Thestrals could also be the ones to adopt Harry. Since they are associated with death and are only visible to those who have witnessed it, Harry's connection to death (losing his parents) could make a bond with them. They could teach him how to move unseen and sense things that others can't, which would be a great advantage in the wizarding world.
Perhaps he's adopted by a family of house - elves. They teach him their unique brand of magic that is more about domestic and hidden spells. Harry would then have a different perspective on the wizarding world, seeing it from the eyes of those who serve. He could also use this knowledge to help other house - elves gain more rights later on.
Well, the basilisk is a very prominent magical creature in Harry Potter fanfic. It's a giant serpent that can kill with a single glance. Fanfic writers often explore its origin and the mystery surrounding it. Also, the centaurs are quite interesting. They are half - human and half - horse, and in fanfics, they can offer unique perspectives on magic and the wizarding world.
They could encounter a Hippogriff. These magnificent creatures are both proud and dangerous. The twins might have to learn how to approach it correctly, like Harry did with Buckbeak. Another possibility is a Niffler. Given their love for shiny things, it could create some interesting situations if the twins are around one. Maybe they're trying to retrieve something a Niffler has stolen. Thestrals are also an option. Since they can only be seen by those who have witnessed death, if the twins have had such an experience, seeing a Thestral could be a very poignant moment in the fanfic.
In some Harry Potter fanfics, you might find unique magical creatures like the Shrieking Shackle. It's a small, furry creature that can emit a high - pitched shriek to stun predators. Another could be the Glimmerwing, a butterfly - like creature with the ability to turn invisible when it senses danger. These add new and exciting elements to the magical world already established in the original series.
Neville would also make an excellent main character. He has a natural affinity for plants, and magical creatures are not that far off in the wizarding world. He could be the one to discover a new way to care for ailing magical creatures, perhaps using his knowledge of herbology. For example, he might find a plant that can cure a disease that's been affecting the unicorns in the forest.
There could also be a group of pure - blood wizards who look down on Harry's connection with magical creatures. They see it as beneath them and try to undermine his position as the king of magical creatures. They might spread false rumors about him and try to turn other wizards against him.
In Harry Potter fanfic, one interesting magical creature is the Occamy. It's a serpentine - like creature with wings and can grow or shrink to fit available space. Another is the Nundu. It's a large and dangerous beast, said to have a breath so poisonous it can wipe out entire villages. And the Thestral, which is often explored in fanfic in more detail, as it's only visible to those who have witnessed death.
In some Harry Potter fanfics, magical creatures like the werewolf might be portrayed more sympathetically. Instead of just being seen as dangerous during full moons, they could be shown as struggling with their condition. For example, a fanfic might focus on a werewolf trying to lead a normal life among wizards.
Hippogriffs could be involved. They are majestic and powerful creatures. Harry might incorporate the loyalty and strength of a Hippogriff into his noble phantasm. It could have the ability to fly at great speeds and attack enemies with its sharp beak and talons.
A hippogriff is also a possibility. In fanfic, if Harry turned into a hippogriff, he would have to learn how to control his new form. He could make friends with other hippogriffs and gain their trust. This could lead to new alliances in the wizarding world. Also, his hippogriff form would be very useful in battles, as he could use his beak and hooves to attack enemies.