Yes, there are likely fanfictions out there that combine elements of Harry Potter and the Battle of Helms Deep. Fanfiction writers often like to mash up different fictional universes. You can start by looking on popular fanfiction websites like FanFiction.net or Archive of Our Own.
An interesting plot might involve a prophecy that links the fate of both worlds. The prophecy states that only by combining the power of the Elder Wand and the sword of Aragorn at Helms Deep can the ultimate evil be defeated. Harry, along with Hermione and Ron, journey to Middle - earth. They face many challenges on the way. At Helms Deep, they have to work together with the people there. Harry uses his magic to enhance the strength of the defenders, while the others from Middle - earth contribute their combat skills. There could be a sub - plot where some of the characters from both worlds develop romantic interests in each other, adding an extra layer of complexity to the story.
I'm not entirely sure which specific 'true story' about Ed Helms you're referring to. He has a career in comedy, with his work on shows like 'The Office' and in movies. Maybe his true story could be about his journey from starting in improv comedy to becoming a well - known actor.
There might be a young and adventurous elf who becomes Harry's friend. This elf could be named something like Lyra. She could show Harry all the secret places in the elven territory and introduce him to other elves. There could also be a powerful elf leader, perhaps named Thranduil, who at first is suspicious of Harry but later comes to respect him.
Winky is also a popular choice. Fanfiction might focus on her recovery from her problems in the original series, like her addiction to Butterbeer. Maybe she becomes a strong advocate for elf rights in these stories.
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 the first novel of the Lord of the Rings, the Silvan Elves (Wood Elves) were described as follows:
Sylvan Elves were small and delicate creatures. They usually wore green clothes, had two red ears, and a long beard. Silvan Elves are very intelligent, skilled in making all kinds of weapons and tools, and very brave. They will go forward bravely against any threat.
In the novel, when the hobbits and other dwarves were in trouble, the Sylvan elves would usually help them. They also often appeared in the game to provide players with various help and strategies.