Simba is a very popular choice. His journey from a cub to a king offers a lot of room for creativity in fanfiction. Nala is also great as she is strong - willed and can be the center of stories about female empowerment in the Pride Lands. Scar is another one, as his villainous nature can be explored further, like what made him so evil.
Well, there are the hyenas. They can be the focus of fanfiction that explores their side of the story. Maybe they were not all bad, and there was a reason for their alliance with Scar. Kiara, Simba's daughter, can also be a great character for fanfiction. Her story of growing up and taking on responsibilities can be developed in different ways. And Mufasa, even though he is no longer alive in the main story, his legacy can be a central theme in many fanfictions.
The king of gods himself is an obvious choice. You can explore his personality, his powers, and his relationships with other gods. For example, his friendship or rivalry with the god of war could make for an interesting story.
Leon Kennedy is a very popular choice. His skills, his backstory from previous Resident Evil games, and his charm make him a great character to build a fanfiction around.
Sasuke is a very popular choice. His complex backstory and brooding personality offer a lot of room for exploration. Fanfictions can delve deeper into his time with Orochimaru, his family's past, and his relationship with Naruto from a different perspective.
Charlie Bucket is a very popular one. You can expand on his adventures after he takes over the factory or his experiences as he first discovers the golden ticket. Willy Wonka himself is also a great focus. His mysterious past and his creative genius can be explored in depth. And of course, the Oompa - Loompas. Their unique culture and their relationship with Willy Wonka can be really interesting to write about.
Clary Fray is also a great character to focus on. Her journey from being a normal girl to discovering the Shadowhunter world is full of potential for fanfiction. Writers can expand on her training, her newfound powers, and how she copes with the dangerous situations she constantly finds herself in.
Clear Rivers is a great character to focus on. Her experience in the first movie and her determination to survive make her an interesting subject for fanfiction. You could explore her life after the events of the movie and how she continues to deal with the fear of death.
Shiro is also a fan - favorite. Her mysterious past and her connection to Ganta make her a great character to write about. You could write a story that reveals more about her origin, or a story where she has to make difficult choices that put her relationship with Ganta at risk.
Arya Stark is a popular choice. Her journey from a young girl to a skilled assassin is full of potential for further exploration. You can write about her new adventures, her relationships, or how she uses her skills in different situations.
Dr. Steve Hardy is a classic character. He has a long history at the General Hospital, so there are many storylines that can be created around him. His relationships with colleagues and patients can be explored further in fanfiction.
Will Stanton is a great character to focus on. He has a lot of potential for character development in fanfiction. His connection to the Old Ones gives him a unique role in the story, and you can explore his struggles with his newfound powers and responsibilities further.