There's 'Forgotten No More'. In this fanfiction, the forgotten daughter has unique powers that set her apart. As she enters the Mikaelson world, she faces both acceptance and rejection from different family members. It shows how she overcomes the challenges of being an outsider in her own family and forges her own path, with Klaus having a particularly difficult time coming to terms with her existence at first.
They're popular because they add a new dimension to the already rich Vampire Diaries and The Originals universe. People love exploring the idea of a hidden family member and the drama that comes with it.
Well, 'Klaus Mikaelson: The Untold Stories' is a really good fanfiction. It adds new layers to Klaus's backstory, filling in some gaps that the original show might have left. Then there's 'In the World of Klaus' which is set in an alternate universe where Klaus has different challenges and relationships. It's fascinating to see how his character adapts. Also, 'The Enigma of Klaus' is great as it focuses on Klaus's inner thoughts and how he perceives the world around him.
One common theme is the struggle between Klaus's dark nature and the purity of love. His vampiric and often cruel side is in contrast to the love he feels for the female lead. Another theme is the idea of redemption through love. The love of the woman in the story can make Klaus want to be a better person, or at least show his softer side. Also, the theme of loyalty often comes up. Klaus is a powerful and dangerous being, but his love for the protagonist makes him loyal to her, and she is loyal to him in return, despite all the challenges they face from his enemies and his own family's complex dynamics.
One common theme is the struggle for acceptance. The OC daughter often has to deal with Klaus's complex personality and the whole vampire - werewolf - witch world she's born into. Another theme is family loyalty. Despite the challenges, she usually shows great loyalty to Klaus and the rest of the Mikaelson family.
There could be a fanfiction where Bella, after the events in her own series, somehow ends up in the world of Klaus Mikaelson. She might initially be scared, but her strong will makes her stand up to Klaus. And as time passes, they start to see each other in a different light. Maybe she helps him deal with his family issues, while he protects her from the new threats in his world.
One common plot twist is that she discovers she has some latent supernatural powers after all, despite being human. This could be due to some long - forgotten magic in the Mikaelson bloodline. For example, she might suddenly be able to see the future or communicate with spirits, which completely changes her role in the story and how others perceive her.
She is sometimes shown as a very strong - willed individual. Since she is human in a family of vampires and other supernatural creatures, she has to be tough. Fanfictions may portray her as using her wits to survive. Maybe she becomes friends with some of the other characters in Klaus' world who help protect her. For instance, she could form a bond with Elijah, Klaus' brother, who sees her as a symbol of hope for Klaus to become more human - like in his actions and emotions.
One popular klaus mikaelson fanfiction is 'The Hybrid's Redemption'. It explores Klaus's journey towards finding a new purpose. Another one could be 'Klaus and the New World' which delves into his experiences in a modern - day setting that he has to adapt to. And there's also 'Love in the Mikaelson Mansion' that focuses on his relationships within the family and with a new love interest.
Another great fanfiction is 'Shared Secrets'. The male oc has a mysterious past that Klaus is intrigued by. As they get closer, they discover secrets about each other that change their relationship dynamic. It's a story that balances mystery and romance really well.
The relationship between Klaus and the OC wife needs to be believable. It should progress gradually, starting from initial attraction to deeper love. In a great fanfic I read, they first met as enemies but then slowly realized they had a connection. Also, a good plot that involves the supernatural elements of the show, like vampire politics or witchcraft, can make the fanfiction really exciting. The fanfic can show how the OC wife fits into this world and how she and Klaus navigate through it together.