A possible main American character could be a wizard named Oliver. He has a deep understanding of the magical ley lines that run through America. In the fanfiction, he discovers that these ley lines have a connection to the magic in the UK and uses this knowledge to boost the overall magic in Hogwarts during the fight. Another could be a witch named Sophia. She is an expert in a form of magic called 'Dreamwalking'. She can enter the dreams of the dark wizards and either gather information or disrupt their plans. And there's a young American wizard named Tyler who is a natural at flying magic and uses his skills to outmaneuver the enemy in aerial battles.
One could be an American wizard named Jack. He could be a powerful spell - caster from a prominent American wizarding family. Maybe he's an expert in elemental magic, which is more developed in the American wizarding community. Another could be a witch named Lily (not related to Harry Potter's mother). She could be a healer who has knowledge of unique herbs and potions found only in America. And there could be a young American wizard named Max who is really good at magical inventions. He could create devices that help in the fight against the dark forces in the Harry Potter world.
There might be an American wizard called Daniel. He's a bit of a maverick, not following all the traditional wizarding rules. He has a special talent for communicating with magical spirits, which is considered a rare ability in the American wizarding world. Then there's a female wizard, Emma, who is a master of illusion magic. She can create large - scale illusions that can deceive the dark wizards. And there's also a grizzled old wizard named Benjamin, who has fought many battles in the American wizarding world and brings his vast experience to the fight in the Harry Potter universe.
In this story, the American wizards could be alerted to a threat in the UK wizarding world through some sort of magical communication network. They arrive just as Voldemort is about to unleash a spell that would destroy all non - pure - blood wizards. The Americans bring with them magical creatures that are native to their land and can be used in the fight. These creatures might have abilities that are unknown to the British wizards. The American wizards also use their own style of dueling, which is more aggressive and fast - paced. They team up with the Hogwarts professors and students, and through a series of intense battles and strategic moves, they are able to stop Voldemort and save the day.
Obviously, Harry Potter and the Jedi would be the main characters. Maybe Luke Skywalker and Harry could form an alliance.
Obviously, Harry Potter would be one of the main characters. Since it's about him saving the Flamels. The Flamels themselves, Nicolas and Perenelle, would also be main characters as they are the ones being saved.
It could be a dark wizard who has his eyes on Cintra's powerful magical artifacts. He wants to use them to gain more power and is willing to destroy Cintra to get them.
It could be a rogue Death Eater who has escaped from Azkaban. This Death Eater might be desperate to regain his power and believes that unicorn blood will give him the strength he needs. So he sets out to capture a unicorn in the Forbidden Forest, which is where Harry comes in to stop him.
It could be Death Eaters who have a new plan. They might want to create chaos in the Muggle world by targeting the Queen. They see her as a symbol of Muggle power and order, so by attacking her, they hope to disrupt the Muggle - wizard relationship.
It could be a dark wizard who has a vendetta against goblins. This wizard might see goblins as a source of power or wealth and wants to enslave them. So when Harry tries to save the goblin, this dark wizard becomes the main obstacle.
In this fanfiction, Neville could also play a role. He has grown into a brave and capable wizard. He might use his skills with plants to create some sort of magical plants that could help, like plants that can grow quickly to block the path of the iceberg or to repair any damage to the ship. And Luna could be there with her unique perspective, perhaps she could sense the danger in a different way and help Harry in his mission to save the Titanic.
Harry might meet some American wizarding families that have long - standing traditions different from the pure - blood families in the UK. These families could introduce Harry to new forms of magic and social norms within the American wizarding community. He could also meet American Muggle - born wizards who have their own unique stories of discovering magic in a different cultural context compared to what he's used to.
It could be a powerful dark wizard who has a grudge against the goblins. Maybe he wants to steal the goblin's vast treasures and is willing to get rid of the Goblin King to do so.