I'm not sure specifically as there are many different fanfictions with this title. It could be about Harry Potter having a very strange or unexpected magical creature as his familiar, perhaps a creature from a different magical realm or one with unique powers.
In this fanfiction, Harry Potter is the central figure. His unusual familiar, which could be a creature that has never been seen in the wizarding world before, is also a main character. Additionally, the professors at Hogwarts, such as Dumbledore or Snape, could play important roles. Dumbledore might offer his wisdom regarding the familiar, while Snape could be initially distrustful. And of course, Harry's friends, they could be there to support him, offer advice, or get into some comical situations because of the unfamiliar nature of this new familiar.
If the familiar is something like a dragon, it could greatly impact the plot. Dragons are powerful and feared. The character with the dragon familiar might be constantly hunted by those who want to use the dragon for their own purposes or those who fear its power. This would create a lot of conflict and drive the story forward as the character has to protect their dragon and themselves.
One example could be a phoenix. In regular Harry Potter lore, only Dumbledore has a phoenix as a familiar. But in fanfiction, a character like Harry could have a phoenix as his unusual familiar. It could be a sign of his special connection to magic and his destiny, as phoenixes are symbols of rebirth and great power.
In some fanfictions, he might find it in the Forbidden Forest during one of his adventures. Maybe while exploring the deeper parts of the forest that are off - limits to most students, he stumbles upon a young pegasus in need of help. Harry, being the kind - hearted person he is, bonds with the pegasus and it becomes his familiar.
Well, perhaps the plot could involve Harry finding a dragon egg and raising the dragon as his familiar. This would bring a whole new set of adventures as he has to hide the dragon from the Hogwarts faculty who might not be too keen on a dragon on campus. He could also use the dragon's special abilities to his advantage in his battles against Voldemort.
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.
Maybe through some kind of magical encounter in the Forbidden Forest. He could be on a special mission or adventure and stumble upon the Nemean Lion. The lion might sense that Harry has a pure heart and a great need for a powerful familiar, so it decides to bond with him.
A lot of fanfictions are written by amateur authors, so the quality can vary. However, if you search on specialized Harry Potter fanfiction forums, you may find some well - recommended ones. People on those forums often discuss and review fanfictions, and they might be able to point you towards a great story about Harry and his dragon familiar.
The plot could involve the wolf familiar helping Harry in his battles against Voldemort. Maybe the wolf has special senses that can detect dark magic, allowing Harry to be one step ahead. For example, it could sniff out Death Eaters' hiding places.
One possible plot could be a young wizard accidentally summons a sucubus as a familiar. The sucubus, instead of being purely malevolent, has her own motives and secrets. She could help the wizard in his adventures at Hogwarts while also causing some chaos due to her nature. For example, she might use her charm to get out of tricky situations or to get information from other students or teachers, but this also gets the wizard into some trouble with the school authorities.