There could be fanfictions where Draco, as Harry's pet, becomes a source of mystery. For instance, Draco might be a magical creature in pet form that has some hidden powers or a connection to an ancient magic. Harry has to figure out what's going on while also dealing with Draco's prickly personality. This could lead to adventures where they have to rely on each other in unexpected ways. Harry might learn to understand Draco's needs and desires better, and Draco might start to appreciate Harry's care.
Well, if Draco is Harry's pet in fanfiction, their relationship could be one of reluctant companionship. Maybe Draco was turned into a pet as a form of punishment. Harry, being the kind - hearted person he is, takes care of him. But Draco still has his pride and tries to boss Harry around in his own way, like demanding the finest treats or the comfiest place to sleep.
He could be creating a dedicated folder on his computer for all his favorite fanfiction stories, which is a simple way of 'nesting'.
Well, the relationship might be complex. Narcissa could see Hermione as a unique asset, like an intelligent pet that she can show off or use to her advantage in some way. And Hermione might be in a position where she has to play along to survive or gain something. For example, Narcissa could be using Hermione's knowledge to further the interests of the pure - blood families, while Hermione is trying to figure out how to turn the situation to her own benefit.
Typically, these fanfictions show Draco and Harry's relationship as a journey. They begin with their differences, but the act of adoption brings them closer. They might argue at first about how to raise the child, but gradually they find common ground. Their relationship is also portrayed as one of growth. Draco may become more open - minded and less prejudiced, while Harry becomes more patient. And through it all, their love for the child and each other is what holds them together.
Maybe Harry is a hybrid of a mermaid and a wizard. Then we could see him having the ability to breathe underwater and communicate with sea creatures. He might use this to his advantage in a quest that involves something hidden in the depths of the Black Lake at Hogwarts. He could also face discrimination from some wizards who see his mermaid side as something abnormal.
One way could be that the dialogue of some characters is in one language, say English, while the descriptions or internal thoughts are in another language like German. For example, Harry might be speaking English when interacting with his friends, but when we get a peek into his deeper thoughts about his past or his feelings towards Voldemort, it could be in German.
In this kind of fanfiction, we could see Ron being able to use psychometric magic to understand the history of the Weasley family heirlooms. Maybe he touches an old broomstick and gets visions of all the Weasley siblings who have used it before. Also, Dumbledore could have known about a psychometric spell and used it to study the history of Hogwarts itself, finding out secrets about the founders by touching objects they left behind.
One example could be a story where a human has the ability to purr like a cat when they are content. Another might be a story about a group of humans who live in a society modeled after a beehive, with a queen - like figure and different 'worker' humans, similar to how bees operate in a colony. There could also be a story where a human has a dog - like sense of smell and uses it to solve mysteries.
One example could be a fanfiction where Harry uses his invisibility cloak in a more devious way to play pranks on the Slytherins, rather than just for sneaking around. Another might be if Ron uses his chess skills not just for playing the game but to outwit his enemies in a more strategic and underhanded way.
Often, in these fanfictions, their relationship is full of challenges. Their different backgrounds - Hermione being a Muggle - born and Draco from a pure - blood family - cause friction. However, their love overcomes these obstacles. Hermione might help Draco to better understand the value of equality in the wizarding world, and in turn, Draco can introduce Hermione to some of the more traditional aspects of wizarding society in a new light.
Maybe there could be a situation where Harry has a magical tube plugged into him that gives him special powers. For example, it could be a tube that channels ancient magic and he has to learn to control the power flowing through it.