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.
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.
It's hard to say without reading it, but it could be the main trio - Harry, Hermione, and Ron. They often get involved in all kinds of magical situations in fanfiction.
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 concept is the inheritance of the shape - shifting abilities of certain magical creatures. Imagine a character who unknowingly inherits the ability to transform into a phoenix. This would bring not only a unique power but also a great responsibility as phoenixes are often associated with rebirth and renewal. The character would have to learn to control this power and deal with the consequences of being different from others in the wizarding world.
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.
One good example could be 'The Veela's Heir' where Fem Harry has Veela inheritance. It shows her dealing with newfound powers like charm and allure. Another might be a fanfic where she has werewolf inheritance, facing the challenges of a dual nature. There are also those where she inherits some magical creature's wisdom, like a phoenix, which gives her the ability to heal and rise from difficult situations.
One interesting concept could be the inheritance of magical abilities related to specific creatures. For example, a character might inherit the ability to communicate with snakes like Salazar Slytherin because of some ancient creature - related inheritance in their family line.
Hermione would definitely be important. She could use her extensive knowledge to help Harry understand his creature inheritance. For example, she might research ancient texts to find out more about the origin of his inherited traits.
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.