Well, clearly Sawyer and Kate are the main characters. Sawyer might bring a sense of mystery and a bit of a roguish charm to the story. He could be the one who is more street - savvy. Kate, being a determined and often headstrong character, would be constantly pushing forward in their journey. Their relationship, whether it's a friendship or something more, is central to the fanfic.
One possible interesting plot could be their encounters with various obstacles on the road, like bad weather or dangerous animals. They might have to work together to overcome these challenges, which could strengthen their bond.
I don't know for sure as I haven't read it. It could be the main characters from the original work it's based on, or it might introduce new characters that play significant roles in the story's end - of - the - road scenario.
Obviously, Sawyer is a main character. But there could also be his Pokemon as important characters. Depending on the story, other trainers he meets during his journey might also be main characters. For example, if it's a story about a big tournament, the opponents he faces could be main characters too.
Tom Sawyer is the titular character, of course. He is a mischievous and adventurous boy. Another important character is Huckleberry Finn, Tom's friend who is more of a free spirit. Becky Thatcher is also a key character, she is Tom's love interest in the story.
Obviously, Castle and Kate are the main characters. Castle is the one who has the belief that Kate is cheating.
The main characters are likely Castle and Kate. Castle is the one who believes Kate is alive, so he's a central figure in this fanfic. Kate, whether she's present or just the subject of Castle's belief, is also a main character as the story revolves around her being alive.
The main character in this fanfic is probably a trainer who is eager to master Pokémon training. Alongside them, there could be a group of friends who are also trainers at different levels of their own journeys. There might be a Pokémon that has a special bond with the main character, perhaps a Pokémon they've had since they were very young. And then there could be a mysterious character who appears from time to time, with knowledge about rare Pokémon or secret training techniques that help the main character on their road to mastery.
One aspect of such fanfiction could be the relationship dynamic between Kate and Sawyer changing. They may become more protective of each other and start planning for a future together off the island. Their pregnancy could also be a source of hope for other survivors, symbolizing new life in a desolate situation.
Huck Finn is also likely to be an important character as he is often associated with Tom Sawyer in Mark Twain's works. In the context of a detective novel, he may assist Tom in his investigations or be involved in some way in the mystery.
Tom Sawyer is the main character, of course. He's a naughty but clever boy.