A story could revolve around a character who has both the powers of a wizard from Harry Potter and the skills of a Kekkaishi. This character is an outcast in both worlds because they don't fit into the normal categories. They have to use their unique abilities to bridge the gap between the two worlds and prevent a war that is brewing due to misunderstandings between the magical communities.
One idea could be a crossover where the magical creatures from Harry Potter somehow end up in the world of Kekkaishi. For example, a hippogriff might be mistaken for a powerful yokai. Another could be a wizard from the Harry Potter universe getting lost and stumbling into the territory protected by the Kekkaishi, and they have to work together to deal with a common threat that is a mix of dark magic and powerful yokai.
Perhaps a plot where the Death Eaters in Harry Potter team up with some of the more malevolent yokai in Kekkaishi. The Kekkaishi and the Hogwarts students would then have to form an alliance to fight against this new, combined evil force. They could learn from each other's fighting styles and magical abilities.
Snape and Madarao would be an unexpected but fascinating pairing. Snape's brooding and complex personality could interact in an interesting way with Madarao's more straightforward and loyal nature. Snape could perhaps study the unique yokai magic associated with Madarao, and Madarao could be both amused and intrigued by Snape's potions and spells.
A great plot for a Potter Manor fanfiction could involve a mystery that surrounds the manor. For instance, strange noises at night lead Harry to uncover a long - forgotten chamber. It could also be about Harry restoring the manor to its former glory, perhaps with the help of Hermione's research on ancient magic used in the construction of such manors.
One interesting plot idea could be exploring what would happen if Harry had a different upbringing, like being raised by the Malfoys. It would completely change his view of the wizarding world and his relationships. Another idea might be a time - travel fanfic where Harry goes back to the Marauders' era and interacts with his parents and their friends. This could lead to him preventing certain tragedies or changing the future in unexpected ways. And then there's the concept of a fanfic where the roles are reversed, and Voldemort is the one trying to protect the wizarding world from a greater evil, with Harry being the main antagonist.
One idea could be Harry Potter using his wizard skills in a boxing ring in a unique way. For example, he might use a levitation charm to dodge punches or use a stunning spell on his opponent's gloves to make them heavier. Another could be a story where the wizarding world has its own boxing league and Harry has to compete against other magical beings like werewolves or giants in the ring.
An enchanter in a fanfiction could create a spell that allows them to communicate with portraits in a way that has never been done before. For example, they could get advice from portraits of long - dead headmasters on how to deal with the current political situation in the wizarding world. Another plot might be that an enchanter is able to enchant the Sorting Hat to sort students based on their future potential rather than their current characteristics. This could lead to some students being placed in houses that they never expected. And finally, an enchanter could be working on a spell to make the Hogwarts Express invisible during its journey, but things go wrong and the train starts to disappear and reappear at random intervals, causing panic among the students.
One idea could be that Amara is a new student at Hogwarts with a special power to communicate with magical creatures in a way no one else can. Harry discovers this and they team up to solve a mystery involving a group of sickly unicorns in the Forbidden Forest.
One idea could be a wedding between a wizard from Gryffindor and a witch from Slytherin, which could cause a stir among the Hogwarts alumni. They might have to overcome the old prejudices of their houses. Another could be a wedding set during a time of peace after the battle of Hogwarts, with characters like Harry and Ginny as guests, and the wedding could incorporate a lot of traditional wizarding wedding elements like flying doves made of light magic.
One idea could be that Lelouch, with his strategic mind, somehow gets transported to the Harry Potter world. He could use his Geass ability in a very different way, like influencing Death Eaters to turn against Voldemort. Another could be Harry Potter and Lelouch teaming up to fight a common enemy that has elements of both their worlds, perhaps a dark wizard who has also mastered some form of mind - control magic similar to Geass.
A plot could involve Belphegor disguising himself as a new teacher at Hogwarts. He starts to influence the students in a negative way, spreading laziness and chaos. Harry Potter senses something is wrong and with the help of Hermione's research and Ron's loyalty, they discover the true identity of the 'teacher' and try to stop his evil plans.
One idea could be that Belmont is a long - lost relative of Harry Potter who shows up at Hogwarts with some unique magical abilities that even the professors are in awe of. He could help Harry in his fight against Voldemort in unexpected ways.