Maybe the house elves train Harry in the art of stealth. Since they are so good at moving around unnoticed in the wizarding world. They could pass on those skills to Harry, which would help him greatly in his battles against Voldemort and his Death Eaters. Harry could then use this new - found stealth to gather intelligence or surprise his enemies.
Perhaps some of the pure - blood wizard families who look down on house elves training a wizard like Harry could be antagonists. They might see it as a threat to the traditional wizarding hierarchy and try to stop Harry and the house elves, thinking that it's not proper for a wizard of Harry's status to be trained by 'mere' house elves.
Dobby would likely be one of the important house elves. He has shown great courage and a willingness to go against the norm to help Harry in the original series. In this fanfiction, he could be the leader among the house elves in the rescue mission.
Dobby is often very popular in fanfiction. Since he was already a well - developed character in the original series, fanfiction writers like to expand on his story further. He might be shown having more adventures or getting into different kinds of trouble. Another popular one is Kreacher. Writers may explore his complex personality more deeply, perhaps showing a side of him that was not fully explored in the books, like his loyalty to the Black family in new and interesting ways.
In a fanfiction where Harry Potter is trained by elves, it could lead to some interesting character developments. He might become more empathetic towards the elves' situation in the wizarding world. The training could involve a lot of physical and mental challenges that would make him stronger. For example, elves are known for their patience and discipline, and Harry could pick up these qualities. This would not only change his relationship with other characters like Hermione and Ron, but also his standing in the fight against Voldemort. He could use the skills and knowledge he gained from the elves to come up with new strategies and perhaps even find some weaknesses in Voldemort's magic that he wouldn't have noticed otherwise.
The story could change a great deal. His power level might increase significantly. Since elves have their own form of magic, Harry could combine it with his existing wizarding magic. This could make him a more formidable opponent against his enemies. For instance, he might be able to use elf - like stealth in battles.
Dobby is often very popular in fanfiction. Since he was already a rather unique and brave house - elf in the original series, in fanfiction he can be portrayed in even more heroic or complex ways, like leading a revolution among house - elves.
There is also Kreacher. He serves the Black family and later has an important role at Hogwarts. He has a rather surly and complex personality. He is very loyal to the Black family, but also has to adapt to new situations after Sirius's death. His actions are often influenced by his long - held family traditions and grudges.
Dobby would be a very likely candidate. He was already a prominent house elf in the original series and had a strong connection with Harry Potter. His brave and rebellious nature would make for great stories in a fanfiction where Harry is involved as a house elf too. Maybe they could have more adventures together, this time with Harry sharing Dobby's experiences.
Dobby is definitely one of the most popular. His character from the original books was so endearing and his actions so brave that he often features prominently in fanfiction. Another popular one is Kreacher. His complex relationship with the Black family and his growth as a character make him a great subject for fanfiction writers.