Well, without reading the specific fanfiction, it's hard to say exactly who Harry is. But generally in fanfiction, Harry could be an original character added to the existing lore of The Lord of the Rings. He could be an Elf Lord with his own backstory, perhaps related to some of the well - known Elven families in Tolkien's world. He might be involved in the great battles or quests, bringing a new perspective to the familiar story.
One way is through his physical abilities. Elves in the Lord of the Rings are known for their agility and archery skills. So, Harry could be depicted as an excellent archer, using his elven - like precision to protect his friends in the fanfiction.
Perhaps Harry is a diplomat in the fanfiction. He uses his charm and wisdom to negotiate between different factions in Middle - earth, like the elves and the dwarves. He might be crucial in maintaining peace. Since he is an Elf Lord, he could also lead the elves in battles or in the protection of their lands.
One common theme is redemption. Often, the dark elf characters are given a chance to atone for past misdeeds or the actions of their race. For example, a dark elf might try to save Middle - earth from a great evil to make up for the wrongs their kind has done.
He could be a protector. Just like the elves in Lord of the Rings are often guardians of their realms, Harry could use his elf - like abilities to safeguard a particular place or group of people in the fanfiction.
One great 'Lord of the Rings' Dark Elf fanfiction is 'The Dark Elf's Quest'. It focuses on a dark elf's journey to find a lost artifact that could change the fate of Middle - earth. The author does a wonderful job of describing the dark elf's unique abilities and the challenges he faces.
Many fanfiction writers are attracted to dragons in these universes because they are such iconic and powerful creatures. In the context of combining Harry Potter and Lord of the Rings, a dragon could be a bridge between the two worlds, maybe a dragon that was once in Middle - earth but somehow ended up in the wizarding world of Harry Potter, creating all sorts of interesting storylines.
Maybe the female elf OC is a healer. She comes across a wounded character from the Lord of the Rings world. As she nurses him back to health, they start to bond. They then journey together to find a rare herb that can cure a deadly disease spreading in Middle - earth. Along the way, they face orcs and other perils, and their relationship deepens.
One idea could be a crossover where the characters from Harry Potter are transported to Middle - earth. For example, Harry could meet Aragorn and they could exchange knowledge about magic and leadership. Harry's magic could be a new and strange power in Middle - earth, and Aragorn's warrior skills and wisdom could inspire Harry.
Dragons in these fanfictions can also represent power. In Harry Potter, a dragon might be a symbol of the raw, unbridled power that wizards have to control. In Lord of the Rings, a dragon's power could be related to the balance of good and evil in Middle - earth. If a dragon is awakened, it could tip the scales in the wrong direction, or if it's tamed, it could be a great asset to the good side.