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.
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.
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.
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, in this fanfiction, the tiger familiar may have special abilities. It could be able to sense danger before Harry does. So it would lead Harry away from places where there are traps or lurking enemies. Also, being a large and intimidating animal, it can act as a deterrent to some of the less brave adversaries that Harry might face, making it easier for him to get through certain areas or tasks.
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.
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.
The phoenix might also be able to teach Harry in a way. Since it has its own kind of magic, it could show Harry things like how to control his magic better when it comes to difficult spells. It could demonstrate its own magic, like its ability to rise from ashes, and Harry could learn from that to be more resilient in his studies and face challenges in a new way.
Well, 'Familiar of Zero' in Harry Potter fanfiction could also mean a new take on the idea of familiars in the Potterverse. Instead of the traditional owls, cats, and rats, the fanfic could introduce familiars like those in 'Familiar of Zero' which might have more complex personalities and abilities. It could change the way magic is perceived in the fan - made story. For instance, if a familiar has the ability to communicate telepathically like some in 'Familiar of Zero', it could add a whole new layer of mystery and intrigue to the relationships between wizards and their familiars in the Harry Potter - inspired fanfic.