Hermione is quite common. Her intelligence and inquisitive nature make her a great fit for exploring the strange world of Wonderland. She could analyze the different creatures and situations she encounters.
Alice herself is a common character in these crossovers. When she meets characters from Harry Potter, she can share her experiences in Wonderland, and they can compare their different magical worlds. For example, she could talk to Harry about how she dealt with the Queen of Hearts, and Harry could tell her about Voldemort.
The Mad Hatter is often used. His wacky and unpredictable personality can create interesting interactions with the more serious characters from Harry Potter, like Snape. The contrast between their personalities can lead to humorous or thought - provoking scenarios.
In some fanfiction, Harry could be the one who enters Wonderland. Maybe he's on a quest there, and he meets the Cheshire Cat. The Cheshire Cat could guide him, but in a very mysterious way, just like how Dumbledore often gives cryptic advice to Harry. Harry would have to adapt his magical skills learned at Hogwarts to the strange magic of Wonderland.
Draco Malfoy is very common. Since he was the one who actually used the vanishing cabinet in the original books, a lot of fanfiction focuses on his motives and actions related to it. Harry Potter himself is also often in these stories. He might be trying to stop Draco from using the cabinet for evil purposes or exploring the secrets of the cabinet himself. Hermione Granger could be another one. Her intelligence might be used to figure out how the cabinet really works or to counter any dark magic associated with it.
Hermione Granger is also a popular choice. Given her intelligence and love for learning about potions, it's easy to imagine her either creating more Felix Felicis or using it in a clever way to solve a problem at Hogwarts.
Harry Potter himself is often a popular character in these crossovers. Writers like to imagine how he would react to the Pokemon world. He might be intrigued by the concept of Pokemon training and try to incorporate some of the Pokemon's abilities into his fight against Voldemort.
Definitely Iron Man and Harry Potter. Iron Man's cool gadgets and snarky personality combined with Harry's magical abilities and heroic nature make them a great pair in crossovers.
Harry Potter himself is quite popular. His status as the Boy Who Lived gives him a certain allure in the crossovers. Fans like to imagine how he would handle the different threats in the Shadowhunter world. Clary Fray is also a favorite. Her journey as a Shadowhunter, especially her discovery of her powers, can be paralleled with Harry's discovery of his wizarding abilities. And when they interact, it can lead to some really engaging storylines.
Definitely Harry Potter. Since he's the main character of the original series, many fanfiction writers like to put him in new situations, whether it's facing a new dark wizard or exploring a different kind of magic. Hermione is popular too. People are interested in her intelligence and how she might use it in various scenarios not covered in the books. Ron Weasley also has his fans in the harry potter wonderland fanfiction world. Writers might explore his growth as a wizard and his role in different adventures, especially when it comes to his loyalty to his friends.
I think the White Rabbit is quite interesting. He's the one who leads Alice into Wonderland in the first place. He's always in a hurry, worried about being late, and this sense of urgency in a world full of chaos is really captivating. Also, Tweedledum and Tweedledee are interesting as they are always bickering and reciting rhymes.
The Cheshire Cat is really interesting. It can disappear and reappear at will, and it gives Alice some very cryptic advice. Then there's the Mad Hatter. His crazy tea party and his odd behavior make him stand out. Also, the Queen of Hearts is quite fascinating. Her quick temper and her 'off - with their heads' attitude add a lot of drama to the story.
The Cheshire Cat is very interesting. It has that ability to disappear and reappear at will, and it gives Alice some rather cryptic advice. Then there's the Mad Hatter. His crazy tea parties and his erratic behavior make him quite a memorable character. Also, the Queen of Hearts is interesting. Her short temper and her 'Off with their heads!' catchphrase add a lot of drama to the story.