In fanfiction, their relationship could be developed through a shared magical discovery. Suppose they both stumble upon an ancient, powerful dark magic that neither can control alone. They are forced to work together to master it. As they do, they learn about each other's pasts, their motives for being evil, and gradually start to respect and rely on each other.
They could start as enemies. The Evil Queen might see Maleficent as a threat to her own reign of evil. But over time, they could find common ground in their hatred for the 'good' characters in their respective stories. For instance, Maleficent's hatred for Aurora and the Evil Queen's envy of Snow White could bring them together as they plot against these princesses.
Another way is through a power struggle. At first, they might constantly try to outdo each other in terms of the darkness of their magic or the scale of their evil deeds. However, as they realize that this is causing more problems for them (like attracting unwanted attention from heroes), they decide to work together in a more coordinated way, and this leads to a more complex and interesting relationship development.
A fanfiction could explore a scenario where the Evil Queen is in trouble and Maleficent comes to her rescue. After that, the Evil Queen feels indebted to Maleficent. So she offers to help Maleficent in her quest for revenge against Sleeping Beauty. They then embark on a journey together, facing many obstacles along the way, and in the process, their relationship deepens.
In the fanfiction, their relationship could develop through a series of shared adventures. For example, they might be forced to team up against a greater evil, like an ancient dark force that threatens their kingdom. During this time, they start to understand each other better.
Another way is through magic lessons. Maleficent could teach Aurora some basic magic skills, not just for self - defense but also as a form of art. This would create a new level of connection between them as Aurora becomes more involved in Maleficent's world of magic, and Maleficent gets to see Aurora grow and learn.
The relationship could start with Ino being curious about Naruto's sudden change to evil. She might try to reach out to him, thinking she can change him back. This initial interaction can set the stage for a complex relationship.
In fanfiction, they could also be brought together by a third party. Maybe a young changeling who wants peace between the two races tricks them into meeting in a neutral place. At first, they are both angry but as they talk more, they start to see the possibility of cooperation. This could be the start of a complex relationship where they learn to respect each other's differences.
By putting them in situations where they have to rely on each other. For example, if they are trapped in a dangerous dimension. This would force them to interact and potentially grow closer.
The possessive relationship could start with Itachi saving Sakura from a dangerous situation. After that, he feels a sense of ownership over her safety. For example, he starts to follow her around discreetly. Sakura might notice this and be a bit annoyed at first but also a little flattered.
Their relationship could start with mutual mistrust. Inuyasha might be skeptical of Female Shippo's motives or abilities at first. But as they face common enemies together, they begin to respect each other. For example, if they team up to fight a demon that is causing chaos in a village, they see how each other fights and starts to rely on one another.
Another way is through a prophecy. In the fanfiction, there could be a prophecy that only Naruto and female Madara together can save the shinobi world from a great disaster. At first, they don't believe it, but as the signs of the disaster start to appear, they are forced to work together. As they spend time together trying to prevent the disaster, they learn about each other's pasts, hopes, and dreams, which leads to a deep emotional connection.
In fanfiction, Tsunami might have a special ability that can soothe the Kyuubi's wild nature. Naruto, being the host of the Kyuubi, is amazed by this. They start to work together, with Tsunami using her ability regularly on the Kyuubi. This leads to a more harmonious relationship between Naruto and the Kyuubi, and also a deep friendship between Tsunami and both Naruto and the Kyuubi as they rely on each other more and more.