One possibility is that they meet in a very secluded way. Maybe the OC is a new student who has been hiding some special magical ability. Harry is drawn to her uniqueness and they start to secretly meet in the Forbidden Forest. As their relationship grows, they keep it a secret from everyone, including their friends, because they fear how others will react to Harry marrying someone not from the well - known wizarding families.
The plot could involve the OC being from a different magical culture. For example, she could be from a far - off land where the magic is different. Harry meets her during one of his travels for the Order of the Phoenix. They fall in love quickly but decide to keep it secret as they know the wizarding world in Britain might not accept their union easily. They get married in a small, private ceremony in the OC's homeland.
Perhaps the OC is a muggle - born who has some prophetic dreams. She dreams about Harry and his future role in the wizarding world. They meet when she comes to Hogwarts to learn more about her magic. Harry is intrigued by her knowledge and her dreams. They secretly marry because they don't want Voldemort or his followers to use their relationship against them in the ongoing war.
The OC could be a brilliant witch who has a special talent for ancient magic. This makes her fit into the wizarding world as she can contribute to the study and understanding of magic at Hogwarts. For example, she might be able to unlock secrets in the Restricted Section that no one else could. Since she marries Harry secretly, she has to be careful about how she uses her abilities so as not to draw too much attention.
The plot might be that Harry has always had a strange attraction to the Black Lake where the mermaids live. One day, he has a dream about a mermaid who gives him a clue about his past or his future in the fight against evil. So, he starts to secretly learn about mermaid culture and language to understand the message better. As he delves deeper, he uncovers a conspiracy in the wizarding world that involves the mermaids and he has to decide whether to trust them or not.
Well, perhaps in this fanfiction, Harry could be secretly trained by an ancient and powerful wizard who has been in hiding. This wizard might teach Harry some long - lost magic spells and combat techniques that are far more advanced than what he learned at Hogwarts. It could also involve Harry having to keep this training a secret from his friends and teachers, adding an element of mystery to the story.
Maybe Harry has been secretly blind all along but has been using magic to hide it from others. He could have developed a special magical ability that compensates for his blindness, like a super - sensitive sense of hearing through magic that helps him detect danger and navigate Hogwarts.
A 'Harry Potter marries Supergirl' fanfiction might start with Supergirl accidentally landing in the wizarding world. Harry Potter, being the curious and brave wizard he is, approaches her. At first, there are misunderstandings due to their different cultures and powers. But as they start to communicate and learn about each other's worlds, they realize they have a lot in common. They both fight for the good of their respective worlds. This mutual understanding leads to a deep friendship and later, love. Their marriage would be a grand event, attended by wizards, witches, superheroes, and supervillains (the ones who are allowed to come under a truce). It would symbolize the coming together of two very different yet equally amazing fictional universes.
One possible plot could be that after the war, Harry realizes his deep connection with Tonks as they both have lost loved ones and are trying to rebuild their lives. They start to spend more time together, and gradually their friendship turns into love. Eventually, they get married and face the challenges of the post - war wizarding world together.
One possibility could be that in an alternate magical universe, Harry Potter, after all his adventures at Hogwarts and defeating Voldemort, travels to a different realm where he meets a queen. Maybe the queen is facing some magical threats in her kingdom and Harry, with his powerful magic, offers to help. As they work together, they fall in love and decide to get married. Their union could then bring about a new era of peace and cooperation between the wizarding world and the queen's non - magical kingdom.
In the 'Harry Potter marries Blackfire' fanfiction, it could start with Harry being sent on a diplomatic mission to Blackfire's homeland. There, he meets her and is immediately drawn to her strength and intelligence. Blackfire, on the other hand, is initially skeptical of Harry but soon sees his true character. As they work together on some magical problem or task in her land, their relationship grows. Their marriage could then be a symbol of unity between the Hogwarts - associated wizarding world and Blackfire's people. It would also bring about changes in how wizards view different cultures and relationships, as Harry and Blackfire would strive to bridge the gaps between their two worlds.
Perhaps there's a prophecy that involves both of them. They are forced to work together to figure out what it means. Along the way, they discover they have a deep connection, not just because of the prophecy but also because of their shared values of courage and loyalty. This connection eventually leads to marriage.
In the fanfiction, it could start with Harry feeling a strange pull towards an ancient magic site. There he meets Hecate. Hecate is intrigued by Harry's unique magic, which has survived so many dark encounters. They begin to collaborate on magical research, and during this process, their relationship deepens into love. Their marriage unites the Hogwarts magic that Harry grew up with and the primordial magic of Hecate. This causes a stir in the wizarding world as many are both excited and fearful of the new power dynamics that will surely follow.