One possible plot for this fanfic is that the Dark Lady has a secret past connection with Harry Potter's family. When Harry discovers this connection, he becomes curious about her. As he delves deeper, he is exposed to her alluring but dangerous world. He might be tempted to embrace her ways as he sees some perceived 'truths' in her actions and beliefs. This would lead to a major internal conflict within Harry as he struggles between his old values and the new, darker allure.
The Dark Lady could be Bellatrix Lestrange. She is a powerful and fanatically loyal Death Eater. If Harry Potter were to become a fan of her in a fanfic, it might be because he is somehow tricked into seeing her as a symbol of power and freedom from the traditional wizarding rules.
The Dark Lady could be an ancient witch who was once a powerful figure but was banished for her dark practices. Maybe she was a rival of one of the great wizards in the past and now she's back to seek revenge.
It could be an original character created by the fanfiction writer. A witch who has been in the shadows for a long time, biding her time to rise to power.
Well, in many 'Harry Potter and the Dark Lady' fanfictions, the plot often revolves around a new character, the Dark Lady. She could be an ancient evil that has been dormant for centuries and now resurfaces in the wizarding world. This might lead to Harry and his friends having to face new and unexpected challenges that are different from what they faced with Voldemort. Maybe she has her own dark magic and a group of followers who are causing chaos in Hogwarts and the wider wizarding community.
Well, 'His Dark Lady' in a Harry Potter fanfic might be a character that the author has invented to add a new twist to the story. It could be related to the existing themes of good and evil in the Potterverse. For example, she could be a love interest for one of the main characters, but with a dark side that causes conflict. This could lead to all sorts of interesting plot developments, like moral dilemmas for the other characters or changes in the power dynamics within Hogwarts.
Well, perhaps there's a prophecy in both the wizarding world and Asgard that involves a person from each realm. Harry Potter and Lady Sif are chosen. They have to journey together, learning about each other's cultures and magics along the way, all while trying to fulfill the prophecy which might involve saving both their worlds from a great evil.
Well, one possible plot development could be that Harry starts to question the existing power structures in the wizarding world. Maybe he feels that the so - called good side has its own flaws and secrets. He might then begin to amass his own power, secretly at first, perhaps by seeking out dark magic spells that have been long forgotten. He could start to gather followers who are also disillusioned with the status quo.
In such a fanfic, perhaps Harry Potter is magically manipulated. The Dark Lord could use some powerful dark magic to cloud Harry's judgment. Harry might then start to use his skills and knowledge, which were originally meant for good, to help the Dark Lord's evil plans. For example, he could use his Parseltongue ability to communicate with dark creatures for the Dark Lord's purposes.
Well, perhaps the plot could involve Harry discovering his new half - demon nature after some strange encounter. Maybe he starts to have new powers like enhanced strength or the ability to sense magic in a different way. He could struggle with his identity, being both a wizard and a half - demon. His friends at Hogwarts might be initially shocked but then help him understand and control his new powers.
His old friends, especially Hermione and Ron. They have always been on the side of good and would not stand for Harry becoming a dark lord. They would try to stop him and bring him back to the light, so they would be the main antagonists from Harry's new perspective.