There could be new characters introduced as well. For example, an old wizard or witch who has knowledge about the specific creature inheritance Harry has. They could be a mentor figure, teaching Harry how to control and use his newfound abilities. And of course, the antagonists like Voldemort would be affected by Harry's new powers. They might try to find a way to counter or steal Harry's creature inheritance powers.
Harry Potter himself is often a central character in such fanfictions. Given his connection to various magical creatures throughout the original series, it's not a stretch to imagine him inheriting something related to a rare creature. Hermione could also be a common character. Her thirst for knowledge might lead her to discover or be involved in a rare creature inheritance. Ron, with his Gryffindor bravery, might also be in the mix, perhaps inheriting a trait from a more combat - related rare creature.
In fanfictions about Harry getting his creature inheritance, he may inherit from a magical creature like a dragon. This could endow him with incredible strength and the ability to breathe fire (in a more magical and less destructive way, perhaps). It could also make him more resistant to heat and fire - spells related to fire might not harm him as much. This new inheritance would likely change his relationships too. His friends might be in awe of his new powers, and his enemies would be more cautious around him.
Harry Potter himself could be a common character. There could be fanfics where he discovers some hidden creature inheritance within himself that gives him new powers or abilities. Another one might be Hermione. She could be researching about creature inheritances and accidentally stumble upon something related to her own family.
Hermione would most likely be involved. She's Harry's best friend and would be eager to help him understand and manage his inheritance. She could use her vast knowledge of magic and research skills to uncover the secrets behind it.
New original characters are also common. These are characters created by the fanfiction authors who might be the sole heir to a long - lost inheritance of a royal creature. They could be an ordinary wizard at first, but then find out they have a connection to a powerful and mysterious royal creature like a basilisk. Their journey to understand and embrace this inheritance forms the main plot of the story.
Obviously, Harry is the most important character. Then there might be his friends like Hermione and Ron. They could help him understand and manage his inheritance. There may also be some new characters, like an old wizard who is the keeper of the inheritance until Harry is ready. And of course, the antagonists like Draco Malfoy or any remaining Death Eaters might be interested in his inheritance, either to steal it or to stop Harry from using it to gain more power.
Draco Malfoy can be a key character too. Maybe he inherits the pride and territorial nature of a dragon - like creature. This would add an interesting dimension to his character, as he would have to deal with this new part of himself while also navigating his family's expectations and his own place in the wizarding world.
In this kind of fanfiction, creature inheritance often works through family bloodlines. If a family has a long - ago connection to a certain creature, like an ancestor who made a pact with a unicorn, that connection might be passed down generations. It could also be triggered by a magical event. For instance, if a character is in a place where a powerful magical creature once lived and a magical energy is released, it could awaken the inheritance.
Another aspect could be related to his family heritage. Harry could inherit a special magical artifact that was passed down through the Potter family. This artifact might hold the key to some long - forgotten magic or a prophecy. As he explores his inheritance, he uncovers secrets about his family's past and its connection to the overall history of the wizarding world, which in turn helps him in his fight against Voldemort.
In 'Harry Gets His Inheritance' fanfic, Harry may get some really cool magical items as part of his inheritance. Maybe a wand that has special powers or a cloak that has enhanced invisibility. His inheritance could also include knowledge, like a hidden library full of rare magic books. This knowledge would make him a much more powerful wizard. And it might also lead to some interesting relationships. For instance, he could be related to some powerful wizarding families through his inheritance, which would change the way others in the wizarding world view him.