Yes, there are quite a few. Some focus on how the character as the heir of Merlin uses ancient magic in the Harry Potter universe. You can find them on fanfiction platforms like FanFiction.net or Archive of Our Own.
Power and responsibility is a big one. Since the character has a connection to Merlin, they have to deal with the power that comes with it and the responsibility to use it well. Also, the exploration of ancient magic and how it fits into the existing Harry Potter magic world is quite common. For instance, they might explore how Merlin's magic is different from what is currently taught at Hogwarts. There could also be themes related to prophecy and destiny, as the character's new identity as the Heir of Merlin may be tied to some greater purpose in the wizarding world.
One great aspect of Harry Potter and Merlin Emrys fanfiction is the unique crossovers. Writers often bring the magic of the Harry Potter universe together with the ancient and powerful magic associated with Merlin Emrys. It can lead to some really interesting storylines, like Harry finding an ancient spell book that was once Merlin's and using it to defeat a new dark wizard. The fanfiction world allows for a lot of creativity in exploring these two magical realms and how they could interact.
One common theme is self - discovery. Harry, as the heir of Emrys, often has to figure out what this new identity means for him and how it changes his place in the wizarding world.
The exploration of magical heritage is a significant theme. Harry has his own complex magical heritage, and Merlin is a figure deeply rooted in magical history. Fanfiction may explore how their heritages are related or could influence each other. For example, it could be discovered that Harry has a distant connection to Merlin's line. Additionally, the theme of friendship and loyalty is common. Writers might depict how Harry and Merlin form a strong bond of friendship, and how that loyalty is tested in the face of various challenges in the magical world.
One popular 'Harry Potter Heir of Emrys' fanfiction is 'The Heir of Emrys' by [author name]. It has an interesting plot where the main character discovers their connection to Emrys in a very unexpected way. The story also has great character development, especially for Harry as he delves deeper into his newfound heritage.
Another possible candidate in fanfictions could be Neville Longbottom. He has a deep connection to the magical world and shows great courage and growth throughout the series. His latent magical abilities, which are finally fully realized, could be interpreted as him being an heir of Merlin in a way. He has the potential to be a great wizard, just like Merlin was.
Well, it depends on the specific fanfiction. Some fanfiction authors might create a really elaborate backstory where Harry Potter is somehow related to Merlin as an heir. They could base it on things like similar magical abilities, a prophetic connection, or a hidden bloodline. However, not all fanfictions follow this concept. There are many different takes on Harry's story in the fanfiction world, and this is just one of the more imaginative ones.
This fanfiction probably delves into the idea of Harry having a connection to the great wizard Merlin (Emrys) and the powerful sorceress Le Fay. It could explore how this inheritance gives him unique abilities that were previously unknown. For example, he might gain the ability to perform extremely powerful spells or have a deeper understanding of magic. It could also introduce new characters related to Emrys and Le Fay's past who help or hinder Harry on his journey.
Harry Potter is the central figure as it's about his connection to Emrys and Le Fay. There could be other characters like Hermione and Ron who support Harry in his journey to understand and utilize his new heritage. Additionally, there may be some original characters created specifically for this fanfiction, such as an old wizard who has been guarding the secrets of Emrys and Le Fay for centuries and now helps Harry on his path.
It could be a previously unknown student at Hogwarts. Maybe a shy Ravenclaw who has always been good at spells that require great intelligence and wisdom, which are traits often associated with Merlin.