For Ruby, seeing the Jojo fanfiction would be like opening a new world of possibilities. She might start thinking about how some of the Jojo concepts could be incorporated into RWBY. Weiss would be more reserved, but if the fanfiction had a really good plot structure and character development, she'd give it more respect. Blake would be intrigued by the different ways the Jojo characters interacted with each other, and might compare it to how the RWBY team bonds. Yang would be like the cheerleader of the group, loving all the explosive action and big personalities in the Jojo fanfiction. In conclusion, their reactions would vary from Ruby's eager acceptance to Weiss's more cautious approach.
A villain like Shigaraki would likely be interested in the power levels in the MCU fanfiction. He's always looking for ways to increase his own power, and seeing the various powerful artifacts and abilities in the MCU might give him some ideas. He could think about how he could use similar things in his own plans to take over the MHA world.
Ruby's worldview might expand to include more complex power systems like the stands in Jojo. She could start thinking about different ways to use her own powers. Weiss might become more open - minded about different types of stories and the importance of creativity. Blake could see new ways to approach the idea of identity, as Jojo characters often have unique identities tied to their stands. Yang might realize that there are different levels of intensity in battles and might strive to bring that into her own fights in RWBY.
She might be initially scared but quickly regain her composure. Uraraka is a brave character. She would likely start looking for ways to escape, using her zero - gravity quirk to her advantage, like floating up to vents or disabling the villains' weapons if she can.
Shigaraki would likely be disgusted if the fanfic made him seem weak or less of a threat. He'd probably scratch at his neck in irritation. Dabi would be dismissive. He'd think fanfics are just a waste of time and not worthy of his attention. Toga, though, might be intrigued. If the fanfic had a lot of blood and gore in it, or if it focused on her relationships in an interesting way, she could be really into it.
They might get angry if the fanfiction shows the heroes in a very positive light and the villains as weak or stupid. They have their pride and don't like to be made fun of or belittled, even in fan - made stories.
Izuku would probably be terrified at first. After all, he's been kidnapped by villains. But then, his hero - like determination would kick in. He might start looking for ways to escape or at least resist their plans.
For heroic - centric fanfictions, they would likely be disdainful. Since they oppose heroes, seeing stories that glorify heroes would annoy them. They might scoff at the idealized versions of heroes in those fanfictions.
Shigaraki would likely be dismissive. He's so focused on his own goals of destroying the hero society that he'd see fanfiction as a useless distraction. However, if there were elements in the Genshin Impact fanfic that could somehow be related to his own plans, like powerful artifacts or magic that could be used for destruction, he might take a second look.
In a horror - themed fanfic, villains like Adam Taurus could be intrigued. Horror often plays on fear and power dynamics, which are things he is familiar with. He might be interested in seeing how the fanfic writers use elements of horror to create a new and terrifying RWBY world, and he might even get some inspiration for his own actions from the scarier aspects of the fanfic.