Lilith Lemon could be a magical creature in human form. In the Harry Potter universe, there are many such beings. She could have some special powers or abilities that are related to nature. Harry Potter might first be suspicious of her but then realize she is on the side of good and they could team up to protect the wizarding world from a new threat.
A priest could be a healer in the wizarding world. Just as priests in real life are often associated with providing spiritual and sometimes physical comfort, in the 'Harry Potter' universe, he could use his religious knowledge along with magic to heal the sick or injured wizards. For example, he might say prayers while using a spell to soothe a patient's mind and body.
Riolu can fit in as a magical creature. It could be a creature that has been hidden in the wizarding world for ages and is now discovered by a Hogwarts student. For instance, it might live in the Room of Requirement, which has all sorts of hidden things. The student could then form a bond with Riolu and they embark on adventures together.
Shukaku could be a powerful magical beast that has been sleeping deep within the grounds of Hogwarts for centuries. Only a very powerful spell or a unique combination of spells could awaken it. Once awakened, it could either be a great ally or a terrifying foe depending on how the wizarding community treats it.
She could be a powerful ally. Since Bella has enhanced physical abilities in her own story, in the Harry Potter universe, she could use those to help in battles. For instance, she could be part of the Order of the Phoenix and use her speed and strength to fight against Voldemort's forces.
In fanfiction, Mora could be connected to the Room of Requirement. The room could be a gateway to his domain, and only those who are truly seeking knowledge would be able to access it. So, a character like Hermione might accidentally stumble upon this connection while researching in the room.
Another way is that the Black Shuck is a manifestation of an ancient magic that has been long forgotten. A group of students in the fanfiction could discover some old texts about it and decide to investigate. As they dig deeper, they find out that this Black Shuck is connected to a much larger mystery that could change the way they view the history and magic of the wizarding world.
A sucubus familiar could be a magical being from a far - off and dark corner of the wizarding world. It could be that a powerful and unorthodox wizard has managed to bind it as a familiar. In the Harry Potter universe, it might be seen as a very dangerous and controversial choice. For example, Dumbledore might be extremely cautious about it, while some dark wizards might be envious and try to steal it.
They might be a time - traveler as well. The Doctor Master could go back in time to the days when the founders of Hogwarts were alive. They could influence the development of magic in the wizarding world, perhaps by introducing new ideas about the relationship between magic and nature. This could have a ripple effect on the events that occur in Harry Potter's time, like creating new spells or magical artifacts that are based on their unique perspective.
She could be a long - lost relative of one of the existing characters. For example, if she's related to Hermione, it could bring a new dynamic to their friendship with Harry. They could all study together and share knowledge in a different way.
Some fanfictions make Arrancar into students at Hogwarts. This is really interesting as they have to adapt to the rules and the way of life at Hogwarts. They might have trouble with things like the House system or following the instructions of the professors, given their different upbringing in the Arrancar world. Their combat - based powers can also make them stand out in classes like Defense Against the Dark Arts.