Hard to say. Maybe it's mentioned in the introduction or the endnotes. Or you could check if there are any discussions about it in the fanfic's reviews or on related forums.
I don't know. It could be a mystery left for the readers to figure out as they progress through the story. Sometimes, authors like to keep such details hidden until a crucial point in the plot.
The students of Class 1 - A are often involved. For instance, Midoriya might be portrayed as being unjustly treated by Aizawa, and the fanfic could focus on Midoriya's struggle against Aizawa's supposed unfairness. Bakugo could also be in the story, maybe being in conflict with Aizawa's disciplinary actions.
Not having more details about the 'rest in peace kid story', it's uncertain who the main players are. It could involve the child's caregivers, such as teachers if it happened in a school - related context. Maybe there were medical staff if the death was due to an illness. And of course, there could be other children who knew the kid and were affected by what happened.
Kid Rock is the primary character in the 'kid rock raw story'. But think about it, in his music career, there are bound to be other people involved. His collaborators in the studio, those he has toured with, and anyone who has been part of his creative process or his personal life that has influenced the overall story. For instance, if he has a long - time friend who has always been by his side during his ups and downs, that person could also be part of this 'raw story'.
The store manager would also be involved. They might have to assess the damage, deal with any angry customers who were disrupted by the incident, and decide what to do about the kid and their parents. And of course, there could be other shoppers in the store at the time who witnessed the whole thing.
The characters in the 'bnha big 3 fanfic' are centered around Mirio, Nejire, and Tamaki. However, depending on the plot of the fanfic, it could also involve villains. Imagine a scenario where the big 3 have to face a powerful villain who has a quirk that specifically targets their weaknesses. This would not only showcase the abilities of the big 3 but also introduce new and exciting elements to the fanfic.
Izuku Midoriya is often a popular choice. His original quirk 'One For All' can be really interesting when combined with gamer - like elements. Writers can explore how he levels it up, discovers new abilities, and overcomes challenges in a more game - inspired way.
Mustard is, of course, one of the main characters. Depending on the fanfic, other characters from the BnHA series like Deku or Bakugo might also be involved. They could be either in a confrontational relationship with Mustard or in a situation where they are trying to understand him better.
I'm sorry, but without more information, it's impossible to say who wrote 'bnha one of those fanfic'. There are so many fans writing 'bnha' fanfics all over the world.
In 'Karate Kid', for the love story elements, the key characters are Daniel, Ali, and Mr. Miyagi. Daniel is the protagonist, and his relationship with Ali is a love story on its own. Ali is an important part of Daniel's life in the movie as his love interest. And Mr. Miyagi is another important character in the love aspect. His relationship with Daniel is one of love, care, and mentorship. He helps Daniel grow not only in karate but also as a person, which is a form of love.
Most likely, the main students from Class 1 - A would be involved, such as Izuku Midoriya, Ochaco Uraraka, and Katsuki Bakugo. They are central to a lot of the events in the BNHA universe, so it's reasonable to assume they'd be at the after - party.