SO LETS TALK “WHOS THE TRAITOR”
I’ll just start this off by axing off a HUGE group of characters right off the bat: the traitor is not a teacher, has to be from class A and cannot be from any other class, and is not a “minor” member of class A, such as Mineta or Sero. I am assuming that those characters who have been somewhat involved in the main plotline of the story are those that have the potential to be the traitor. After cutting it down from that, I’ll just run through specific instances.
Of course it’s not Midoriya, or the story would make no sense; same with Bakugou due to having been kidnapped. I’m cutting out Iida, Todoroki, and Momo for their involvement in helping to rescue Bakugou in the AfO arc, and also because they all have a family history in heroics. Froppy I’m cutting out more because of the way the story is written makes her a really awkward fit as traitor. Denki is one of the theories I’ve seen floating around, but I think that from the most recent arc, there’s a little too much leaning away from Denki having the capacity for being a traitor.
Kirishima, although I definitely wouldn’t be too surprised if it did turn out to be him, still doesn’t fit the bill for me. My initial reason was that Kirishima obviously wants to save Bakugou from the villains during that particular arc - he initiates the entire thing. While even despite on that, I was open to the idea of Kirishima being the traitor, but thinking on it there are two other reasons I can’t sink my teeth in. The first is that Kirishima is just… so honest?? and also Bakugou’s kinda-probably best friend? If the villains really wanted Bakugou to join the villain side, Kirishima probably would have known, and also he could have easily spoken to Bakugou about STUFF and weeded out whether or not Bakugou was really villain material. He also strikes me as honest enough to bide his time with Bakugou and then when the time came, literally just saying ‘hey, Bakugou join me on the villains’ side.’
My second reason is crucial: Kirishima is just not AS close to Midoriya as pretty much every other main character. While I’m sure Midoriya would be upset if Kirishima was the traitor, it wouldn’t have the same effect as a lot of the other main characters in the series. The shock factor for Midoriya, appropriately, would be more like “oh no, how could you?” and I don’t think that’s what Horikoshi wants. Good traitor reveals are big, painful, and close to the heart. They’re someone who the main character trusts, and a lot of the time, a character who’s been there from the start.
So who is left?