It's a very interesting and very plausible theory. It's possible that her careless and silly nature is just a mask to fool other characters. We've seen Kyouka's true personality several times, but we still don't know what crime she committed that led to her being exiled. Also, the fact that...
The capabilities of the Kyouka hammer are still unknown, and it may be an ability to repair things like Josuke stand ability, or an ability to destroy things. That is why she said that restoring Higana is may still possible, and the reason she did not use it is probably because it consumes a lot...
Izuko was truly fortunate that her first encounter with Kyouka occurred when she was in a weakened state; otherwise, the story would have been quite different, considering that Kyouka is the top number rabbit, and the fact that her number is censored and she remains a mystery suggests that she...
even in a weak state taisai is still very strong to fight against a class of graduates, thankfully the author did not nerf him after becoming part of the group.
The scene when the explanation about the world and the adventurer's reminds me of the overlord in carne village when the village chief explained about the world. 🤣