Perhaps Harry and Dobby bond over a shared love for a particular kind of magic, like house - elf magic. Dobby could teach Harry some unique spells or magical tricks that only house - elves know, which is really exciting in the story.
One great story could be 'A Bond Beyond Magic' where Harry and Dobby's relationship deepens as they face a new dark threat together. Dobby uses his unique house - elf magic to help Harry in ways that no one else can.
At first, Harry might be a bit annoyed by Dobby's antics. But as the story progresses in the fanfiction, he could notice Dobby's good intentions. Dobby's eagerness to serve and protect Harry could touch Harry's heart. Maybe Dobby saves Harry from a particularly dangerous situation that makes Harry see Dobby in a whole new light. Harry then starts to admire Dobby's tenacity. He may also be intrigued by Dobby's strange habits, like his obsession with odd - looking socks. This new - found admiration could lead to Harry becoming a big fan of Dobby.
In such a fanfiction, it could lead to Harry having a more loyal and protective companion. Dobby's magic and determination might aid Harry in unexpected ways.
In fanfiction, when Harry befriends Dobby, it shows Harry's kindness. Harry doesn't see Dobby as just a house - elf, but as an equal. This friendship can also lead to unique storylines. For example, Dobby might use his knowledge of the Malfoy family to help Harry against Voldemort.
The 'bonds of matrimony' can also be a way to explore the characters' growth. In a fanfiction setting, we might see how characters like Harry or Hermione develop in a married state. They could face new challenges together, and the bond might be tested by things like dark magic threats or political unrest in the wizarding world.
His loyalty to Harry could intensify. Knowing that Harry is his owner in this fanfiction, Dobby would likely double down on his efforts to protect Harry. This could lead to him making sacrifices he wouldn't have considered before. He might even put himself in more dangerous situations to ensure Harry's safety.
One common theme is loyalty. Dobby is extremely loyal to Harry, and this is often explored in fanfiction, like how he's willing to risk his life for Harry. Another theme is freedom. Since Dobby was a slave elf and then became free, stories may focus on how he enjoys his new - found freedom and how it affects his relationship with Harry.
One idea could be a story where Rose, who might be a new student at Hogwarts, befriends Dobby. Harry Potter could then play a role as a mentor to Rose, guiding her through the magical world. Dobby could use his unique magic skills to help Rose in various tasks around the school, like finding hidden passages.
In some fanfiction, Dobby helps Harry Potter by using his house - elf magic in unique ways. For example, he might create secret passages for Harry to escape danger. Dobby's loyalty drives him to do whatever it takes to keep Harry safe, like magically disguising Harry so his enemies can't find him.