Misty and Brock could be important characters as well. They have been with Ash for a long time. They might be deeply affected by Ash's supposed death and be the ones leading the search to find out what really happened.
His Pokémon, like Pikachu, would surely be important characters. Pikachu might be the first to suspect that Ash is not really dead and start searching for him. Misty and Brock could also be main characters. They are Ash's long - time friends and would be deeply affected by his supposed death. They might be the ones to uncover the truth behind his faked death and help him in his plan, or they could be completely in the dark at first and then gradually figure things out.
In some versions of such fanfiction, Ash fakes his death as part of a master plan to stop an evil organization from achieving their goals. He stages his death in a way that makes the organization believe they are safe, but in reality, he is working behind the scenes, gathering evidence and allies. His friends initially mourn his loss, but as the story unfolds, they start to suspect that something is not right and eventually figure out his plan.
Often, the mentor - like characters can be really interesting. They could be an old wizard or a wise hermit who takes Ash under their wing and guides him. Another interesting character might be the antagonist, the person or force that stands in Ash's way as he tries to reach his goals. And sometimes, there are sidekick characters who have their own quirks and add humor to the story.
In this fanfiction, Gary could be an important character. Since he has always been in competition with Ash, he might have mixed feelings about Ash being the chosen one. Serena could also be a main character. She might be inspired by Ash's chosen - one journey and decide to follow him, offering her own skills and support. Professor Oak would likely be involved as well, guiding Ash with his vast knowledge of Pokémon.
There are also often appearances from various Gym Leaders. They can serve as either allies or rivals to Ash. For instance, a Gym Leader might challenge Ash to a battle to test his newfound power, or they could join forces with him to take on a greater evil that threatens the Pokemon world.
There might be some new characters introduced in the fanfiction. A mysterious Pokemon trainer who has some ancient knowledge about Arceus and can guide Ash. Or perhaps a group of Pokemon researchers who have been studying the relationship between Arceus and the world for a long time. These characters could add more depth to the story, providing different perspectives on the situation between Ash and Arceus, and helping Ash in his fight against the perceived betrayal.
Ash Ketchum is the central figure in 'The Secret Life of Ash Ketchum Fanfiction'. Since it's about his secret life, he is the main focus. Pikachu is bound to be there as his sidekick. In addition, antagonists from the Pokémon world could also be main characters in the sense that they create conflict in Ash's secret life. For example, Team Rocket might be more menacing or have different motives in the fanfiction.
Ash Ketchum is the central figure. His harem likely consists of various characters. For instance, Dawn, who is a skilled Pokémon coordinator. She might be part of the harem and brings her own unique personality and skills. May could also be one of the main characters in the harem, with her knowledge of Pokémon contests. And of course, there could be other new or less - known characters added to the harem in different fanfictions.
Obviously, Ash Ketchum is the main character. His Pokémon would also be very important characters. Pikachu, for instance, would likely play a crucial role in helping Ash get around and protecting him. His friends like Misty and Brock could also be main characters, as they would be there to support Ash in his new situation.
His Pokémon are central, as they are always by his side. Pikachu would be a key figure in any story related to Ash. Then there are his human friends. Brock could be involved in cooking for Ash, which might contribute to the weight gain. Misty could be there to comment on Ash's appearance and give her opinions. And in some fanfictions, Nurse Joy or Professor Oak might also be included to provide medical or wise advice regarding Ash's situation.