Well, it could be really interesting. Maybe a character from Harry Potter like Hermione could end up in the world of Sweeney Todd. She might use her intelligence to try and stop Sweeney Todd from his murderous spree in a more magical way. For example, she could use spells to make his razors disappear or to calm his rage. It would be a clash of two very different worlds, the magical and the dark, gritty world of Sweeney Todd.
A crossover could involve the Dementors from Harry Potter showing up in Sweeney Todd's London. They could feed on the despair and fear that already exists there. And perhaps Sweeney Todd himself would be one of the few who could see them clearly, mistaking them for some sort of dark omen related to his own revenge. The characters from Sweeney Todd might be both terrified and intrigued by the magic of the Dementors.
One idea could be that Harry Potter's Hogwarts is transported to the time and place of Sweeney Todd. The students would be shocked to find themselves in such a dark and dangerous place. The Weasley twins might try to make the best of it and start selling some of their magical prank items to the people of London. Meanwhile, Sweeney Todd might see the Hogwarts students as a threat to his plans or as a new source of victims, leading to a tense stand - off.
The magic system from Harry Potter would likely have a huge impact on Sweeney Todd's world. Spells like Lumos could light up the dark alleys of London where Sweeney Todd lurks. Wizards and witches could use magic to heal the sick and injured in that world, which is very different from the rather hopeless medical situation in Sweeney Todd's setting. Magic could also be used to expose Sweeney Todd's crimes more easily.
A crossover with 'Les Misérables' could also be interesting. Picture Jean Valjean finding himself in the midst of the chaos on Fleet Street. He could try to save some of the poor souls that Todd is bent on destroying. Todd, on the other hand, might see Valjean as a threat to his own vendetta. This would create a great conflict between the two characters' different moral compasses.
To write a believable character interaction in a Sweeney Todd crossover, first, understand the personalities of the characters involved. For example, if crossing over with a heroic character like Sherlock Holmes, Holmes would be very observant of Todd's actions and motives. He would question Todd's every move. Todd, in turn, might be initially hostile towards Holmes as he sees him as a threat to his plans. You need to show how their different worlds collide. Holmes comes from a world of logic and deduction, while Todd is driven by revenge and madness.
In this fanfiction, Harry could be on a quest to protect dragons. Given his kind heart, he might learn about the cruel treatment of dragons in some parts of the wizarding world, like in dragon - breeding for the Triwizard Tournament. So he decides to take a stand and try to ensure their well - being. This could lead to him making new friends or enemies in the process, and exploring new parts of the wizarding world that are related to dragons.
Well, perhaps in the fanfiction, Mrs. Lovett's pregnancy is a result of a moment of unexpected tenderness between her and Sweeney Todd. As she is pregnant, they have to deal with the physical and emotional changes. Sweeney Todd, who is so consumed with his revenge, now has to also think about protecting his new family. Mrs. Lovett, on the other hand, is worried about how the pregnancy will affect their business. They might have to find a way to balance their normal life, their business, and the upcoming addition to their family.
The story of Sweeney Todd centers around a wrongly accused barber who returns to London and starts a murderous spree. It's a tale filled with drama, horror, and a bit of romance.
In a Fem Harry Potter is Enkidu fanfiction, it might show Fem Harry Potter idolizing Enkidu. She could study the stories of Enkidu and try to incorporate some of his values into her life in Hogwarts. Since Enkidu was known for his strength and his relationship with Gilgamesh, Fem Harry Potter could perhaps form a similar strong bond with one of her friends, like Hermione or Ron, inspired by Enkidu's story.
Well, 'harmony' in Harry Potter fanfiction often refers to the pairing of Hermione and Harry. A'redo' could mean rewriting the story with a different focus on their relationship. Maybe it gives them more romantic moments earlier on, or changes the events that led to their relationship developing differently than in the original books.
A phylactery in the context of some fictional lore is often associated with dark magic and immortality. In a fanfiction where Harry Potter makes a phylactery, it could be a very dark turn for his character. Maybe he's been corrupted by the idea of never dying after facing so many near - death experiences. It could also mean that he's delved into some really old and dangerous magic that he doesn't fully understand. This could lead to a story where he has to grapple with the moral implications of creating such a thing, as well as deal with the reactions of his friends and the wizarding world at large.
It could entail Harry having the powers of a dovahkiin. So he might be able to shout like a dragon and have enhanced physical abilities. He could use these powers to fight Voldemort in a completely different way, perhaps using dragon shouts to disarm or stun death eaters.