He could be a time - traveling character. Imagine Rhaegar from his own world ending up in the Harry Potter universe. He could be a key player in changing the course of certain events. For instance, if he has knowledge of a powerful dark magic that is starting to emerge in the Potter world, he might use his skills to counter it.
As a magical prodigy from another world, he might introduce new forms of magic to the Harry Potter universe. This could open up new plotlines where the Hogwarts professors are both intrigued and a bit wary of his abilities. He could start a new school of magic thought that challenges the traditional teachings at Hogwarts.
In some Harry Potter fanfics, Rhaegar might be portrayed as a mysterious figure from another realm or time. He could be a mentor - like character, using his wisdom from his own story's context to guide Harry or other characters. For example, he might share his knowledge of magic that is different from what is commonly known in the Harry Potter universe.
They could be a source of power. If a character needs a powerful object or potion, the alchemist might be the one to create it. Maybe the alchemist has the ability to create a stone that can grant immortality, like the Philosopher's Stone, but with a different twist in the fanfic. This would attract the attention of both good and bad characters, leading to a complex web of events.
Candy often serves as a plot device in Harry Potter fanfics. It can be used to create magical situations. For instance, a character might accidentally eat a mislabeled candy that gives them an unexpected power for a short time.
In some fanfics, the basilisk can be a source of great power for Harry. He might absorb some of its magic or gain a special ability after a close encounter with it.
In some Harry Potter fanfic, eggs could be used in potions. For example, they might be an ingredient for a magical elixir that gives the drinker a short - term boost of energy. Eggs could also be part of a magical creature's diet. Some fanfic might depict Hagrid using eggs to feed his various magical beasts like baby dragons or hippogriffs.
A bartender in a Harry Potter fanfic can play a really interesting role. They could be the keeper of secrets in a wizarding pub, like the Leaky Cauldron. They might overhear all kinds of gossip and important information from the various witches and wizards who come in for a drink. They could also be a source of magical items or potions that are not easily available elsewhere, sold under the table perhaps.
It could be a symbol of strength. Maybe the character with the metal arm has overcome a great danger and the arm is a reminder of their survival and new - found power.
Fair Fortune can play the role of a guiding light. It can lead characters to make the right decisions. For example, if a character is at a crossroads, Fair Fortune might nudge them in the direction that will benefit them in the long run.
She could be a mentor figure. Just as Sherlock Holmes is known for his brilliant mind, Mummy Holmes could pass on some of that wisdom to the young wizards. For instance, she could teach them how to observe details more carefully, which is useful in both detective work and in dealing with the often - tricky magical situations at Hogwarts.
A father in a Harry Potter fanfic could also be an educator. He could teach his children about the wizarding world, its history, and magic spells. He might pass on family - specific magical knowledge that has been passed down through generations.