The main ones are Harry and Ginny. But Fleur and Bill could be involved as well, sharing their own wedding experiences with the couple. Ginny's brothers other than Ron, like Percy, would be there in their formal robes. Percy might even give a speech at the wedding. Cho Chang could be an unexpected guest, showing that there are no hard feelings between her and Harry. And then there are all the Hogwarts professors, like McGonagall, who would be there to bless the union and make sure everything runs smoothly in the magical aspects of the wedding.
Definitely the Weasley family. Molly and Arthur Weasley would be very much involved. Molly would be all excited about the wedding preparations, fussing over Ginny's dress and the food for the reception. Arthur would be there to offer his support and probably share some interesting wizarding stories. Ron and Hermione would also be there. Ron as Harry's best friend would be part of the pre - wedding jitters and celebrations. Hermione would be helping Ginny with all the details, like choosing the right flowers and making sure the wedding venue is decorated perfectly.
Definitely the Weasley twins, Fred and George. They are known for their love of mischief and innovation. They would be all over the idea of street racing in the wizarding world. They could create all sorts of magical gadgets to use during the races. Another character could be Draco Malfoy. He would likely be a rival racer, using his family's wealth and influence to get the best magical racing equipment.
Harry himself is very likely to be involved. Given his many encounters with death, from facing Voldemort to losing loved ones, he has a deep connection to the concept. He would be exploring the aspect of death perhaps to gain more power to protect his friends and the wizarding world.
Obviously, Harry and Ginny are the main characters. Their kids would be important characters too. For example, James, Albus, and Lily. Then there could be their friends like Ron and Hermione, who might be the godparents or just good friends who are always around to give advice or help out.
Well, Harry and Fleur are the stars of the 'Harry and Fleur Wedding Fanfiction'. But don't forget about the magical creatures that might be involved. Maybe a house - elf or two are helping with the preparations. Hagrid could also be there, bringing his unique charm and love for Harry. And then there are the other witches and wizards from the wizarding community. Some old professors from Hogwarts could show up, like Professor McGonagall, who would surely have some opinions on the grand wedding.
Homer Simpson is very likely to be involved. He's the main character and his bumbling yet loveable nature can create a lot of comical situations in crossovers. For instance, if it's a crossover with 'The Flintstones', Homer would probably be trying to out - eat Fred Flintstone at the local diner.
Obviously, Harry, Hermione and Ron are the most likely. They are the main characters and are always together, so it's natural for them to be playing truth or dare. Neville could also be involved as he's their friend. And Ginny might join in too, especially as she gets older and becomes closer to the group.
Definitely Harry Potter himself. He's the central character in his own series, so it's likely he'd be involved in any crossover. Hermione Granger could also be a key character as she's smart and curious, and would be interested in learning about the 'Twilight' world. From 'Twilight', Edward Cullen is an obvious choice. His brooding nature and unique abilities would make for interesting interactions with the 'Harry Potter' characters. Also, Jacob Black could be involved, especially when it comes to the 'imprint' aspect as he has his own story arc related to that in 'Twilight'.
Hermione Granger is also a likely character. Her intelligence and love for knowledge could lead her to discover a way to bridge the past and the future. She might use her Time - Turner knowledge or find some new magical method. And she could play a key role in helping past characters adapt to the future or vice versa.
Obviously, Harry himself is the central character. Then, there could be characters like Dumbledore who might play a role in guiding Harry about his new heritage. Hermione would also likely be involved, using her knowledge to help Harry understand the Pendragon history.