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.
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.
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.
It could be the classic villains from the original series like All For One. He might be interested in baby Deku's potential quirk. Another could be Shigaraki, who might see baby Deku as either a threat or an opportunity to disrupt the hero world in a new way.
There's a group of villains in the 'Villains Rising Light Novel'. One of the main ones is a woman named Lilith. She is cunning and uses her intelligence to outwit her enemies. Another is a hulking brute named Brutus who uses his physical strength to cause chaos. They all have different motives for their villainy which makes for an interesting dynamic.
I'm not sure specifically as I haven't read the exact novel. But usually, the main villains are those who oppose the protagonist the most. They are often the ones causing the most chaos and problems in the story world.
Salem is also a very popular villain in RWBY fanfiction. Given her status as the main overarching villain in the series, fanfic writers like to expand on her backstory, her motives, and her long - term plans. There could be fanfictions that focus on her interactions with other villains in a more detailed way.
In 'The Lord of the Rings', Frodo is a hero. He undertakes the dangerous journey to destroy the One Ring. Sauron is the main villain, with his desire for domination. Another example is in 'Harry Potter'. Harry is the hero, facing the evil Voldemort. Voldemort is a classic villain, with his pure - blood supremacy ideology and his numerous dark deeds.
😋I recommend the following novels to you:
"The Unparalleled Prince's Defiant Wife"
This was an Eastern fantasy romance novel. The main character was a top-notch assassin from the modern era. She transmigrated to the Southern Cloud Nation and became a good-for-nothing ugly girl. However, her strength was that of a genius all-elemental Summoner. She appeared as a black-bellied and evil person, so it was not difficult for her to be a villain. At the same time, there was also a useless prince from the Feng Prince residence who was pestering her endlessly. The entire plot was very subversive. I hope you like this fairy's recommendation. Muah ~😗