Some characters in bnha scary stories are unique to those stories. These new characters are often created to add to the spooky or suspenseful atmosphere. They might have really strange or terrifying quirks that we don't see in the main series. For instance, a character with a quirk that allows them to manipulate shadows into terrifying shapes that can attack people. So, in many ways, they are different from the characters in the main series.
Some powers might need to be toned down. For example, Todoroki's ice and fire powers could cause a lot of damage in the real world. He'd have to learn to control them more precisely so as not to cause destruction. And some powers might be more useful in unexpected ways. Uraraka's zero - gravity power could be used for things like helping with construction or moving heavy objects in a safe way.
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.
Not having read the 'kings maker novel', it's hard to name the precise main characters. But in a story with such a title, the 'kings maker' is bound to be a central figure. There may be a noble and just king who is being guided by the 'kings maker'. Additionally, there could be a group of powerful lords who are either allies or enemies of the 'kings maker', depending on how the story unfolds. There might also be a wise old mentor - type character who has some connection to the 'kings maker' and helps them understand their power and responsibilities.
Since I haven't read 'the star maker novel', it's difficult to say precisely. However, it's common in science - fiction novels like this to have a protagonist who is either on a quest for knowledge or trying to uncover the secrets of the Star Maker. There might also be a mentor - like figure who guides the main character in their journey. Another possible character could be an alien or some form of otherworldly being that has a connection to the Star Maker or the creation process.
I don't know the exact main characters as I'm not familiar with this specific novel. But they could be the weapon maker themselves, perhaps a young apprentice learning the trade, or an experienced master.
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.