#mha 415

[is-bakugou-alive-yet]

Deku looks stunning as always

[kickbutts-singsongs]

This is kind of a crack thought, but I’d love it if Horikoshi made DFO canon

but in the most anticlimactic way possible.

Like, we don’t see it during Bakugou’s fight, we don’t see it during Midoriya’s fight (and Shigaraki’s memories), but instead it’s after everything is over.

Everybody’s healing and getting better, and then Izuku and Katsuki, bored out of their minds, just decide to watch the footage of all the fights.

Squished together on a hospital bed, they’re watching Bakugou’s footage first (cuz Kacchan sugoi) and then Izuku’s like “hmmm hold on why does AFO look familiar?”

and then when they’re done, they watch All Might’s footage and Izuku’s eyes bug out of his head and goes “HOLY SHIT WAIT THATS MY DAD”

And then Katsuki just goes “huh. no wonder the fucker wasn’t around.”

and they just. move on.

[pikahlua]

MHA Chapter 415 spoilers translations

This week’s initial tentative super rough/literal translations under the cut.

tagline 1 突如現れた、ここに居ないハズの面々。それはーー とつじょあらわれた、ここにいないハズのめんめん。それはーー totsujo arawareta, koko ni inai HAZU no menmen. sore wa-- They suddenly appeared, all of these [people] that weren't supposed to be here. That's--

tagline 2 No.415　拒絶　堀越耕平 ナンバー415　きょぜつ　ほりこしこうへい NANBAA 415  kyozetsu  Horikoshi Kouhei No. 415 Rejection Kouhei Horikoshi

1 "記憶"の交錯…‼︎ "きおく"のこうさく…‼︎ "kioku" no kousaku...!! The intermingling of memories...!!

2 加速度的に進行していたAFO因子とOFAの感応がーーーー… かそくどてきにしんこうしていたにいさんとワン・フォー・オールのかんのうがーーーー… kasokudoteki ni shinkou shite ita niisan (kanji: OORU FOO WAN inshi) to WAN FOO OORU no kannou ga----... It's progressing at an accelerating rate, the responsiveness between brother (read as: the AFO factor) and One For All----...

3 何故 なぜ naze Why

4 おまえ達が見え���!!? おまえたちがみえる!!? omae-tachi ga mieru!!? can I see you all!!?

5 ２代目の攻撃で臨界点に達したんだ リーダーの譲渡でりんかいてんにたっしたんだ RIIDAA (kanji: 2daime) no jouto (kanji: kougeki) de rinkaiten ni tasshitanda By transferring (read as: attacking) Leader (read as: the Second), we reached the critical point. (Note: I don't think this is meant to be idiomatic. I think he means Through the transfer process, we were able to hit his weak point.)

1 OFAを奪う為に兄さんは心を欲した… ワン・フォー・オールをうばうためににいさんはこころをほっした… WAN FOO OORU wo ubau tame ni niisan wa kokoro wo hosshita... In order to steal One For All, my [older] brother wanted a heart...

2 だがどれ程無体な力を得ようと心はーー… だがどれほどむたいなちからをえようとそれはーー… daga dorehodo mutai na chikara wo eyou to sore (kanji: kokoro) wa--... but no matter how much intangible power he gains, that (read as: heart)--...

3 ここだったんだ koko dattanda was here.

4 悪意と憎しみに塗り固められた最強の敵… あくいとにくしみにぬりかためられたさいきょうのヴィラン… akui to nikushimi ni nuri katamerareta saikyou no VIRAN... The strongest villain coated with malice and hatred...

5 凶行を止めるには初めから きょうこうをとめるにははじめから kyoukou wo tomeru ni wa hajime kara Stopping atrocities starts from the beginning

6 僕らが紡がれた意味は ぼくらがつむがれたいみは bokura ga tsumugareta imi wa As for the meaning we spun together,

7 ここにーーー koko ni--- here [is where]--- (Note: It sounds like this final phrase is meant to be read like "It's in this place that the meaning we spun together will come to be." In other words, this is the place where they will see the meaning of their existence as One For All come to fruition.)

1 って感じねすごいわ二人とも ってかんじねすごいわふたりとも tte kanji ne sugoi wa futari-tomo "You're amazing, both of you!"

2 へし折って帰ろう！ へしおってかえろう！ heshiotte kaerou! "Let's smash [his pride] and go home!"

1 死柄木!!!! しがらき!!!! Shigaraki!!!! "Shigaraki!!!!"

1 緑谷あ みどりやあ Midoriyaa "Midoriyaa!"

1 OFAの"譲渡"が ワン・フォー・オールの"じょうと"が WAN FOO OORU no "jouto" ga "The transfer of One For All"

2 弾き返された⁉︎ はじきかえされた⁉︎ hajikikaesareta!? "was repelled!?"

3 ぐア… guA... "Gwa..."

4 ダメージはある‼︎ DAMEEJI wa aru!! There is damage!!

5 "拒絶"しやがった…‼︎俺たちを奪える程強い意志ならそれも可能ってことか… "きょぜつ"しやがった…‼︎おれたちをうばえるほどつよいいしならそれもかのうってことか… "kyozetsu" shiyagatta...!! ore-tachi wo ubaeru hodo tsuyoi ishi nara sore mo kanou tte koto ka... "He freaking rejected it...!! If his will is strong enough to steal us, then I guess that's also possible..."

6 ６代目だけが辛うじて"譲渡"された！ダメージはそのおかげさあ エ���だけがかろうじて"じょうと"された！ダメージはそのおかげさあ EN (kanji: 6daime) dake ga karoujite "jouto" sareta! DAMEEJI wa sono okage saa "Only En (read as: the Sixth) was barely transferred! That's why there's damage."

1 …つまり…完全には閉ざしきれていない……！ …つまり…かんぜんにはとざしきれていない……！ ...tsumari...kanzen ni wa tozashi kirete inai......! ...In other words...he's not completely closed off......!

2 増殖した指から"譲渡"できたらいいけど…今の二度の"譲渡"は指を壊して胸に当たった瞬間に発生した　つまり指からは渡せない　あれは爪や垢のようなものか ぞうしょくしたゆびから"じょうと"できたらいいけど…いまのにどの"じょうと"はゆびをこわしてむねにあたったしゅんかんにはっせいした　つまりゆびからはわたせない　あれはつめやあかのようなものか zoushoku shita yubi kara "jouto" dekitara ii kedo...ima no nido no "jouto" wa yubi wo kowashite mune ni atatta shunkan ni hassei shita tsumari yuba kara wa watasenai are wa tsume ya aka no you na mono ka It'd be nice if I could transfer it through his fingers that multiplied, but...the two current transfers occurred the moment I hit his chest and broke my fingers. In other words, I can't transfer through his fingers because they're things like fingernails or dirt?

3 ゴ GO "Ggh."

4 うう uu "uu"

5 ああ aa "aa"

6 近付いてる… ちかづいてる… chikadzuiteru... I'm getting closer...

7 何度だって試してやる なんどだってためしてやる nando datte tameshite yaru I'll keep trying no matter how many times.

1 衛星通信を介した超超長距離リモート操縦‼︎ えいせいつうしんをかいしたちょうちょうちょうきょりリモートそうじゅう‼︎ eisei tsuushin wo kaishita chou chou choukyori RIMOOTO soujuu!! "Super-super-long-distance remote control via satellite communication!!"

2 オーライ OORAI "All right."

3 オーライ OORAI "All right."

4 オーライ OORAI "All right."

5 さすが腐っても天下の雄英ね…‼︎ さすがくさってもてんかのゆうえいね…‼︎ sasuga kusattemo tenka no yuuei ne...!! "As expected of the-best-in-the-world UA, even if it's crumbling...!!"

1 あの子は緑谷くんのグローブ作成を取り次いでくれたのです あのベイビーはみどりやくんのグローブさくせいをとりついでくれたのです ano BEIBII (kanji: ko) wa Midoriya-kun no GUROOBU sakusei wo toritsuide kureta no desu "That baby took over the production of Midoriya-kun's gloves for me."

2 不時着となったので資材で強化しました ふ��ちゃくとなったのでしざいできょうかしました fujichaku to natta node shizai de kyouka shimashita "Since it was a crash landing, we're reinforcing it [UA] with materials."

3 手伝う！ てつだう！ tetsudau! "I'll help!"

4 怪我人を頼むよ！動けない人がいたら教えてくれ けがにんをたのむよ！うごけないひとがいたらおしえてくれ keganin wo tanomu yo! ugokenai hito ga itara oshiete kure "Take care of the injured! If anyone can't move, please let me know."

5 彼は私のクライアントなので今後より良いサービスを提供する為にも見る必要があります！ かれはわたしのクライアントなのでこんごよりいいサービスをていきょうするためにもみるひつようがあります！ kare wa watashi no KURAIANTO nanode kongo yori ii SAABISU wo teikyou suru tame ni mo miru hitsuyou ga arimasu! "He is my client, so in order to provide better service in the future, it's necessary I watch him!"

6 私の愛する人を逮捕に貶し入れてあろうことかより一層素敵にさせてくれちゃった男の子…！ わたしのあいするひとをたいほにおとしいれてあろうことかよりいっそうすてきにさせてくれちゃったおとこのこ…！ watashi no ai suru hito wo taiho ni otoshi irete arou koto ka yori issou suteki ni sasete kurechatta otoko no ko...! "He's the boy who made the person I love more amazing than did anyone who put him under arrest...!"

7 不時着 ふじちゃく fujichaku "A crash landing."

8 早く陸へ はやくりくへ hayaku riku e "Quickly, to shore!"

9 手を貸してくれ てをかしてくれ te wo kashite kure "Lend me a hand."

10 応援しなきゃあバチが当たるってものよ！ おうえんしなきゃあバチがあたるってものよ！ ouen shinakyaa BACHI ga ataru tte mono yo! "If I don't support him, I'll pay for it*!" (*Note: This phrase also means "What goes around, comes around," so "I'll pay for it" means basically "I'll regret it due to the karma.")

small text 映った…！ うつった…！ utsutta...! "It's displaying...!"

11 …⁉︎ なんだこりゃあ…⁉︎ ...!? nanda koryaa...!? "...!? What the hell is this...!?"

1 避難所 ひなんじょ hinanjo [At the] evacuation shelter

2 おい oi "Hey."

3 なんだあれ nanda are "What's that?"

4 手の…塊…⁉︎… ての…かたまり…⁉︎… te no...katamari...!? ... "A ball...of hands...!? ..."

5 アッ A "Ah!"

6 待チナサイ! まチナサイ! maCHINASAI! "Wait!"

7 エリチャン‼︎ ERI-CHAN!! "Eri-chan!!"

tagline 駆ける先はーー… かけるさきはーー… kakeru saki wa--... [Where] is she running to--...[?]

[villainsandvictimsalliance]

It looks like the rewind Theory might be coming true

There are many variations of that theory, but yes.

Honestly, it is badly needed in the story if what Horikoshi is aiming for is an ending where the kids and the villains survive.

Introducing a character that can undone damage is always insurance for the author. You have to be careful to not overuse it to the point it loses its impact. If no one ever dies and everyone keeps on resurrecting, the predictability becomes boring.

The good thing is that bnha doesn't overuse Eri. They don't use it to rewind the damage done to the characters when they lose an extremity, for example. It didn't work on Nighteye. They didn't try to use it on All Might—and if they did, I can't remember when it happened.

The point is that I liked that Horikoshi left Eri's quirk to the end of the manga. That way he could make the characters give their 100% without it meaning sure death. It scares the readers, like it should, it creates tension. Knowing that Eri's quirk might not work is another good decision. Even if she shows up after the big showdown, the public doesn't know who is going to survive.

Now, when I say there are many variations...

I'm against the version of it where the villains are turned into kids. Where is the fun of it, uh?

It erases the complexity of each character and all they fought for. What was the point of fighting so much if you're gonna erase what happened? If there's no consequences, no accountability? Any story should grow from the risks of the actions taken. We want to know there's something to be lost, that's where the adrenaline comes from. That's the entertaining part!

The version that completely heals their wounds is also kinda... bland. I'm a fan of bnha because the story doesn't solve most disabilities with magic.

If a pro-hero loses a leg or an eye, they'd have to learn to fight with the cards they were dealt with. Like I said before, those wounds tell a story of the risks they took. Aizawa cut his leg to survive and see another day with Eri and his students. Mirko lost most of her limbs giving her absolute all!!!!

It's the same for villains. It moves you, the way those villains would sacrifice themselves for their goals. Compress' lost arm tells the story of how they lost Magne. Giran lost his fingers when he refused to sell the League, so their absence is the evidence of his loyalty.

I want irreversibility. I want permanece. I want to see the growth that comes with accepting what we do in our lives and how we have to keep going.

My favorite version is the one that heals enough for the person to survive, but not much more. It is not going to take you to step one, it can't erase all you did and all that was done to you.

A second chance, but you have to make it from where you were left. No shortcuts, no easy way out. Either you commit to it or you're over.

I don't want to see Touya without his burns. That is boring! I don't want squeaky clean Touya, all perfect and smooth skinned and whatever. That is not him. He's the boy who burned in the flames of his passion, right or wrong. He's the boy who is supposed to be dead, but survived because he was a stubborn bastard.

The story can lessen them, of course. At this point Touya is more scrap put together by metal than anything else. He cannot possibly survive like that, so he needs to be healed enough to live. The burns can even lessen with time, fading as Touya heals, but I want the memory to last. I don't care if he forgives Enji, I want him to be forced to look at the burns every day knowing how they're there.

Another example?

Tomura's scars tell a story. You cannot resurrect his family, so don't go erasing the scar in his eye or in his lip. Don't go erasing the evidence of his struggle.

To be fair, Tomura has changed a lot since his first appearance. I remember him with yellow teeth, all skinny to the bone. It shows that no one cared for him. Well, maybe enough to keep him breathing, but there was no delicacy involved. It's funny to think how he got better and better the more time he spent far from AFO. That and the surgery he had to undergo...

Which is a wonderful terrible concept. It's about the cleansing, how AFO was preparing Tomura's body to be his. Body modifications to assert ownership, that's a horror favorite. The idea of being "cured" to the point you can't recognize your own body. You know what I mean.

I'm glad that when rewind was used on Mirio, it cost him something. He lost his quirk for a while and he had to make an effort to go back to who he was. I'd say that the nature of the story helped him bounce and that's a chance we didn't see his struggle a bit more.

Anyway, that's my opinion on the matter. I hope it'll be a variation I like and not something that's gonna leave me sweating cold every time I dare to remember it.

[greenhappyseed]

MHA 415 leak reactions

Once again, the leaker drama itself is hours of entertainment.

Short chapter and break next week. Get well Hori.

Chapter starts with Izuku prepared to force all of OFA on Tomura. The shared memories focus on USJ, an event where both Izuku and Tomura were present.

Izuku goes for the OFA transfer and Tomura REJECTS IT. Only En manages to get through and hit Tomura’s “psychic wound.” I think this means Izuku still has OFA and the remaining vestiges.

That’s when Izuku sees Tomura’s memory of the man in the suit taking him home. OH LAWD HE COMIN!!!!! (Will more memories of AFO allow him to puppet Tomura again?)

Hatsume and La Brava fail to pass the Bechdel test.

UA lands on the ground, meaning all our heroes are touching grass or lying down (All Might is on top of a building but can’t seem to move his legs.)

Cut to a shelter and Eri is off and running with Ectoplasm chasing her (Ectoplasm, who has clones and prosthetic legs).

What or who is Eri running towards? And where’s Aizawa, Mic, and Kurogiri???

[gradelstuff]

Y'all, Eri is only joining the battlefield because she saw Deku's new haircut and has to go fix it by using rewind on him. don't worry, trust

[sakubabypowa734]

🚨 BOKU NO HERO ACADEMIA CHAPTER 415 SPOILERS ALERT! 🚨

New leaks with great quality!

Deku prepares to transfer all the vestiges at once...

Deku punches hard on Tomura but the transfer isn't possible because Shigaraki's rejection is so strong. But, he still received some damage.

En is still managed to break through and get transferred.

This makes Deku realize that he can't give up and he just has to keep trying.

He sees in his blended memory, Tenko who is next to a man in suit. This was AFO who took little Tenko with him.

Just a picture of an amazing Deku vs Shigaraki and his big fingers.

Back to UA, the business course student is watching the fight. The chapter ends with Eri running with maybe an objective and Ectoplasm trying to stop her...

Break next week!

Take care Hori-sensei!

[jaded-ghoster]

horikoshi dropping fic idea after fic idea, like yes sir ✍️ ofa and afo can share memories ✍️

[maythebaebewithyou]

[sarah-dipitous]

I’m so excited to see original design Tomura in Horikoshi’s developed style, like Dabi and Toga from last week

[is-bakugou-alive-yet]

Shiggy becomes more monstrous as Izuku fights him off

[kickbutts-singsongs]

Guys

Tenko and Eri are parallels

TENKO AND ERI ARE PARALLELS

TENKO AND ERI ARE PARALLELSSSSSSS

Let’s compare.

Tenko:

Has a (potentially) destructive quirk

Was abused and treated harshly

Killed member(s) of their family with their quirk

Needed a hero (needed saving)

Red eyes

Eri:

Has a (potentially) destructive quirk

Was abused and treated harshly

Killed member(s) of their family with their quirk

Needed a hero (needed saving)

Red eyes

But for all their similarities, what separates them is the people that “saved” them; the first people that showed each of them kindness, did so for two very different reasons.

For Tenko, he was acknowledged and taken in by someone that had ulterior motives, someone that had plans for him and intended to mold him into something that he wasn’t. And this involved utilizing Tenko’s trauma instead of healing it.

The man that “saved” Tenko didn’t see a scared, lost child that needed protection; he saw the perfect model for his future successor; he saw a puppet.

But for Eri, she was brought in by Midoriya and Co., people that genuinely wanted the best for her. They slowly helped her work through her trauma, and helped her with her quirk—and not for their own gain, but to help her learn to safely control it.

The people that saved Eri saw a scared, imprisoned child that needed rescue, and so they rescued her.

If we put Eri in Tenko’s place, in AFO’s hands, I believe that her story would have gone the same as Tenko’s, with Eri being manipulated and turned into a weapon of mass destruction.

But I also believe, from the bottom of my heart, that if Tenko were somehow found by Midoriya—when no one else saw him, and all hope seemed lost—I truly believe that Tenko would’ve healed just as Eri has.

I used to dislike the Overhaul arc. I thought the tone of it didn’t match the rest of the manga (fighting destiny? changing fate? feels a bit more magical), and although I adored Eri, I just couldn’t see her as being much more than a plot device for rewinding things (and of course, the cute factor she brought into every scene was unmatched).

But upon seeing her in the latest chapter (415), this revelation hit me like a ton of bricks, and honestly, I can’t believe I didn’t see it sooner; she’s basically the blueprint for Midoriya’s rescue of Shigaraki.

[littleholmes]

It wasn’t until this panel that I realized Eri has been watching this whole thing.

She’s watched her whole new family fight so hard and I want to hug her. She’s watching her big brother Izuku fight this really scary fight after Aizawa and Mic disappeared in the fight and second big brother Mirio fought hard as well. One of the last fights like this she witnessed was her rescue and I can’t imagine how anxious she must be seeing everyone fight and seeing how stressed everyone is, and not knowing if things are going to be okay or if her new hero family of these UA students and teachers will be okay.

[villainsandvictimsalliance]

What do you think of afo giving shiggy decay

Oldest and favorite theory now to (very possibly) turn true in the manga. This was seriously one of my first theories when I joined the fandom!!!

Tumblr sucks at helping you find your own posts, meaning I have no way to link my old posts about it in this ask :( but anyway.

At first it was purely born from the frame of the shadow man with the hat delivering Tenko home and how strange it was that Tenko happened to awaken his quirk that day. There's also the fact that the man looked a lot like AFO, with the body structure, the suit and the face in shadows.

This is the panel that started it all:

I remember a lot of people went against it 'cause it was anticlimactic for them. They thought that if AFO gave Tenko decay, that event was taking something from Tomura as a character, making him less interesting.

For me, it made sense because there were too many factors that you couldn't explain otherwise. Some of them are exposed here. There are too many variables for it to be a coincidence. Now, if AFO gave Tenko decay or if he did something to activate it that day... That's yet to know.

But for example, look here. AFO had a room fully prepared for Tomura. He had shelves full of books, a bed, a chair and a desk... He even had toys!

* it looks like some of the action figures had arms or even the head missing. One of them is fully on the ground.

It wasn't long until Tomura had a PC installed too:

It's clear that AFO was expecting him. For what I know from the Vigilantes manga and bnha, AFO didn't treat every kidnapped kid like that. He had a hospital full of kids to turn into nomus after all. He wasn't that involved with every experiment.

Tomura was clearly different from the star. He knew who Tomura was, he expected the tragedy to happen, he expected the quirk too. AFO never reached for Tomura's hands. He acted like he had already seen the state the Shimuras' house was left in. He knew where to look for Tenko, like he was following him.

And the way he spoke... It was too premeditated:

He created that situation so he could play the role of Tenko's saviour. He needed Tenko to hate every hero, every citizen, he needed to feed his anger, his hurt. Or well, at least how's the theory goes.

AFO gave Tenko decay, waited for the result of an abused 5 years old reaching his limit and then he appeared like a knight in shining armor. He made sure to allow Tenko to walk around, he was also probably using his influence to interfere so a) the Shimuras deaths wouldn't become a scandal and b) no one would rescue Tenko before he could.

But going back to the "AFO gave Tenko decay" theory, I think the canon fact that supports that theory the most is that Tenko was already 5 years old. Here are the panels I'm referring to:

There's always the question if the Shimuras had a quirk. We know Nana had hers, but nothing is said about Kotaro or Nao or even Hana. We don't know if they were mostly a quirkless family or if Tenko would be the first one of them.

For the way Tenko recounted his day to Nao, we know that he was at the park playing with some friends. Here:

Between AFO picking Tenko up from the park and taking him home to his family, he must have done something. I don't know about the timeline... and if Giran could have already been associated with AFO... I just remembered that his quirk was the ability to muddy the memory of anyone up to five minutes prior or after he used it.

You see, Tenko never said anything to his family about the man that brought him home. We don't know what Tenko did when he "played the hero". We don't know what AFO told Nao. This is just theorizing, but giving someone a quirk by force doesn't hurt? From whom did AFO take decay if Tenko wasn't the original user?

Doc Garaki said it was a quirk never seen before...

I don't know. Since you asked me my opinion, I'll say that I'm still not very sure if AFO gave decay to Tenko or if it was Tenko's quirk from the start. It's not unheard of, since his case sounds a lot like Eri's, who developed a weirdly aggressive quirk on her own.

We're getting closer to being absolutely sure 'bout AFO's involvement with Tenko prior to the deaths of the Shimuras.

I just wonder what option fits better thematically.

[greenhappyseed]

Just realizing that MHA 415 seems to re-use panels from 412 for the evacuation center crowd shots. That means Eri & Ectoplasm are in the same location as Mitsuki, Masaru, and Inko.

415:

412:

The parents:

[77dekiru]

MHA 415: What Will Eri’s Role Will Be? (Theory)

Disclaimer: This is my own personal theory for what will be happening with Eri, and a decent portion of it will be speculation, but I will be including evidence that supports it as well. I’m unsure if I will be correct in the end, but I still think it’s worth putting out there!

Anyways. Since the cliffhanger from the latest chapter dropped, I have seen the majority of people speculate that Eri will be rewinding Tomura back into Tenko, but at this point, I genuinely don’t see that happening.

((Izuku can’t only save “Tenko” because Tenko and Tomura are the same person. No matter what Izuku, the Vestiges, and All For One think, they are not two separate people. If Izuku wants to save “that crying little boy” then Izuku must do so as Tomura still being Tomura.))

Instead, I think that Eri will have a quirk awakening.

(Quirk awakenings have been shown to happen during times of crisis, and while I don’t think that anything bad will happen to Eri, this is still a crisis situation for her.)

Instead of rewinding time with her quirk, I think that she will accelerate it instead.

Eri has a direct connection to the Quirk Singularity theory, (after Ujiko mentions her in his recording that he left AFO) and she is the character that has been chosen to represent this concept.

This was done for a reason.

The Quirk Singularity theory has been consistently brought up, over and over again throughout the series, and soon we will be reaching the climax of that plot point as the series comes to an end.

One For All has already passed the point of singularity, but we still haven’t seen the climax of that yet. I might just be forgetting something, but I don’t believe that All For One (quirk) has been said to have passed the point of singularity (yet).

It’s only been shown that Tomura’s body has been modified with counteracting the effects of Quirk Singularity in mind…

If Eri tries to use her quirk on Tomura to help Izuku, and she accidentally accelerates time instead, I think that Eri’s quirk will be what finally causes All For One to reach the point of Singularity, and will be what finally merges both One For All and All For One together.

((Not to mention, even if Eri doesn’t have a Quirk Awakening, All For One has already been consistently taking damage due to the transferring of the Vestiges.

Tomura can (probably) counteract the regular effects of her quirk, due to his body modifications being made with the effects of Quirk Singularity in mind.

Rewind will just be what weakens All For One enough for One For All to break through the current barrier that’s between both quirks.))

Anyways. A lot of this is speculation, but now that Eri will be playing an active role in this battle, this is the most likely scenario, in my opinion.