Another storyline could be Dobby getting involved in the Triwizard Tournament. He could be secretly assisting Harry throughout the tasks, using his knowledge of the castle's secrets. Since Dobby has spent a lot of time in Hogwarts, he might know shortcuts or hidden passages that could give Harry an edge in the tournament, without breaking the rules too much.
In some fanfictions, Dobby might form an unlikely friendship with other Hogwarts students. He could teach them about house - elf magic, which is something not really covered in the original books. For instance, Dobby could show them how to use his brand of household magic for protection spells around the school during the dangerous times when Death Eaters are on the prowl.
One interesting theme is Dobby's search for freedom and identity. Since he was a house - elf, his journey to become more than just a servant is a great theme. Another could be his friendship with Harry Potter and how it evolves over time.
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 interesting plot point could be how Harry's ownership of Dobby changes their relationship dynamic. Maybe Dobby becomes even more protective of Harry, going to extreme lengths to keep him safe. For example, he might use his unique house - elf magic in new and creative ways to defend Harry from dark forces.
In some fanfictions, Dobby uses his unique magic skills to create elaborate pranks against Harry's enemies at Hogwarts, which adds a lot of humor to the story.
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.
Dobby sometimes helps Harry Potter in fanfiction by summoning other magical creatures to assist. For example, he could call upon friendly centaurs or house - elves from other families who are sympathetic to Harry's cause. This creates a sort of magical alliance around Harry, which is really cool. Dobby's social network among the magical beings is something that is often explored in interesting ways in fanfiction.
The most interesting aspect is the unique combination. Dobby is such an iconic and loveable character, and adding lemons into the mix creates a really strange yet fascinating concept. It can lead to all sorts of creative scenarios like Dobby using lemons in his magic, or having some sort of lemon - related quest.
A great Harry Dobby fanfiction could be set during the holidays. Dobby, who has a soft spot for Harry, tries to make Harry's Christmas at Hogwarts special. He decorates the Gryffindor common room with magical ornaments and cooks delicious magical treats for Harry and his friends.
One interesting Harry and Dobby fanfiction could be where Dobby uses his magic in creative ways to protect Harry from unexpected threats at Hogwarts. For example, he might create elaborate magical traps around Harry's dormitory to keep out dark wizards' spies.
One interesting Dobby - Harry fanfiction could be about Dobby helping Harry in a secret mission outside of Hogwarts. Dobby's unique magic and loyalty to Harry would make for an exciting adventure.