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.
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.
Perhaps Dobby uses his magic in a creative and unexpected way to get Harry out of a tight spot. This display of resourcefulness could make Harry admire him. Also, if Dobby were to share some of his personal stories about the hardships of being a house - elf, it could make Harry respect him more and become a fan. For example, Dobby's tales of how he was treated poorly by his former masters but still remained kind - hearted could be a turning point.
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.
Well, Dobby's story of getting a sock to become free is really great. He tricked Lucius Malfoy into giving him a sock which set him free. And then he was able to be his own self and work at Hogwarts. For Winky, her loyalty to the Crouch family, even when they were not treating her well, and how she ended up at Hogwarts after the Triwizard Tournament fiasco is a memorable part of her story.
One common theme is freedom. Since Dobby was a house - elf who fought for his freedom, many fanfictions explore his new life after being freed. Another theme is loyalty. Dobby was extremely loyal to Harry, and this loyalty is often depicted in different situations in fanfictions. Friendship is also a big theme, especially his relationship with Harry and other characters like Hermione and Ron.
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.
There's also 'Harry Potter and Dobby: The Unlikely Alliance'. This one focuses on how Harry and Dobby team up against some dark forces that are trying to infiltrate Hogwarts. It's full of action and really showcases Dobby's bravery.
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.
Dobby becomes more confident. Instead of being a meek house - elf, he has to take on the role of a caregiver. So he has to be more assertive in making decisions for Harry. For example, when it comes to protecting Harry from potential threats, he won't hesitate like he used to.