Dumbledore could also be a popular character to include. His wisdom and power would make for an interesting interaction with Willy Wonka. He could be intrigued by Wonka's magic, which is different from the wizarding magic in the Harry Potter series. And the Weasley twins might be included as they could get up to all sorts of mischief with Wonka's magical candies.
The Oompa - Loompas are a must - include. They can add humor and a touch of mystery to the story. For example, they could be the ones to guide the reader through the factory when Willy Wonka is busy.
Harry Potter himself is of course very popular. Writers can explore different aspects of his character, like what if he had made different choices during his adventures. Hermione is also a favorite. Her intelligence and strong - willed nature can be developed further in fanfic, perhaps she could take on even more challenging magical research.
Harry, Hermione, and Ron are obvious choices. They are the main characters in the original series, so fans love to continue their adventures in fanfics. Draco Malfoy is also very popular. You can explore his character more deeply, like showing his possible redemption arc or his inner thoughts during his time at Hogwarts. Luna Lovegood is another favorite. Her unique personality and way of seeing the world make her a great addition to fanfics. And Severus Snape, with his complex backstory and motives, is often included in fanfics as well.
In the Willy Wonka original story, Willy Wonka is the most memorable without a doubt. His creative genius, his secretive nature and his ability to create such a magical place are all fascinating. Charlie Bucket also stands out as a symbol of hope and kindness in a rather dark and greedy world of the other children. And Mike Teavee, the boy obsessed with television, is memorable for his brash and modern - minded attitude compared to the other more traditional greedy traits of the other kids.
For me, the most interesting character is Willy Wonka. His backstory is so mysterious, and his inventions are mind - boggling. Charlie Bucket is also a great character. His family's poverty makes his experience in the factory all the more special. And Augustus Gloop is quite a character too. His gluttony is so extreme that it leads to his first 'disaster' in the factory, which is both funny and a bit sad.
Charlie Bucket is very memorable. He is the kind - hearted protagonist who comes from a poor family but has a pure heart. Willy Wonka himself is also unforgettable. He is this eccentric and creative chocolatier. And then there's Veruca Salt. Her spoiled brat behavior makes her stick in the mind as she demands everything she wants immediately.
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.
One interesting crossover could be the use of magic candies from Willy Wonka's factory in the wizarding world of Harry Potter. For example, a fanfic might have a situation where a character finds a Wonka candy that gives them a special magical ability, like the ability to speak to animals, which could be a really fun and unique addition to the magic already present in the Harry Potter universe.
Obviously, Willy Wonka himself is a must - include. He's the heart and soul of the factory. Charlie Bucket is also great as he represents the pure - hearted visitor. The Oompa - Loompas add a lot of fun and mystery with their strange songs and unique appearance. Veruca Salt can bring in some drama as she was the spoiled brat in the original story.
The Oompa - Loompas would definitely be main characters. They could play the role of protectors or guides for the baby. Charlie Bucket could also be a main character, perhaps as an older brother - like figure to the baby. Veruca Salt might be there too, causing trouble as she usually does and trying to get the baby on her side to help her get more candies.