Perhaps in this fanfic, there is some sort of danger in the wizarding world that can only be overcome by Harry and Remus having this special familiar - master relationship. Harry might turn Remus into his familiar to protect him from a dark force that is specifically targeting werewolves. As they navigate this new dynamic, they also have to deal with the reactions of their friends and the wizarding community at large. The story could explore themes of acceptance and the power of unconventional relationships.
One conflict could be the ethical implications of turning a human into a familiar. In the wizarding world, there are likely rules about this sort of magic, and Harry might face consequences for his actions.
The main characters would obviously be Harry Potter and Remus Lupin. Harry is the one who turns Remus into his familiar, so he is a central figure in this fanfic's unique plot. Remus, on the other hand, has his own complex identity as a werewolf and a former teacher at Hogwarts, and now he is in this new and rather strange relationship with Harry as his familiar.
Well, it could lead to some really interesting magical adventures. Maybe Harry would have Remus in an animal form to help him with certain tasks or investigations. Remus, in his familiar form, might be able to access places that are difficult for humans to reach, providing Harry with valuable information.
Well, one possibility is that Harry discovers a new magical ability that allows him to make a familiar. He chooses Remus because of their strong bond. Then, they might have a deeper connection in battles, with Remus being able to sense Harry's needs and intentions more acutely. Maybe Remus could also gain some new powers or abilities as Harry's familiar, which would be really interesting to explore in the fanfic.
Remus might become more submissive in a way. Since he is now Harry's familiar, he has a certain obligation to follow Harry's lead. However, he would still retain his intelligence and wisdom. For example, in a battle, he might be more likely to wait for Harry's command rather than act on his own instincts immediately.
Well, perhaps Remus arrives just in time to save Harry from a group of Death Eaters. He uses his werewolf skills and magic to fend them off.
In a fanfic where Harry Potter makes Remus Lupin his familiar, it could open up a whole new world of possibilities. First, it would redefine the concept of familiar in the wizarding world. Since Remus has his own complex backstory and relationships, it would add layers to Harry's character development. Harry might have to deal with the prejudice that some wizards have towards werewolves more directly. And Remus, in turn, would have a new role and purpose. He could be more protective of Harry, and they could communicate in a more instinctive way, similar to how a wizard and a traditional familiar communicate.
A fanfic could be centered around a magical plant that has the power to cure lycanthropy. Remus hears rumors of this plant in the Forbidden Forest. He ventures in, facing various magical creatures and dangerous terrains. When he finally finds the plant, he has to figure out how to use it properly. This could involve a series of trials and errors, and perhaps some help from Hagrid who knows the forest well.
The plot could start with Harry stumbling upon Cerberus in a hidden part of Hogwarts. He feels an instant connection and decides to try and make Cerberus his familiar. This would be a difficult task as Cerberus is known to be very fierce. But Harry's kindness and his ability to understand magical creatures might win Cerberus over.
He might use his Patronus. His Patronus could guide Harry out of a dangerous place or ward off Dementors that were about to attack Harry.