Since I'm not familiar with this specific 'Mirror Man Novel', it's impossible to say who the author is. It could be someone who is just starting out in the writing world and has created this unique concept of the mirror man. Or it could be an established author writing under a pseudonym for this particular work.
There's no way to know exactly without reading the 'the man in the mirror novel'. However, if it's about self - discovery as we guessed before, there could be a mentor figure. This person might guide the man in understanding what he sees in the mirror. And of course, there would be the man himself as the central character. There could also be an antagonist, perhaps someone who tries to stop the man from facing his true self that he discovers through the mirror.
There's not really a defined 'character' in the general sense. It could be anyone who looks in the mirror. So, it's more about the self as the main 'character' because it's about self - reflection.
As I don't know the exact'short story', the main character is likely to be the man who is related to the mirror. There may also be other characters like his family or friends who are mentioned in relation to his self - discovery process.
I don't know who the author of 'Mirror Mirror A Novel' is. There are so many novels out there, and without more information, it's difficult to determine the author.
Michael Jackson, of course. Since it's in the title, he is the main focus. The story is likely to revolve around him and his connection to the song 'Man in the Mirror'.
It's fairly common. Fans often look for more content related to their favorite shows. Since 'Attack on Titan' has a large and passionate fan base, there are a lot of fanfics available. 'Aot' fans might watch (read) these fanfics to explore different scenarios that the official story didn't cover. For example, they might want to see how a certain character would react in a different situation or what would happen if a major plot event had a different outcome.
There's no way to tell who the author of '7 minutes aot fanfic' is just from this title. It could be any fan of Attack on Titan with a creative idea and the desire to write a short story related to it. There are numerous fanfic platforms, and it could be someone on any of those platforms.
I'm not sure specifically as there could be many novels with this title. It might be about a man who has some sort of self - discovery or transformation when looking at his reflection in the mirror. Maybe he sees a different version of himself, either physically or metaphorically.