In the 'Harry Potter makes a clone army fanfiction', perhaps Harry creates the clone army to protect Hogwarts. He might use some ancient magic spells he discovers in the library. These clones could be modeled after the greatest wizards in history, like Merlin. They would bring a whole new level of defense to the school against the dark forces.
Definitely Hermione. Her intelligence and vast knowledge of magic would be a great asset if cloned. She could help solve complex magical problems and come up with strategies in battles.
He could have found a magical artifact. There are many artifacts in the Harry Potter world that have strange and powerful abilities. It could be that this artifact has the power to create clones. He figures out how to use it, perhaps with the help of Hermione who is good at researching such things. And then he starts creating his clone army.
It could also change his relationships. His friends might be worried about this new and rather extreme power he has. They might question his motives and whether this is the right way to deal with the problems in the wizarding world. On the other hand, his enemies would definitely be more cautious around him.
In fanfiction, if Harry Potter joins the army, he'd likely bring his magical skills. He could use spells for things like reconnaissance, making invisible barriers for protection, or even using the Patronus charm to boost morale. His experience fighting Voldemort would give him an edge in combat situations, and his leadership skills developed during his Hogwarts years would make him a valuable asset in military strategy and inspiring his comrades.
In a fanfiction where Harry Potter leads an army, he would need to be a great leader. He'd have to inspire his troops, which would include people like Hermione and Ron. They could use their knowledge of magic and friendship to hold the army together. The army could also include some unexpected allies, like the giants or the centaurs. This would change the power dynamics in the wizarding world and could lead to a quicker end to the war against Voldemort.
One possible outcome could be that Harry gains some extraordinary power. For example, the demon might give him the ability to defeat Voldemort once and for all in a very unique way. But this power would likely come at a cost, like sacrificing some of his relationships or his own moral integrity.
Maybe Harry Potter could be magically transported to the Star Wars universe and become a Clone Trooper. He might use his magic skills to help the Clone Troopers in their battles, like using spells to deflect blaster fire or heal wounded troopers.
The originality of the story. Harry Potter has a unique plot that follows Harry's growth and his battle against Voldemort. This is not a recycled or cloned idea.
Obviously, his friends Ron and Hermione would be among the first to join. Neville could also be a key member, as he has shown great courage. Then there might be the members of Dumbledore's Army who are still at Hogwarts. The Weasley twins could also be part of it, using their unique magical inventions to give the army an edge in battle.
Well, it could be about a new threat emerging in the wizarding world where a droid army is created by a dark wizard who has mastered both magic and Muggle technology. Harry and his friends have to figure out how to defeat this army using their own magic skills and knowledge of the wizarding world.