To make it unique, combine the quirk with existing Harry Potter lore in unexpected ways. For instance, if Harry's quirk is to sense dark magic from afar, you could have him detect a hidden dark object in the Forbidden Forest that even Dumbledore wasn't aware of. This would create a new plotline that twists the familiar Hogwarts setting.
One idea could be that Harry's quirk is the ability to communicate with magical creatures in a more profound way. This could lead to him uncovering secrets about Hogwarts' hidden areas where these creatures live. For example, he might discover a new breed of dragon that has been long forgotten.
Well, Harry could marry one of the veelas. Given their beauty and allure, it would add an interesting dynamic to the story. Their relationship could involve Harry having to deal with the jealousy of other wizards and also the cultural differences of the veelas. Or he could marry a descendant of one of the founders of Hogwarts. This would tie in a lot of Hogwarts history into their relationship, and their wedding could be a grand event that unites different factions within the wizarding community who have ties to the founders.
Maybe Dumbledore, if he were still alive in the fanfiction. Dumbledore was highly respected and had a great influence. Knighting Harry would be a way for him to publicly recognize Harry's achievements and heroism on a grand scale.
A well - liked fanfiction is 'Midoriya's Dual Quirks'. As the title suggests, he gets not one but two quirks. This makes for an interesting read as he has to balance using both and figure out how they interact. There's also 'The Forbidden Quirk' where Midoriya gets a quirk that is considered dangerous or taboo in the My Hero Academia universe. It creates a lot of conflict as he tries to keep it a secret while also using it for good. And 'Quirk of the Ancients' where his new quirk has roots in an ancient, long - forgotten power source, leading to a journey of discovery about the history of quirks.
Hermione Granger is a very common character. Since she is Harry's best friend, she would likely be there to help him understand and control his new superpowers. She might research in the library to find out how these powers came about and how to use them effectively. Ron Weasley is also common. He would probably be both in awe and a bit jealous of Harry's new powers at first but would still support him in the end.
It could be Voldemort. He might use hypnosis as a new way to get to Harry, trying to make him a weapon against the Order of the Phoenix. Another possibility is a new dark wizard who wants to make a name for himself by controlling Harry Potter.
It could be Dumbledore. Dumbledore is always full of surprises and he might give Harry the staff as a last - resort weapon to fight against Voldemort. He could have been secretly researching the staff and its powers and decided that Harry was the only one who could wield it properly.
No. Fanfiction that involves such inappropriate and sexual content is not acceptable in the Harry Potter fandom. The Harry Potter series is mainly aimed at a wide range of audiences including children and young adults, and this kind of content goes against the spirit of the original work which is about magic, friendship, and heroism.