Ronri's shelf in her home base.
  • Corrupt Politician: Not content with their moves in Act I, the Hero Public Safety Commission keeps being a thorn in the side of the main cast. As Ai beats Shoto (or rather, convinces him to forfeit the match) at the Sports Festival, the president of the Commission can't tolerate the idea of a Quirkless girl beating the gifted son of a Top Hero and has Ai's private information uploaded online, with the immediate consequence of her ending up in the infirmary as a stone is thrown at her at the Sports Festival. There are also hints the HPSC is behind some bigoted members of the press knowing about Quirkless students having been admitted to UA. As Hawks informs All Might that they are trying to find anything that could discredit Izuku, it looks like doxxing is an integral part of their modus operandi.
  • Creepy Good: Din, whose Hero name is Hel, has a Quirk that allows her to use her blood to control anything non-living - including corpses.
  • Cruel and Unusual Death: A lot in the last part of Deep Dive #1.
  • Cruel Twist Ending: For Chito in Deep Dive #10. She resolves for a quick death for her friend Yuuri and herself rather than die of hypothermia or starvation in their dying world but right after killing Yuuri she has Ronri appear before her and offering to bring her to another universe. Driven mad, Chito shoots at Ronri who brutally beats her in response, leaving her to die bleeding out and in complete despair.
  • Curb-Stomp Battle:
    • Ronri gives a vicious one to Detective Tsukauchi's police squadron by hunting and killing each one as if it were a game, sparing only Tsukauchi who gets mindwiped.
    • Deep Dive #1 has Ronri massacring most of the cast in another universe with next to no effort, using insane numbers and combinations of Quirks. She also kills all prisoners and guards of Tartarus, All For One, and the League of Villains except Toga.
    • Stain is no match for Kirishima when the boy uses his Hardening Quirk. Kirishima however finds himself on the receiving end immediately after, getting a quick and vicious beating from Hanako. He momentarily gains the upper hand by activating Unbreakable but Hanako then goes One-Winged Angel and utterly demolishes him.
  • Cute Mute: Little Ara Ayumi is unable to speak and is learning sign language.
  • Cuteness Proximity: Dark Shadow goes "awww" as soon as she and Tokoyami are introduced to Ara. The girls of 1-A do the same when Tokoyami sends a photo of himself with Ara in his arms, announcing it as a "Code Eri".
  • Dead Alternate Counterpart:
    • In Ronri's home universe, Ochako is killed by Shigaraki at USJ, explaining why Ronri is so attached to Izuku but doesn't care as much for Ochako as she is long dead by the time Ronri meets Izuku. In the same universe, All For One dies in Kamino, causing Dr. Garaki to implant the original copy of his Quirk in Ronri.
    • A darkly humorous example with Dabi in the universe of Deep Dive #8: he has the misfortune of introducing himself to Shigaraki just when the latter is angry for how some whistleblowing students discredited UA before he could. The other Todorokis will never be the wiser.
  • Death by Adaptation:
    • Death Arms, just reinstated after the Sludge Villain fiasco, stumbles into Hanako while she's having a psychotic episode - she doesn't even immediately realize killing him. And as Stain is there to see what happens, Death Arms may have died that night anyway.
    • Manual appears in a new version of the train scene of the Hosu arc - already dead, killed by the Hood Nomu.
    • After being defeated and restrained, Stain ends up killed by a furious Bakugo.
  • Death by Irony: Most of Class 1-A in Deep Dive #1 are killed by Ronri in ways related to their Quirks or even by turning them against themselves.
  • Destination Defenestration: Namu Himoto in the universe of Deep Dive #8, courtesy of Re-Destro.
  • Detrimental Determination: Bakugo's wish to prove himself as top hero material causes him to get in the way of Stain's capture just to try and claim a takedown only for himself, disrespecting any recommendation and order; it takes little for him to put his own life and several others' in danger. After his expulsion from UA and arrest, All For One channels Bakugo's drive and anger into wanting revenge on Izuku.
  • Didn't Think This Through: Almost a year after the public reveal of Izuku as All Might's successor, Izuku and Ochako discuss of how it wasn't ultimately a good idea. This becomes even more evident as another indirect consequence was that Natsuo Todoroki, fed up with Endeavor's even harsher treatment of Shoto following the announcement, lashed out at his father - and came out from that hospitalized and currently in a coma.
  • Disproportionate and Misplaced Retribution: Ronri's massacre in Deep Dive #1. The only ones directly responsible for Izuku being Driven to Suicide are Bakugo for his remorseless bullying, and Aizawa and All Might for locking him away after he learned about OFA while falsely accusing him of being a traitor. Despite this, Ronri massacres everyone even tangentially involved, as well as numerous Pro-Heroes who are only there to stop her. Mirio was completely in the dark about everything but Ronri kills him just for being the motivation for All Might's actions. The rest of Class 1-A are only guilty of shunning Izuku due to the toxic environment Aizawa has created, since daring to speak out like Mina does gets her imprisoned for several days and viciously abused, and is something they all immensely regret after he's Driven to Suicide, to the point Ochako is already considering to kill herself when Ronri arrives. Even worse is that according to the author's notes, Ronri intends to kill Mina too at first, only deciding against it after realizing she's been the only one to defend Izuku.
    • In Deep Dive #10 Ronri leaves Chito broken physically and mentally, unable to even die quickly and on her own terms, over a ruined dress. While it's true that Chito shoots her (leaving no physical damage due to Ronri's regeneration Quirk), it happens exactly because of Ronri as she causes Chito to snap, acting before getting a better understanding of the situation.
  • Do Not Adjust Your Set: The Clockwork Court once hijacked all major British airwaves to broadcast death threats directed at the Royal Family.
  • Downer Ending: Deep Dive #10 begins by showing an universe where an alternate, even sadder ending for Girls' Last Tour is happening, only for Ronri to appear and make it even worse (see Cruel Twist Ending).
  • The Dreaded:
  • Driven to Suicide: From Deep Dive #1:
    • After accidentally learning about One For All due to being in the wrong place at the wrong time, Izuku is locked away by Aizawa and All Might, the cover story being that he's suspected of being a traitor due to his notebooks on everyone. Even after being cleared of guilt by Nedzu and Tsukauchi however, the HPSC still keeps him locked up on All Might's orders due to knowing about OFA, even stripping Tsukauchi of his badge for protesting it. Unable to deal with it anymore, Izuku takes his own life in his cell.
    • After Izuku's suicide Ochako has a falling out with her parents, who had grown quite attached to him, due to her dismissiveness of him being arrested, followed by a public confrontation with Hanako; she contemplates hanging herself out of guilt. Just as she hesitates, thinking that even if Yumara never forgave her, her parents would eventually, Ronri steps in and goads her by preying on her insecurities and berating her, causing Ochako to hang herself, her lifeless body found by Momo shortly after.
  • Even Evil Has Standards:
    • A humorous example with All For One. Despite the existence of an Immortality Quirk, he refuses to take it because he's too much of a fan of its holder, Keanu Reeves.
    • Mild example with Shiozaki in Chapter 88. Yuyu, knowing - likely thanks to her stalking - of Shiozaki's house arrest and resentment towards Izuku, tries to enlist her in a scheme against Izuku. Even if it was just for the sake of not risking expulsion from UA, Shiozaki refuses to partake and Yuyu knocks her out.
  • Evil Is Petty:
    • Just like Capcom, Nintendo's Mario is all but forgotten in the era the story takes place, and simply because All For One disliked Chris Pratt's casting for the CGI movie.
    • While it’s debatable whether Ronri is truly an evil person, it’s mentioned that she stole Maria Adam’s Empathy Quirk out of spite after the latter called her out for not being able to feel emotions.
  • Expy: Basil, the No. 2 hero of Great Britain, and his nemesis Ratigan are closer to outright transplants as they are basically the same characters as The Great Mouse Detective, only human-sized and with Mutant Quirks. Ratigan has even Felicia the cat, here possessing a Quirk that makes her huge to keep with the proportions; she even swallows a goon whole like in the movie.
  • Facepalm: The Vestige of Hana Shimura, in front of Shigaraki's... interesting reactions to seeing Ai on TV. She wonders if the fight at UA hasn't left him with brain damage.
  • Family-Friendly Firearms: During the Sports Festival, Momo creates a riot shotgun loaded with bean bag pellets to help herself and Mei defend their position in the Capture The Flag. Midnight approves it on the condition of being given to Snipe afterwards (due to him having a special license to own and use guns).
  • Flashback Nightmare:
    • Aoi has one involving her abusive father while she's recovering in an infirmary at UA.
    • In The Stinger of Chapter 51, Ronri dreams about fighting a mysterious enemy capable of putting even her on the ropes. Deep Dive #2, published shortly after, reveals it was another version of her.
  • Forced Out of the Closet: Mineta rudely outs Kuro Yume as transgender, something Yume clearly wanted to keep secret, in front of 1-A and many other students. This stunt causes Mineta to be expelled from UA.
  • Foreshadowing:
    • While Yume is outed here, Act I already hinted at him being either transgender or transexual. He's a fan of Tiger of the Wild, Wild Pussycats, a canonically transexual Hero, and refused to change clothes and bathe in the presence of the other boys.
    • In Chapter 54, When Ronri is revealed to have a split personality, she talks about her "bad" side currently resting in the Vestige Realm. While it could be initially thought to rather be a generic space where Quirks reside, since Ronri has many thanks to All For One, Chapter 3 of Ronri: Origins confirms that she was passed One For All in her home universe.
  • For the Evulz: Mantis, one of UK's most dangerous villains, gleefully admits he had a pretty happy and safe upbringing, he just likes killing.
  • Freudian Excuse:
    • In Deep Dive #8, as he's being roasted by the press about his questionable and inconsistent teaching methods, Aizawa attempts to pull this card with Shirakumo's death and how it affected him. It however garners no sympathy as he gets accused of dumping his trauma on the innocent students.
    • Aizawa pulls the same motivation in What If #2, when called out about his attempt to expel Izuku. It takes him a severe reality check - meeting the students he's expelled in the past, who are unhappy to see him and far too happy to beat him - to understand his mistake.
  • Get A Hold Of Yourself Man: The Vestige Bakugo in Chapter 91 finds the Vestige of Ronri's universe's Izuku, who has given up on her and feels guilty for having passed her One For All. The variant of his friend shouts him of his apathy with an angry Rousing Speech.
  • Glory Hound: Bakugo has grown so angry and desperate to prove himself to the world that he's become this, as he actively impedes Ochako and Hawks from subduing Stain to try and claim the takedown for himself. It gets Stain angrier, and Bakugo and several other people at risk of being killed by Stain.
  • Gonk: The only fame British villain Redcap can claim, is being exceptionally ugly.
  • Good Old Fisticuffs: Izuku and Ochako end up as finalists at the Sports Festival Tournament. They decide to not use their Quirks and just make good use of their combat training. Izuku ultimately wins by getting her in a strong armlock.
  • Government Conspiracy: The HPSC has turned into this by the introduction of Pro Heroine Ninetails, who's moved to the UK because of the HPSC's interest in her daughter's powerful Quirk, also to avoid her clan being targeted to get to her; apparently the British Prime Minister has some bad history with the HPSC President and personally facilitated the resettling. From her grandfather, Ninetails also knows their "recruitment" program is quite extensive and serves to create loyal subjects, as they have long-term plans to eventually overtake the Japanese government as the country's ruling body, even if it's not clear whether they intend a coup by force, or becoming a Shadow Government. This also reframes their management of the Meta Liberation War in the original timeline: not just hubris but also an attempt to operate above the government and the military.
  • Gracefully Demoted: As he takes full responsibility for his actions in Hosu, Kirishima serenely accepts being demoted to General Education at UA (even if with a chance of eventually returning to the Hero Course).
  • Groin Attack:
    • Hawks gets one from Mirko (see Accidental Pervert).
    • Amura attempts one towards Monoma, who's being quite insufferable, during the dodgeball game at the Sports Festival. It still hurts as he's hit squarely in the nose. Later during the Capture The Flag, due to Nana Mochizuki's Quirk cursing him with bad luck, he gets a beanbag aimed at his head in the privates instead.
    • As Present Mic has resorted to wearing protectors after taking too many hits in the shins during the Sports Festival, Eri targets a different part of his body.
    • How a Quirkless Izuku manages to take Eri from Overhaul at the end of What If #2.
  • Harmless Villain:
    • Redcap is considered a D-lister even among fellow villains, and kept around just as the easy scapegoat. May not even be for the wrong reasons, as his carelessness leads Tokoyami and Eleanor to the first safehouse of the Clockwork Court.
    • Another British villain, Exmoor, is a panther man with an intelligence Quirk. Apparently cool and menacing, only to be revealed to be an animal with a very average intelligence Quirk, easily defeated by Din.
  • Heel–Face Door-Slam:
    • In Deep Dive #1, after Izuku is Driven to Suicide and Mina tears them a new one before leaving, the rest of Class 1-A begin to realize just how badly they screwed up, helped by Bakugo's remorseless dismissal of Izuku's death, and seem ready to change for the better. At that point, however, Ronri appears and proceeds to massacre them all.
    • By the end of Ronri: Origins, All Might finally realizes he was wrong about Ronri being controlled by All For One. Problem is, it's taken for him to die and become a Vestige of One For All, also killing Izuku in the process, to open his eyes.
  • Heroic Sacrifice: In Ronri's home universe, Ochako dies by pushing Izuku away as Shigaraki lunges towards him, ending up killed by Decay. She even tries to say "My body moved on its own" before disintegrating.
  • Heroic Second Wind: Despite his horrific injuries and heavy blood loss, Kirishima finds the last ounces of strength and determination to get up, attack a distracted Stain, and then throw him in the air to expose him to further attacks from Tensei and Ochako, all using his only remaining arm.
  • Hero Killer: Hanako kills Death Arms, with Stain as a witness. They team up afterwards.
  • Heteronormative Crusader: Shiozaki once again. She's the only 1-A student to not smile at Izuku's attempt to comfort Yume after his forced outing, and not cheer at the end of Ochako's speech at the Sports Festival. She involuntarily hears Aoi recalling her father's abuse, however she's still convinced her relationship with Izuku and Ochako is not healthy. She confides with Kamui Woods while interning with him; he advises her about the serious consequences one can face by throwing accusations with no proof. After Hanako is arrested and Shiozaki learns of her connection with Izuku and Ochako, she resolves to "save" Aoi (see her Break the Haughty entry).
  • History Repeats:
    • While Tensei Iida being crippled by Stain is prevented using Izuku's knowledge, UA students still end up involved with Stain as Mina is later crippled by him, causing Kirishima to go looking for Stain just like Tenya Iida did in the original timeline.
    • When Chaos in Hosu erupts, Tensei runs into Stain, who manages to paralyze him and would proceed to cripple him, even claiming it's what he's intended to do since the Sports Festival, if it wasn't for Kirishima intervening.
  • Home Base: Deep Dive #2 shows that Ronri has made an underground home for herself in an universe where Earth is reduced to a frozen wasteland after an apocalyptic event caused it to leave its orbit, away from the Sun.
  • Hope Spot:
    • While attempting to avenge Stain's crippling of Mina, Kirishima is seriously beaten by Hanako. Appearing to him as Crimson Riot, his conscience makes him understand his mistake; now fighting for justice rather than revenge, he keeps using his Quirk despite his injuries, ultimately manifesting Unbreakable for the first time. His victory against Hanako is however short-lived as the latter gets a metamorphosis that makes her feral and even stronger, beating Kirishima even more brutally and severing one of his arms.
    • When Eleanor manages to make Ara break out of her cage by herself, it looks like she and Tokoyami may manage to prevent the kidnapping by themselves but the intervention of Pretender and Mantis tips the situation back in favor of the villains.
  • Hypocrite:
    • Stain attacks Mina because he thinks she's too bubbly and bouncy for hero work, despite his idol All Might being one who brings a smile to people, and that her Acid Quirk doesn't belong to heroics, which is just Quirkism. Hanako's idolization of him goes away instantly when she learns that.
    • He also tries to kill Ochako because he sees her getting friendly with a villain as a sign of compromised morals, despite said villain being his own partner Hanako. All while convinced he's helping make a better society that All Might would approve, while in truth he only sows fear.
    • All Might in the universe of Deep Dive #1. Given his origins as a Quirkless person, his Quirkism is unjustifiable.
  • I Can't Feel My Legs!: Said almost verbatim at the end of Chapter 56, as Stain has severed Mina's spine and left her paralyzed from the waist down.
  • I Didn't Mean to Kill Him: Bakugo's reaction after he launches a powerful explosion against Stain, killing him, only because he was being trash-talked by him; Stain was otherwise restrained and defenseless. While he's sincerely shocked by what he did (and Tsukauchi confirms he had no killing intent), the power of the blast could have also killed or severely injured Ochako if it wasn't for Hanako's intervention, putting Bakugo in an even worse position.
  • I'll Kill You!:
    • Yuyu vows to end Izuku with her own hands for "stealing" Nejire's Quirk.
    • What Kirishima intends to do to Stain for crippling Mina, and he almost succeeds. It takes a severe beating for Kirishima to snap out of that.
    • Yuyu later snaps and nearly succeeds at that with Eri.
  • Improperly Paranoid: In Ronri's home universe, the whole drama that ends with All Might and Izuku's deaths happens because All Might and Nighteye are firmly convinced that All For One's consciousness has taken Ronri over and has been manipulating Izuku and many others.
  • Insane Troll Logic: Yuyu's mind has drifted so much in her attempt to have someone to blame for Nejire's death, that she considers even Eri responsible, blaming a victim for having been saved.
  • Internal Reveal:
    • Izuku, under the guise of the same secret informant who passed intel about the Meta Liberation Army, arranges for All Might to pass a folder to Endeavor. This way Endeavor learns that Dabi is his lost son, Toya Todoroki.
    • The encounter with Ronri has All Might learn about the existence of the multiverse. After the Sports Festival he shares the new knowledge with Nedzu, Nighteye, Aizawa and Gran Torino. Kirishima, who later encounters Ronri as well, is asked to keep it a secret.
    • During the chaos in Hosu, Ochako finds Hanako and learns that she disappeared because she is now with Stain. Also, Hanako learns that Mina is the hero student crippled by Stain, and his reasons for doing so. Neither girl knows that Mina has already been healed by Ronri yet.
    • When Izuku and Aoi get accidentally lost in the Multiverse, they end up in the universe of Deep Dive #1 but years after those events, learning about them and how dangerous Ronri can get. Later, in the Corpse Party universe, Izuku and the Vestiges realize Ronri has a copy of One For All.
  • It Got Worse: Everything about the Hosu incident compared to the original timeline. In the days leading up to it, Mina is crippled by Stain (although Ronri eventually heals her). The Hood Nomu and six Near High Ends are deployed much earlier than in canon, causing more damage than originally, and Manual is killed. Tensei ends up involved anyway and is almost crippled by Stain. Kirishima almost exacts revenge in Mina's name on Stain, only to be savagely beaten and mutilated by a frenzied Hanako. Ochako manages to de-escalate the situation and calm Hanako down, only to discover Hanako's association with Stain and having to fight him. Bakugo attempts to take Stain down by himself, turns into a huge liability, and after Stain is defeated he kills him in a fit of rage; he's expelled from UA, arrested, and immediately broken out and recruited by All For One. Kirishima is demoted to General Education at UA (but with possibility of returning to the Hero Course eventually) and declines Ronri's offer to regenerate the arm he's lost. Also, Dr. Garaki resolves to create even more powerful Nomu, with Ninetails' daughter in England targeted as potential material. All of this while Izuku is in the United States; when he returns, he outright states how the crisis has played out even worse than the one in which he was directly involved.
  • It Runs in the Family:
    • In her brief appearance, Mina's mother is shown to have passed the interest for romance to her daughter.
    • Shoto's penchant for bizarre theories comes from Rei.
    • An example with an "adopted" child but the rare humorous moments regarding All For One paint the idea that Shigaraki's obsession with video games comes from AFO.
    • What If #2 reveals Hisashi is a Quirk Analyst, an interest inherited by Izuku with even more enthusiasm.
  • Jerkass Has a Point: He's a serial killer with standards for heroics so absurd they end up becoming even quirkist but Stain is not wrong in calling out Bakugo's attitude, especially the one he's gained in this timeline, as unfit for heroics. He's proven right in a twisted way, as Bakugo reacts so violently to Stain's words, he kills him.
  • Jerkass Realization: Shoto gains this gradually. First, by learning from Ai that he's not the only one to have suffered from abusive parents. Then, when Aoi reveals that she was born out of a Quirk Marriage and suffered heavy abuse for being considered a failed attempt, yet she doesn't act like a hostile jerk as he does. Finally, Ai makes him realize that to keep his vow to never use his fire side, he's not caring about who may suffer because of his decision, just like Endeavor with his goal to surpass All Might. He decides to forfeit his match at the Sports Festival and goes seeking Hound Dog for therapy afterwards.

    K-R 
  • Large Ham: Basil, Britain's No. 2 Hero, has got a strongtaste for theatrality, much to the annoyance of the more practical Ninetails.
  • Laser-Guided Amnesia:
    • After leaving Tsukauchi the sole survivor of his squad, Ronri uses a Memory Alteration Quirk on him. After learning of Ronri's existence some time later, Nighteye deduces her involvement.
    • Ronri meets Eri at the Sports Festival, gifts her a candy apple, and then makes her forget the encounter.
    • Ronri is on the receiving end of this in Deep Dive #3. She attempts to save an Alternate Self trapped by a supernatural entity, which however makes Ronri forget and sends her away. A couple hours later, Ronri finds herself in another universe with barely any memory of that.
  • Laser-Guided Karma: Shiozaki's stubborn bigotry causes her to not even listen to Kamui Woods' advice about not throwing accusations without proof; all she gains are a severe beatdown, two weeks of suspension and house arrest, and a looming threat of expulsion if she doesn't learn her lesson.
  • Leaning on the Fourth Wall: In the universe of Deep Dive #8, as some 1-A students decide to whistleblow about UA's methods, Ochako equates the lack of consequences Bakugo gets for his behavior to plot armor in an anime or manga.
  • Lighter and Softer: The Deep Dive spin-off becomes mostly lighter-hearted after its opening chapter, even showing happy and funny moments Ronri lived through her multiversal travels, including helping Izuku in the open in some universes. There are however exceptions as Chapters #3 and #10 are just as bleak as the first.
  • Loophole Abuse:
    • The Capture The Flag at the Sports Festival allows for any participant to hold only one flag in their hands at a time. Izuku carries four but as three are held with Blackwhip, he's allowed as he doesn't technically break any rule.
    • As there is no specific rule against that, Monoma copies Erasure from Aizawa before his match at the Tournament, convinced Izuku will be an easy opponent if depowered.
  • Marked For Death: In the United Kingdom, villains considered too dangerous are marked with a "Black Star", which means Heroes are authorized to use lethal force with them. One such villain, the psychotic Mantis, has gained the Star after escaping from prison several times while always leaving a trail of death behind.
  • Mood Whiplash:
    • Chapter 39 goes from a surreal conversation about the availability of the PlayStation 5 in the vestige world to the drama and heavy air of the scene in the infirmary to having it suddenly broken by Rappa's entrance - and finally gets even darker with the following scene.
    • Chapter 41 goes from Hanako visiting UA and enjoying her time there, to Hanako suffering a breakdown that ends with her killing Death Arms and meeting Stain.
    • Chapter 51 has Todoroki going from a heavy conversation about why he acted so badly until his recent epiphany, to him asking Izuku if Eri isn't his secret lovechild.
    • Within a single scene in Chapter 78, we go from an incredibly morbid training All For One is giving to Bakugo, using disposable Nomu with faces similar to Izuku's, to AFO himself not just channeling Palpatine but wanting a perfect cosplay of him, down to asking Garaki to get a Quirk to shoot lightning from the fingers, and build him a true lightsaber.
  • Mutual Kill:
    • At the climax of Ronri: Origins All Might, falling into his paranoia and dead-set about detaining Ronri in Tartarus, and Izuku, left without other options to protect her, fight and kill each other.
    • At the climax of the London arc Ninetails, injured and out of options, is ready to take a fatal stab from Mantis so she can deliver her own deadly attack to take down the psychotic villain once and for all. Averted at the last second, as Eleanor pulls her back just in time to avoid Mantis' attack, who's ultimately the only one to die.
  • My Death Is Just the Beginning: The Bakugo variant in Chapter 91 hails from an universe where he accidentally killed Izuku; Ronri came for him and even mortally wounded he was Defiant to the End, pushing her to take his Quirk before killing him. In truth, following the advice of a mysterious third party and as a way to atone, he provoked Ronri in his final moments to become a Vestige inside her and help at the right moment.
  • My Greatest Failure:
    • Nedzu in Deep Dive #1. In the one week he leaves on business, All Might and Aizawa manage to successfully imprison Izuku in Tartarus for learning about One For All with the cover story of him being a traitor, and nearly do the same to Mina when she dares stand up for him; by the time he can act to try and get Izuku released, it's too late as the boy kills himself. He can only bury his face in his paws after approving Mina's request to transfer to Shiketsu in the aftermath, ashamed of having failed her and Izuku so spectacularly, before resolving to make sure there is hell to pay for those responsible. His sentiment extends to the whole of 1-A after their horrible deaths.
    • In the main story, Nedzu has a similar reaction of apparent crying after he expels Bakugo following his arrest, realizing that the attempts to help him have involuntarily contributed in making him worse. Later, he and All Might feel the same when relating the latest events to Izuku.
  • Nebulous Criminal Conspiracy: The Clockwork Court, a mysterious S-level criminal organization from the UK. Despite having been around for decades, their exact size, scope and goal are unknown but they are considered as dangerous as the former MLA or Humarise. In Chapter 73, it's revealed their goal is steeped in ultranationalism as they wish to restore the old British Empire; shortly after, it's revealed that one of their leaders, Pretender, is a member of the Royal Family as he'd be the one to support them in case of success.
  • Neck Snap:
    • In Deep Dive #1 Ronri kills Tokoyami this way with the telekinetic abilities of her base Quirk, and Kirishima with a punch enhanced by her many strength Quirks.
    • In Rehabilitation #4 the Quirk specialist dies like this when Ronri twists his head a full 360 degrees. While asleep.
  • Nice Job Breaking It, Hero:
    • Ronri accuses All Might of helping usher in an era of Quirkism and discrimination because of his image as an all-powerful hero, inspiring the masses to consider strong and flashy Quirks to be of the utmost value. Those with undesirable or no Quirks are victims of discrimination and receive no sympathy from the world around them. After witnessing Ai being doxxed and then assaulted at the Sports Festival, All Might himself comes to agree with Ronri.
    • Bakugo's intervention in Hosu causes a favorable situation in the fight against Stain to be turned in the latter's favor once again, while also making Stain even angrier and more determined to fight as Bakugo's attitude especially disgusts him.
  • Noodle Incident:
    • Deep Dive #2 opens with a few characters transported by Ronri to her Home Base, talking about how they just witnessed an Evangelion Unit dropped on the Yakuza base, Ronri answering dismissively when asked how she even got it. Starting from this reveal that the story's multiverse is not limited to variations of My Hero Academia, we get several snippets of Ronri's travels. Among other things she was provoked by Tatsumaki into a fight that destroyed a few cities, summoned a Metal Gear Ray on top of an Evangelion, received an offer to kill John Wick (she declined), can summon Goku but then he'd pester her for a fight, can summon Homura Akemi but she'd get annoyed at that. Ronri also has a section of her Home Base dedicated to objects she collected in her travels; somewhere in the Multiverse, Cloud Strife wonders where his Buster Sword went.
    • At an unspecified point in the past, Ronri fought and barely managed to seal a version of her with All For One's consciousness.
    • According to All Might in the second chapter of Ronri: Origins, Izuku managed to quickly turn the Toga of that universe to the good side "by breaking her jaw and dumping all of his trauma onto her, then bonding with her over her own trauma".
    • In Chapter 57, we learn from a conversation between Nedzu and Aizawa that sometime between his capture in Chapter 38 and now, Kurogiri has been reverted by Eri back to Oboro Shirakumo.
    • During a visit to a zoo, Hanako got into a fistfight with a giraffe. Apparently, the giraffe deserved it.
    • Ninetails apparenlty confronted several cats with Gigantification Quirks in the UK, so much that when meeting Ratigan's giant cat Felicia, she is more annoyed than anything.
    • A British Hero called Lir is apparently a catalyst for bizarre accidents which have made him The Friend Nobody Likes among fellow Heroes.
  • No-Sell:
    • Stain finds his worst match in Kirishima whose hardened skin, also reinforced by his training with Rappa, is impenetrable by his blades. Subverted immediately after as Hanako's physical strength and razor-wire spider threads make short work of Kirishima; he momentarily turns the tables again by activating Unbreakable, freeing himself from the threads and punching through Hanako's exoskeleton, only for her to morph into an even stronger form.
    • British villains Pretender with his Magnetism Quirk, and Lady Death with her deadly poison, are very dangerous opponents. Their powers however are ineffective against Dark Shadow: Tokoyami may have a chance to push their backs on the wall - and does it literally with Lady Death - if the villains didn't have backup. On their second encounter, Dark Shadow easily defeats Lady Death; Pretender manages to restrain Dark Shadow but with great difficulty.
  • Oh, Crap!:
    • As if seeing a little girl like Ronri easily pinning the USJ Nomu down wasn't enough, a police officer with Tsukauchi has a Quirk that gives people auras of different colors depending on their threat level. He perceives her as purple, while the biggest threat he witnessed was red. This assessment is quickly proven true.
    • The reaction of basically everyone when at the Sports Festival, Kamakiri ends up stabbing Ochako in the side during their fight. While the injury turns out to be not serious, he's risked severing an artery and he's very apologetic about it afterwards.
    • Ninetails' reaction at the end of Chapter 77, at the news of Mantis' corpse being stolen. Extends to readers at the realization that, even if All For One and the Doctor failed at getting Ara, they will now bring back a dangerous villain like Mantis as a powerful Nomu.
  • O.O.C. Is Serious Business: Bakugo's intervention in Hosu, which only serves to prevent both Ochako and Hawks from subduing Stain, causes Hawks to lose his usual cool and swear angrily at Bakugo for his recklessness which, in fact, causes both to risk being killed by Stain shortly after.
  • Precision F-Strike: The second user of One For All, upon learning that Ronri possesses her own iteration of the Quirk.
  • Poisonous Person: Lady Death, a British villain, is extremely dangerous due to her Quirk generating a venom that can kill quickly on contact - unless you have a Quirk that allows to not touch her directly, such as Tokoyami's.
  • Puff of Logic: Deep Dive #4 shows that in the ''What If' universe, Dabi died when Hanako simply reminded everyone that there was no logic in how he kept using his flames at maximum output while being still alive; the moment the realization hit him, he was instantly incinerated.
  • Put on a Bus: After the Sports Festival Izuku receives an internship offer from Star and Stripe in the US, and Tokoyami from Ninetails in the UK; they both accept and temporarily leave Japan. This causes Izuku to be completely out of the new Hosu arc.
  • Pyromaniac: Felix Stowe is far too happy to use his Quirk to set things on fire, although it's heavily implied it's the cause of his arsonist tendencies to begin with, as he can never turn the flames off. In fact, the moment he's doused with so much water the flames are off, he's happy.
  • "The Reason You Suck" Speech:
    • Todoroki gives a vicious one to Momo by describing her as a failure as a Recommendation student and how she's wasting her time at the school with her lackluster abilities.
    • Shortly before the Sports Festival, it's Todoroki who takes one from Ai who, by angrily recounting her own past, reminds him he's not the only one who has suffered under abusive parents.
    • Ai and Todoroki meet again at the Tournament of the Sports Festival. She calls him out on his attitude once again, making him realize how he's become so dead-set on keeping his vow that he doesn't care if people suffer because of that. He forfeits the match and is next seen seeking Hound Dog.
    • Ochako dishes a quick and humbling defeat to Kirishima while coldly telling him that if he can't see the bad in Bakugo (especially the one that has turned out from the events of this timeline), he has no place in the Hero Course.
    • All Might gives one to Japanese society at large after Ai is doxxed and suffers an assault from the audience at the Sports Festival, recognizing his indirect role in making society worse (see Nice Job Breaking It, Hero entry) and telling that serious changes are needed before the country falls under the weight of its "pride and arrogance".
      • Izuku follows suit at the awards ceremony, refusing his first prize in protest; Ochako, Momo and Shoji follow him.
    • Ochako to Stain as, in his usual crazy and narrow standards, he's trying to kill her for getting friendly with a villain (Hanako, who is even his partner in crime currently) and de-escalating a situation rather than subduing. She tells him he's not doing something that would make All Might happy, only sowing fear.
    • After being defeated and restrained, Stain calls out Bakugo on how his attitude is completely inadequate for someone who aspires to be a great hero - and gets killed by Bakugo for it. Afterwards it's Hanako, with the last of her strength, who delivers a furious speech directed not just at Bakugo but at the ills of Hero Sociey as a whole, in a way very similar to Stain in the original timeline, including herself collapsing soon after.
    • The Mina of Deep Dive #1 gives one to 1-A before leaving UA, telling clearly that none of them deserves to be a hero for how they acted towards Izuku (especially Bakugo).
    • Izuku in Ronri: Origins to Shinso and Monoma, asking how they can dare calling 1-A arrogant when his classmates are just traumatized by how, merely a few days into their hero training, they had to fight for survival at USJ. Even more valid as in this universe they lost a classmate (Ochako) in the villain attack.
    • Shinso gets this twice in What If #2, once again for his attitude as he acts like he's deserving a place in the Hero Course at UA; he acts possibly even worse in that timeline as he's frustrated at seeing a Quirkless student like Izuku.
  • The Reveal:
    • In Rehabilitation #3 we learn that Dr. Kojima is quite knowledgeable about The Multiverse because his Hive Memory Quirk allows him to communicate with alternate selves by sharing memories, and even knows Ronri. According to the author, when visiting new universes Ronri does in fact seek iterations of Kojima for information.
    • Toga and Nejire are among the few people Ronri likes in the Multiverse besides Izuku, as she says herself when sparing them from her massacre of heroes and villains in the universe of Deep Dive #1.
    • From the same chapter: Izuku wasn't imprisoned in Tartarus because of his notebooks, as told by Ronri in Side Stories #6. It was merely an official reason to cover for locking him up after he accidentally learned about One For All (which he never held in that universe) but Ronri couldn't know that.
    • Chapter 45 ends with Ronri revealing her true name: she's the Eri of her original universe.
    • All For One has known about Hanako - including her killings at Drakengard Elementary - for a good half-decade, and says her Quirk is a Singularity-level that can make her potentially able to challenge One For All.
    • Deep Dive #2 reveals a multiversal counterpart of Ronri who's even more dangerous than her, as it's All For One who's got her body.
    • By the end of Ronri: Origins, we learn that Ronri is also the current holder of her universe's instance of One For All, which also explains why her Spatial Manipulation Quirk is so powerful and has become capable of moving between timelines.
  • Running Gag:
    • During the Sports Festival Tournament, Present Mic constantly calls for more spectacle and violence during the fights, with the reasoning there's always Recovery Girl to heal the participatns afterwards. The latter doesn't take it kindly and hits him in the shins every time; Eri fills for her when she's busy in the infirmary. And when he finally wises up and wears shin protections... Eri decides to change target.
    • A dark example in the universe of Ronri: Origins. Shigaraki ends up losing the same arm twice, recovering it only thanks to All For One lending him a regeneration Quirk. A "cut scene" by the author reveals that he got it cut again when the meeting with Stain went awry.

    S-Z 
  • Sanity Slippage:
    • After she attempts to attack an injured Izuku right after the villain invasion, Yuyu's mental state is such that Nedzu has to threaten her with committing her to a psych ward, should she not calm down. When she reappears many chapters later she's seen stalking Izuku, meaning she's far from out of her hole. Then comes Chapter 88...
    • Bakugo and Todoroki are not much better, as they seem moved little by the threats of expulsion; Todoroki even insults Momo, who just happens to pass by, about her abilities, further deepening her own insecurities. He eventually gets better, even voluntarily seeking Hound Dog for counseling. Bakugo, on the other hand...
    • Just as some 1-A students talk about the recent murder of a student of her school (which we know she committed), Hanako is triggered by Tetsutetsu activating his Quirk, as it reminds her of Mira Akotone. Later as she walks by night, even more memories cause her a full psychotic breakdown just as Death Arms happens to be there. And Stain is there, too.
    • All Might apologizing to Ronri, showing sincere sorrow for her history and his indirect role in the iniquities of society, is enough for her to suffer a massive mental breakdown as her past traumas have caused her to be convinced any All Might in the Multiverse could only be bad and intentioned to hurt her.
      • After that incident, it's revealed that Ronri's state of mind is such, she's developed a split personality - one more compassionate, one more violent - to not be crushed by the guilt over her own actions.
    • Ronri: Origins is basically the story of how she went insane. First experimentation in a laboratory even worse than in canon, ending up with All For One's Quirk forced into her. Then further tragedy with the death of Izuku and her being given One For All, causing her base Quirk to gain the ability to travel between universes. But it's witnessing the suffering of many alternate Izukus that ultimately breaks Ronri; her current personality is a volatile combination of her frail state of mind with the High Specs quirk.
  • Screw This, I'm Outta Here: The final chapter of Ronri: Origins has Mirio resigning from Nighteye’s agency and leaving without looking back, disgusted in Nighteye’s obsession with the past and with how he continued to paint both Izuku and Eri as villains after Izuku’s death. Bubble Girl and Centipeder follow suit the next day, leaving their resignation papers on Nighteye’s desk.
  • Sealed Evil in a Can: A version of Ronri taken over by All For One's consciousness exists and is nearly invincible, as she possesses both One For All and Rewind on top of Spatial Manipulation. Ronri barely managed to contain her thanks to a very specific Quirk and is deathly afraid she wouldn't be able to do it again in case she was freed.
  • Secret-Keeper:
    • After All Might relates his encounter with Ronri to Nedzu, Aizawa, Gran Torino and Nighteye, they decide to keep that a secret from Izuku for the time being. They can't know he's met her once already, and don't have the chance to tell him as she eventually comes out in the open.
    • Din, Hitomi and Eleanor, the closest friends of Ona Ayumi aka Ninetails, know of her origins and past as a member of a Japanese Shinobi clan. At the end of the London arc, she decides to trust Tokoyami with her secret too.
  • Self-Fulfilling Prophecy: Through his Quirk, the Nighteye of Ronri's home universe saw her killing Heroes and UA students, becoming even more convinced that All For One controlled her. In truth, he saw the massacre of Deep Dive #1, and it would happen because of him and All Might's obsession with detaining Ronri, ultimately causing her further tragedy and turning her into the character we know.
  • Self-Imposed Challenge: Having to confront each other in the final round of the Sports Festival, Izuku and Ochako decide to not use their respective quirks to fight on even grounds.
  • Ship Tease:
    • Hanako and Mina finally meet properly in Chapter 41, and their flirting is so blatant it may even be Love at First Sight.
    • Rei Todoroki understands that Ai has left quite an impression on Shoto, more than he admits or realizes himself. Shoto even asks Izuku about Ai's favourite food, and eventually asks her on a date - without even realizing he's doing that, a naivety Ai finds endearing. The ship ultimately sails in Chapter 81.
    • In Deep Dive #1 Mina teases Izuku about him and Nejire being quite close. There are also hints that Mina herself and Izuku could have grown quite closer than in canon, had tragedy not struck; after his death, Mina learns from Inko that Izuku talked of her as someone to rely on.
  • The Sociopath: Mantis is a villain who kills for the fun and thrill of it, with no trauma or tragedy in his past, he's just born that way; he even says that his first act of killing as a kid was drowning a bird, a typical sign of budding sociopathy. When he learns that Ninetails had a rough upbringing, he envies her.
  • Sole Survivor: By the end of Deep Dive #1, Mina is the only student of 1-A to not have died; technically all the class is dead as Mina is not even a part of them anymore, having moved from UA to Shiketsu. Also, discounting Nejire who rather tries to reason with Ronri and is sent away by her through a portal, Tamaki is the only survivor among the people trying to confront Ronri at UA. Finally, Toga is the only villain not killed by Ronri.
  • Spanner in the Works: Din Yaramoto's Quirk. The plan to kidnap Ara from Ninetails' agency while her mother is distracted by Felix Stowe is successful, however Annabelle attacks Din and takes some of her blood, unaware that her Quirk lets Din manipulate objects and bodies through it, so she ends up easily restrained.
  • Spared by the Adaptation: Beros is one of the few characters killed over the course of the World Heroes' Mission movie, choosing to fall to their death rather than be captured by the heroes note . Here, while it would happen offscreen, Beros ends up encountering Izuku and Star and Stripe while they were assaulting Humarise's American branch, with Chapter 75 confirming that Izuku managed to capture her alive.
  • Spiders Are Scary: Annabelle Mark, a small-time British villain, is so afraid of spiders she confesses after capture despite her fear of the Clockwork Court's retaliation, rather than have jars of spiders in her proximity. She is a mosquito mutant.
  • Surprisingly Realistic Outcome:
    • Deep Dive #8 is based on this trope, as many passages of the canon story are treated straight and realistically: UA's management of Bakugo and Mineta is called out as a spectacular example of negligence in the face of their problematic behaviors, Izukus' defense of Bakugo even in front of the latter's abusive attitude and actions is considered the result of years of past bullying that sank his self-esteem, and Aizawa is deemed completely unfit to teach as he projects his past trauma about Shirakumo on the students.
    • In What If #2, responsible adults discover the extent of Bakugo's problematic personality, favored by the quirkist policies of the Aldera school district, and the way he uses his quirk to assault others, when he's still a kid. They pull he and Izuku out of Aldera, make sure to cut contacts between the two kids, and take serious actions for the sake of Bakugo's future as he's ended up with a criminal record, sending him to therapy and anger management. When they reunite by the time of the canon events, their relationship is much healthier.
    • Also from What If #2, the entire 1-A revolts against Aizawa due to his biased judgement towards Izuku. As Aizawa stubbornly doesn't want to understand the error of his ways, Nedzu assigns him to go check on the students he's expelled in the past. Aizawa returns battered and bruised, and resigns from his teaching position.
  • Take That!:
    • Even if exaggerated negatively, the actions and personalities of some characters in Deep Dive #1 show criticism of how they were handled in canon, like Aizawa's questionable teaching methods and how little he intervened in regards to Bakugo and Mineta, Shinso counting too much on his Quirk without further training, and Kirishima (and most of the cast in general) being far too accepting and patient with Bakugo's early attitude, which he doesn't even grow out from in this one-shot.
    • Kirishima's attitude is called out in Chapter 49 as well.
    • Deep Dive #8 questions many narrative choices from the earlier arcs in canon (see the trope entry just above).
    • What If #2 features, once again, quite the roasts for Aizawa and Shinso. At least the former is made to realize his failings as a teacher and keeps being a good Hero, playing a pivotal role in taking down All For One.
  • "The Reason You Suck" Speech: Nejire gives one to Overhaul’s vestige in Chapter 90, calling him delusional for thinking his boss would be proud of him turning the Shie Hassaikai into a villain organization or torturing and experimenting on the man’s six year old granddaughter.
  • This Is Unforgivable!:
    • After learning from Mina herself, still in heavy shock, that Stain's reason to cripple her was partly due to Quirkism, All Might is determined to capture him.
    • For the same reasons Hanako ultimately turns against Stain.
  • This Means War!:
    • Just like in canon, Shoto declares war on Izuku for the upcoming Sports Festival but Izuku turns the tables on him, claiming that him leaving Ai Uzumaru to die out of pride means that all of Class 1-A will be at war against him. Ultimately it doesn't happen as it's Ai who brings Shoto down a peg.
    • Nedzu after Ai's online doxxing, which also causes her to be attacked at the Sports Festival. Tracing the source to the HPSC, he doesn't intend for them to get away with that.
  • Time Stands Still: The alternate Ronri - or rather, All For One in her body - is currently sealed in a crystal, thanks to a Stasis Quirk that has frozen her in time when Ronri touched her.
  • Too Dumb to Live: Shigaraki sees Ai, whom he didn't know was saved soon after he touched her with Decay, on TV as the Sports Festival is broadcasted... and concludes she must be a twin sister. Even when Ai's personal data is leaked online by the HPSC, Shigaraki just thinks the "twin" has the exact same name.
  • Training from Hell: Gran Torino, who's taken Bakugo as an intern, starts it immediately as he sees that Bakugo is far too eager to fight. Mirko barely gives Ochako time to enter her agency before going for a training fight. Rappa's training consists in punching each other a lot and then some but Kirishima is happy to take it.
  • Undesirable Prize: After winning the Sports Festival, Izuku publicly refuses and destroys the first prize medal due to what happened with Ai, in protest against society's Quirkism, especially as he's deduced that the rock that struck her has been thrown by a Pro Hero. Ochako, Momo and Shoji follow his example; Mirko, who should have handed the prizes, is pleased by the gesture and destroys the other medals.
  • Unfortunate Names:
    • The president of the Hero Public Safety Commission, unnamed in canon, is given the name Jaakuna Meinu. It means "evil bitch".
    • At the Sports Festival, even participants outside the Hero Course must take a nickname as their real names are not divulged for safety reasons. Hatsume goes by Zoomies but is unsatisfied because she rather wanted Babymaker, which Power Loader obviously vetoed.
  • Ungrateful Bastard: Kuro Yume is one of the students who saved Mineta from the Chainsaw Nomu during the villain invasion; he ended up with his uniform torn and Mineta noticed his underwear, deducing his gender identity. But rather than keep that for himself, Mineta casually outs Yume in front of a lot of other students a few days later.
  • Unwitting Instigator of Doom: When Namu Himoto shot that Trigger dart at the very beginning of the story, he certainly didn't imagine he would kickstart a chain reaction that ultimately erases a timeline from existence.
  • Villain: Exit, Stage Left: By the time Snipe brought Shouji and the injured Cthylla to safety, Rika Hyoto had recovered from Cthylla's toxic blood and escaped; she is currently at large.
  • Villain Takes an Interest:
    • Chapter 41 ends with Stain observing Hanako, who has just killed Death Arms, with curiosity. She is known to not have returned home by the following chapter and is later confirmed to have joined Stain.
    • As Bakugo has been barred from participating in the Sports Festival even before entering UA, Shigaraki is seen focusing on Todoroki.
    • All For One already knew about Hanako but his interest in her is renewed now that she has joined Stain.
  • Villain Team-Up: Chapter 43 reveals that Rika Hyoto is seeking to join Shigaraki again; she is in fact his henchwoman later. In the same chapter, Nine is contacting All For One directly, and similarly to canon he eventually undergoes a treatment by Garaki to be able to take a small number of Quirks.
  • Voice-Only Cameo:
    • In Deep Dive #8, the little girl who calls and outs Aizawa training Shinso rather than his class to the press, is clearly Ronri.
    • When Tokoyami calls Izuku in Chapter 69, Beros can be heard swearing as Izuku has apparently ran into her during his eventful internship in the US.
  • Wham Line: During Ronri's battle with All Might in Chapter 45, her bonnet, which she has always worn during her appearances, slips off, at which point we get a description of Ronri's upper head.
    Her hair, which Toshinori previously thought was cut short, cascaded down to her waist in long, black locks. And on the left side of her forehead. A single, small horn.
  • What Happened to the Mouse?: Some characters in Deep Dive #1 disappear abruptly from the story. For example Midnight and Present Mic are shown to be supportive and protective towards Izuku early on but nothing is known about them afterwards, while Nighteye, who should logically be a target of Ronri's killing spree, is last seen before it begins.
  • What the Hell, Hero?: Deep Dive #1 is full of such moments, given how unheroic many characters turn out to be.
  • While Rome Burns: Despite the overall failure of Tomura's invasion of UA, All For One considers a good result that All Might's true form has been revealed to the public, and decides to sit back for the moment while observing the ripples of the event throughout Japanese society.
  • Wolf Man and Pup: Kit, Ninetails' husband. Their daughter Ara has taken her canine features from him, and her Quirk is a dark energy projection that takes the shape of a wolf.
  • Would Hurt a Child:
    • British villain Pretender, with a Magnetism Quirk, doesn't hesitate to manipulate the iron in little Ara's body to subdue her. This makes Tokoyami furious. Garaki and All For One also intend to turn Ara into a Nomu, settling with Mantis' corpse only after the Londo operation fails.
    • Upon seeing Eri, Yuyu snaps (see Insane Troll Logic entry) and nearly strangles her.
  • Wounded Gazelle Gambit: In the semi-finals of the Sports Festival, Ochako fakes being hurt by Shoji in the same place where Kamakiri previously injured her; worried, Shoji lowers his defenses, allowing Ochako to use her Quirk and throw him out of the ring.
  • Wreathed in Flames: Felix Stowe, a British villain with a Quirk similar to Endeavor's, save for the important difference that it can't be turned off.
  • You Are Grounded!: All For One decides to imprison Shigaraki in a vault room for going behind his back to create his little raid game.
  • Your Days Are Numbered:
    • A non-lethal example. Recovery Girl brings up how it's only a matter of time before Toshinori loses his ability to use One For All and how it'll be better for him to retire as soon as possible.
    • It's revealed that ever since the graduation ceremony at Yomawari Junior High, Shinato knew Eri should have died over a year later.
  • You Will Be Spared: During Ronri's massacre in Deep Dive #1, she specifically makes sure to send Toga and Nejire to locations where they'll be kept out of the fight, due to both being two of the only few people she cares about in the multiverse outside of Izuku. When she later goes to visit Mina at Shiketsu, she merely glares at her before leaving, the author's notes making clear she had intended on killing her initially, but spared her upon realizing she was the only one who stood up for Izuku.

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