Ash is almost surely a main character in this fanfic. In addition to him, there could be antagonists like Team Magma or Team Aqua leaders. Also, his traveling companions, who might be his friends or other trainers he meets along the way in Hoenn. His Pokémon, such as Pikachu, are also bound to be key characters as they accompany him on his adventures and battles.
I'm not sure specifically as I haven't read this particular fanfic. But generally, it might be about Ash's adventures in the Hoenn region with an emphasis on his aura abilities. It could involve his battles, encounters with different Pokémon, and his growth as a trainer in the context of Hoenn.
Ash is the central character. Alongside him, May is crucial as she brings her own story and development. Brock, with his medical and Pokémon - handling skills, is always there for support. Professor Birch also plays a role, being the local Pokémon expert who can offer guidance to Ash. Hoenn's Elite Four members are significant as they represent the ultimate challenges for Ash in his journey towards becoming a better trainer in the Hoenn region.
In many fanfics about Ash's Hoenn journey, his character development is often a key aspect. He might face new challenges that are different from the anime. For example, he could have more complex relationships with his Pokémon. The fanfic might also explore different storylines for his gym battles, like facing stronger opponents or having to use new strategies.
The special thing about Ash's Hoenn journey fanfic is that it allows for creativity. Writers can give Ash different personality traits or make him face situations that the official story didn't cover. For instance, he could be more confident or more hesitant in certain situations, which would change the whole dynamic of his journey.
I don't know as I haven't read it. It could be the chosen one, of course. And perhaps there are mentors or friends who help the chosen one along their journey.
May could be one of the main characters. She could join Ash on his journey and share her knowledge about Hoenn's Pokemon with him. Another could be Brock, still tagging along to offer his expertise in Pokemon care.
Some fanfictions focus on Ash's growth as a trainer in Hoenn. He might learn new battle strategies, for example, adapting to the different types of Pokémon prevalent in Hoenn. There could be plot points around his interactions with Hoenn - native Pokémon species that he hasn't encountered before. And his experiences with the different cultures and traditions in Hoenn can also be central to the story, as he tries to understand and respect them while on his journey.
One possible fanfic could be about Ash and May's adventure in Hoenn where they discover a hidden legend. They might encounter rare Pokémon and face challenges together, strengthening their bond as friends and perhaps hinting at a deeper relationship.
It could be that there is a young, impressionable character who looked up to Ash Aura. After the betrayal, this character is confused and starts to question his own beliefs. There might also be a powerful mage in the story who has the ability to see the truth behind Ash Aura's actions and is trying to prevent the chaos that the betrayal has caused.
His Pokemon are also main characters in a sense. They support Ash in his journey with his Aura abilities, like Pikachu who is always by his side in battles where Ash uses his Aura. And then there are other trainers and friends he meets along the way. They might not have Aura powers but they play important roles in Ash's growth and his Aura - related adventures, such as Brock and Misty who offer their own forms of support and advice.