Obviously, Albert Wesker would be the main character. But there could also be other Resident Evil characters like Chris Redfield. Their relationship in the games has been complex, and in the fan fiction, it could be explored further. Maybe they start as enemies but then find common ground in a particular situation.
The fan fiction might focus on Wesker's powers. It could show how he discovered and developed his superhuman abilities like enhanced strength, speed, and his unique regenerative capabilities. It might also include scenarios where he uses these powers in unexpected ways, either for good or evil, depending on the author's take on the character.
Well, of course, there's the little vampire himself. He could have a best friend who is a human, a brave kid who is not afraid of the vampire's nature. There might also be an old vampire mentor who teaches the little one about vampire traditions and how to control his thirst.
A unicorn from the main pony world who gets lost in the other side could be a main character. Their magical abilities might be different or not work as well in the other side, leading to an interesting story of adaptation.
Twilight Sparkle from My Little Pony could be a main character. She's very intelligent and curious, so she'd be interested in learning about Pokémon. Ash from Pokémon could also be a main character as he's always up for new adventures and meeting new creatures. Together, they could lead the story, with Twilight using her magic and Ash his Pokémon - training skills.
One potential character could be a healer. In the fan fiction, this healer could be the one Anxiety turns to in order to regain his voice. There might also be a sidekick for Anxiety, someone who has been with him through thick and thin. Additionally, there could be a group of elders in the fictional world who hold the secrets to restoring voices and are the key to Anxiety's journey of getting his voice back.
Obviously, Harry Potter himself is a central character. There could be his adoptive parents. They might be kind-hearted wizards or witches who take Harry in. And perhaps his new siblings, if there are any in the adopted family. There could also be some of his friends from Hogwarts who interact with him in this new situation.
A young, inexperienced wizard could be added. He could be seeking the main character's guidance and in the process bring some new magic elements into the story. Another potential character could be a fierce warrior from a far - off land, who has different combat techniques and a unique code of honor. There could also be a mysterious old hermit who has knowledge of ancient prophecies related to the main character's journey.
An old mountain man who has been living in a different part of the mountain for decades. He could be a bit of a mystery at first, with his own set of rules and traditions. Sam could meet him during one of his explorations and they could share stories of their experiences in the wilderness. The old man could also teach Sam some ancient survival techniques that have been passed down through generations.
Obviously, the bumblebee itself is a main character. There could also be other insects like butterflies, ladybugs, and ants. Maybe a wise old spider who lives in a corner of the garden and gives advice to the bumblebee.
A wise old owl could be a new character. This owl could be the one who actually has knowledge about the real threats (or lack thereof) in their world. Maybe he tries to guide Chicken Little and the other animals. Another potential character could be a mischievous squirrel. The squirrel could be constantly causing small troubles that make Chicken Little think the sky is falling all over again. For example, it could knock down acorns that make loud noises.