In many such fanfics, Harry is often conflicted. He hates Voldemort for all the evil he has done, but at the same time, he has to deal with this possessive force. The relationship can also have moments of strange connection, where Voldemort might show a side of himself that only Harry gets to see, which adds a complex layer to their dynamic.
Often, it's portrayed as a very unbalanced power dynamic. Voldemort is the powerful, controlling figure, and Harry is the object of his possessiveness. For example, Voldemort might try to isolate Harry from his friends and allies.
Their relationship can be seen as a sort of twisted obsession. Voldemort views Harry as something that belongs to him, whether it's because of Harry's power or some other reason. In some fanfics, this leads to Voldemort constantly trying to dominate Harry in various ways, like mind games or physical threats.
Often, it can be portrayed as an unexpected and somewhat unorthodox relationship. Narcissa, being from a different background and generation, her possessiveness might stem from seeing Hermione's unique qualities. It could be shown as a sort of mentorship - like possessiveness, where Narcissa wants to guide Hermione in the ways of the wizarding world she knows.
One common theme is the power struggle. Voldemort's possessiveness often leads to a fight for control over Harry's power. Harry, on the other hand, resists this control, which creates a tense dynamic.
There's also 'Voldemort's Obsession'. In this fanfic, Voldemort's possessive nature is shown through his constant attempts to control Harry's every move. It's a rather dark take on their relationship, with a lot of psychological battles between the two characters.
The relationship between Harry and Snape is often complex. Snape may be shown as reluctantly helping Harry out of his love for Harry's mother. With Lucius, he is usually seen as a fellow Death Eater, but there can be power struggles. And with Voldemort, Snape is a servant but also has his own hidden agenda. Harry and Lucius are enemies, as Lucius is a pure - blood supremacist. Harry's relationship with Voldemort is one of mortal enemies, with Voldemort constantly trying to kill Harry.
Well, in such fanfiction, Voldemort's possessiveness might show through his constant attempts to control Harry's actions. He may try to isolate Harry from his friends and allies, wanting Harry all to himself in a very dark and twisted way. For example, he could use dark magic to keep Harry in a certain place or manipulate situations so that Harry has no choice but to be near him.
Their relationship can also be portrayed as a gradually evolving bond. Gaara starts off with a sense of possessiveness that is more about his own insecurities. As the story progresses, Naruto helps Gaara work through those insecurities, and the possessiveness transforms into a more healthy and mutual bond of friendship and loyalty. This is often shown through various adventures and challenges they face together in the fanfiction.
The relationship between them in fanfiction also affects their portrayals. If the fanfiction focuses on a timeline where Dumbledore and Voldemort were once friends or colleagues, their characters will be different from a story where they were always bitter enemies. Dumbledore might show more regret or a sense of failure if he couldn't prevent Voldemort from turning evil in such a scenario, and Voldemort might have a different level of respect or hatred for Dumbledore depending on their past interactions.
In such a fanfiction, Voldemort would view Harry as his possession. He'd order Harry around, thinking he can use Harry's wolf - like abilities for his own dark deeds. However, Harry would not go down without a fight. He'd constantly be trying to undermine Voldemort from within. Their relationship would be a very strange and twisted one. Harry would have to pretend to be loyal while actually hating Voldemort with every fiber of his being. And Voldemort, being so arrogant, might not realize how much of a threat Harry still is even in his wolf form until it's too late.
Well, in such a fanfiction, Harry being Voldemort's snake might initially make their relationship more of a master - servant one. But as the story progresses, Harry could start to resist Voldemort's control, leading to a more adversarial relationship.
It can be shown through Itachi's actions. For example, he might not allow other characters to get too close to Sakura. He could give warning looks or subtly use his power to keep others at bay.