It could be a young trainer who prefers to journey alone. They might be the central character, facing Pokemon battles and exploring the world on their own.
Since I haven't read the 'alone on the water fanfic', I can't say for sure who the main characters are. But it could be a lone sailor, an adventurer, or someone who has been stranded on the water.
I'm not sure specifically as it's a fanfic. But it could be characters from the original source material that the fanfic is based on, who are now put in situations where they fight alone.
It could be a young and ambitious trainer. This trainer is often the one who drives the story forward, seeking out Fatalis for various reasons like proving their worth or to protect their region.
It's hard to say exactly who the main characters would be without reading the specific 'pokemon titan fanfic'. But it could be a young and brave trainer who is determined to face these titan Pokemon. Maybe there's also a wise old Pokemon professor who provides guidance on dealing with them.
Well, Landerous itself is likely to be one of the main characters. And probably the trainer who has a connection with Landerous.
It could be a powerful Pokemon like Mewtwo. Mewtwo has the strength and intelligence to potentially be a dominant force in such a fanfic.
There could be a young and ambitious trainer named Alex. He's on a quest to become the best Pokemon trainer in America.
It could also be a new character created specifically for the fanfic. A young girl who has a natural gift for music and can communicate with Pokemon through melodies. She might use her talent to solve problems in the Pokemon world, like helping Pokemon that have lost their way or are in distress because of some dark force that is disrupting the natural harmony of the Pokemon world.
It's hard to say exactly who the main characters are without reading it. But it could be a new trainer starting their journey and the cliff is an important part of their adventure.
Well, obviously Ariana is one of the main characters. She is likely to be the central focus of the story.