I think it helps that both of them share very similar ideologies, regarding the fascination of quirks, and that both of their quirks benefitted the other. Doc's Life Force allowing AFO to live even longer than he already could, and AFO carrying a huge supply of quirks for the Doc to study. I like that AFO does really respect and treat the Doctor as an equal, since he knows how smart and useful he is, and he's not gonna treat him badly just because he's someone serving him.
There was a theory I saw which stated that one of Shigaraki's hands, which we know are his family's, is actually Nana's too. And considering the rest of the family members in that vestige scene are each holding Tomoura in the same spots their hands used to be in the real world (like his dad's being the one on the face), and you have Nana suddenly there too, grabbing the back of his head, now I'm starting to believe that may definitively be true now.
Only All Might, Gran Torino, and Tsukuchi know that Shigaraki is Nana's grandson, and since they don't really have a reason to tell him (just like they say to All Might, so as not to plant a seed of doubt that he could possibly be reasoned with), I feel like Nana herself is gonna be the one to tell Midoryia about this at some point, leading to whatever reaction he might receive. My belief is this won't lead him to change his approach and "save Shigaraki" since he doesn't have the connection like All Might did, I think it'll mainly extend to just more hatred towards AFO and how he shaped the boy.
It feels to me like the first thing he would do is probably tell Bakugo, since he's right there and would probably want to know himself, and I also imagine if they do try to run after him somehow, Todoroki, Uraraka, and the others would follow along, since I don't see them being able to get away without the others knowing, and I don't see Midoryia sitting around waiting for Shigaraki to come to him (especially in a populated city). Shoto and Ochaco I'm safe in assuming will become major players in the fights, but I'm hoping more of the others join in to assist them too.
That does make alot of sense. The ones like John and Mocha are the Nomu used to replicate quirks using the original DNA (which had AFO's Goo Warp and Twice's Duplication), and then the full body Nomus are deceased people with their original quirks in tack, plus all the new quirks added into them. I do think that sounds and works much better than there just being a replication quirk.
It has to be one of two answers, either like you mentioned, Shigaraki has had AFO within him for a while now (at the very least since before the Hideout raid), and the Doctor's experiments just reawakened it, or the Doctor had the original quirk stored within his lab all this time and gave it to him during this process. I do think the former is probably the most likely, since the idea of Decay acting as a buffer, destroying his enemies before he even has the chance to attempt to take their powers, does make sense in hindsight. Even though I know how likely it probably will end up being, I personally would prefer if AFO wasn't responsible for Tomoura getting Decay, since I think it hits a bit harder as it all being a painful accident AFO took advantage of rather than as another piece of his master plan. Though I don't hate this theory as much as some others (because this one is the most plausible so I can at least cope with that) |