Uraraka would probably find it really interesting. She has a positive and curious nature. She'd be excited to see how the changes in backstories affected the relationships between the characters. And she might even share her thoughts about it with her friends in the MHA universe.
Some MHA characters might be really intrigued by Disney fanfiction. For example, Izuku Midoriya would probably be super excited. He loves stories and analyzing different characters' motives, just like he does with heroes. He'd be all about exploring the new worlds and character relationships in the Disney fanfics.
The MHA characters' reactions could vary widely. For instance, All Might might see the Naruto fanfiction as a great source of inspiration. He could admire the way the characters in Naruto strive for their goals, just like heroes in their own world. Todoroki might be a bit detached but still interested. He'd analyze how the power systems in Naruto compare to quirks in their world. Mineta would probably be more interested in any fan service - like elements if there were any, but that's not a very positive reaction. Overall, it really depends on each character's personality.
Deku is quite popular. His journey to become a great hero can be easily translated into a gaming context, like him leveling up his skills. Bakugo is also a favorite. His brash personality and powerful quirk make for exciting scenarios in fanfictions.
There's also 'MHA Meets MCU: Heroes United'. In this fanfiction, the heroes from both universes team up to fight a common enemy. It combines the unique quirks of MHA characters with the high - tech and superpowered world of the MCU in a very engaging way. The author does a great job of creating action - packed scenes and interesting character dynamics.
Spiderman has his super strength, agility, and the famous spider - sense. In comparison, MHA characters have a wide variety of quirks. For example, Todoroki has his ice and fire powers. Spiderman's agility might be on par with some of the more acrobatic MHA characters like Sero. But his spider - sense gives him an edge in combat that most MHA characters don't have. However, quirks like All Might's super strength can rival Spiderman's own strength.
Some MHA characters might be really intrigued. For example, Izuku would probably study the magic systems in Fairy Tail fanfiction with great enthusiasm, seeing it as a new form of 'quirks' in a way. He'd be taking notes and trying to understand how the characters use their magic powers for good.
Bakugo Katsuki, on the other hand, might be more dismissive at first. He'd think it's all just some made - up nonsense that has nothing to do with real hero work. But if he found a fanfiction that had an interesting battle scenario or a strong - willed character, he might grudgingly admit it had some merit. He'd probably scoff at any overly emotional or sappy parts though.
If the MHA characters were to react to a Mastermind fanfiction, some would be more accepting than others. Characters like Ochaco might find it really exciting. She's a fan of the heroes herself, so seeing different takes in fanfiction would be like getting a new perspective on the MHA world. However, characters like Shoto, who are more reserved, might be a bit hesitant. He might need some time to process what he's reading. But overall, it would be a very interesting scenario as it would show how the characters view different interpretations of their world.
One great crossover is 'Spiderman in the My Hero Academia World'. It's exciting as it shows Spiderman adjusting to the quirk - filled society of MHA. He has to deal with new villains and make friends with the students at UA. Another one could be where the MHA characters visit Spiderman's New York. It's interesting to see how they react to his world and its different challenges.
Kat - B320 is also a key character. She is a highly intelligent Spartan. Her backstory includes her being a tech - savvy member of Noble Team. She was involved in the development and maintenance of a lot of the military equipment used by the team. She has a no - nonsense attitude and her skills are crucial for the team's success, especially when it comes to dealing with advanced Covenant technology.