Wind breaker theories

The finished arc about the battle between Furin and Endo's group, in my opinion, turned out to be simply epic and a little dramatic. It was very scary for me to see how Sakura was beaten to such an extent that his beautiful and sweet face was swollen. And it was also creepy, from how much Endo became obsessed with my cat during their fight. Since he and Takiishi left and did not correct themselves, it is too early to cross them off the list of villains, what if they do something again? With the end of the battle, of course, there was silence, peaceful days of Sakura in the circle of classmates who encouraged him and everyone else, but as we all know, this is only the calm before the next storm. In general, I had an idea who could become a new problem in the life of Sakura and Furin, especially this idea for some reason is strengthened by the appearance of one of the strongest guys Shishitoren. It seems to me that he is not as good as he seemed, yes, I know it sounds so-so, because Togame, Choji and the others have taken the true path, but where is the guarantee that all of them have become good? Suddenly someone disagrees and is planning a cunning plan in this arc. This Wanijima is a very suspicious person for me, why did they show him now, and not after the battle of Furin and Shishitoren? Agree, this is very strange, besides, as I wrote just above, he may not be as good as Togame says, this is just my opinion, I can be wrong, do not worry about it. So, now a little about the last three chapters, in the orphanage where Umemiya and Kotoha grew up, a new girl appeared, in some ways outwardly a little similar to our Sakura, I would even say that she may be his younger sister, but this is complete nonsense! After all, those terrible parents of Sakura, or rather the mother, could not abandon their second child. In addition, we don't even know if Sakura's parents are alive, since his past is never revealed, probably the mangaka is saving this for the final arcs of the manga or won't tell us about it at all. Most likely, this girl looks like him only for the sake of similarity, since she has a little bit of Kotoha from the past, who was quite the rebel. I'm glad that this new arc has started, where we learn a little about the main teaser in Sakura's life, how she became who she is now, who led her on this path, although I probably already know who it is. In the last arc, I noticed one detail that probably no one thought about and maybe forgot, during the preparation for the battle with Furin's old students, several guys were patrolling the city, warning residents, and then someone in the form of a first-year Furin passed by them and praised the guys, but no one recognized him. Could this be some new character who preferred to stay in the shadows? Or the guy who once saved Umemiya, who pushed him to join Furin? Nooo, I'm completely wrong here, because that guy could have left the city after graduation. And he would have pretended to be a first-year to check how things were going with the new Furin.😅😆 Something like that, I shared a little of my thoughts about the new possible villain, about the girl and a little about the new arc. I hope you like my fan theory.