Sorry, I have no idea about the author of this 'harry is teained by 3 trains fanfic'. It could be an amateur writer who just wanted to create a unique story with this odd concept. Maybe it's someone within a specific fan community, but without further research, we can't say.
I'm afraid I can't tell you who the author of this fanfic is. Fanfics are often created by a large number of people, and this one doesn't seem to be widely known enough for me to be aware of the author. It might be a relatively unknown piece, and the author could be someone just starting out in the world of fanfiction writing.
I don't know who the author of this fanfic is. There are so many fanfic writers out there, and without more information, it's impossible to determine.
I'm not sure specifically as I haven't read that particular fanfic. But it might be about a character named Harry who has some sort of experience related to three trains. It could be an adventure where the trains play a major role in training Harry, perhaps in a magical or extraordinary world.
The title 'cooler trains with west kai' fanfic gives no clue about the author. It could be someone new to fanfiction writing or a more experienced writer who is exploring a new idea. Maybe it was written by a group of friends as a collaborative project, but again, with just this title, there's no way to know for sure.
It could be Sirius Black. He has a lot of experience in the wizarding world and, despite being on the run, he could find a way to communicate with Harry secretly. He could teach Harry about dark magic defense, which would be very useful in the tournament.
For sure Harry is there. But there could be new characters introduced. Maybe a foreign wizard who has come to Hogwarts for the summer and joins Harry in his training. The Weasley family could also be involved. Mrs. Weasley might be sending care packages to Harry during his training. And Mr. Weasley could be sharing some of his knowledge about the Ministry of Magic's regulations regarding certain types of training that Harry is doing.
There could also be new characters introduced in the fanfic. Maybe a new mentor figure who guides Harry in his training. This character could have unique magical abilities and knowledge that they pass on to Harry. Another possibility is an antagonist who tries to disrupt Harry's training for some reason, adding conflict to the story.
I'm not sure specifically as it depends on the author of the fanfic. But it could include the classic Harry Potter characters like Harry, Hermione, and Ron. They might be on the train for some special reason related to their fight against Voldemort or some other new threat.
Harry is the central figure, but there might be some new characters introduced in the fanfic. For example, an old wizard who lives on the outskirts of Hogwarts and has some unique knowledge about magic that Harry discovers. This character could become a sort of mentor, even if from a distance, as Harry trains himself using the knowledge he imparts. Also, there could be antagonists like some students who are jealous of Harry's self - improvement and try to disrupt his training.
I don't know who the author of 'Harry the Assassin fanfic' is. There are so many fanfic writers out there, and without more specific information, it's difficult to determine the author.
I don't know who the author of 'harry the saber fanfic' is. It could be an amateur writer who just shared it on a fanfic website.
Sadly, I have no clue about the author of this fanfic. Fanfics are often created by individual fans anonymously or under pen - names, so it could be really difficult to find out who wrote 'harry is a god fanfic' without doing some serious searching on relevant fanfic platforms.