Well, a house - elf army in Harry Potter fanfiction might have a complex hierarchy. The older and more experienced elves could lead the younger ones. They would likely be armed with their own unique brand of magic. Maybe they'd use their magic to create defensive barriers around places they protect. Also, their small size could be an advantage in sneaking around and gathering intelligence.
In fanfiction, a Harry Potter house - elf army could be very powerful. They are known for their loyalty and magical abilities, especially in domestic magic. They could use their skills to protect Hogwarts or support a particular side in a wizarding conflict. For example, they might use their ability to apparate within the castle to quickly move around and surprise enemies.
A Harry Potter house - elf army in fanfiction could be a game - changer. House - elves are not to be underestimated. They have strong magic that is often overlooked. Their army could be highly organized, with different tasks assigned to different elves. Some might be in charge of healing, using their magic to mend wounds. Others could be combat - oriented, using their agility and magic to take on opponents. They could also have a code of honor among themselves, which would shape how they operate in the fanfiction world.
Perhaps it could start with a charismatic leader among the house - elves. One elf with a strong vision could inspire others to join. They might gather in secret at first, training in the hidden corners of Hogwarts or other wizarding estates.
The house elf might be very grateful. Harry is known for his kindness, so the elf could see this as a chance for a better life. It might immediately start serving Harry with great enthusiasm, believing that Harry will be a fair and good master.
There could be many possibilities. It might be an original character created specifically for the fanfiction. However, it could also be a well - known house - elf from the original series, like Dobby, who in the fanfiction somehow comes to be owned by Harry Potter in a different set of circumstances. Maybe Harry saves Dobby in a more complex way in this fanfiction and as a result, Dobby becomes his house - elf.
Well, perhaps the house - elf is constantly tidying up in really cool ways. It could be folding clothes by magic so that they are always perfectly creased, or it might arrange the books in Harry's library in a way that makes it easier for him to find the exact spell book he needs at any given time. And it could also have a special connection with the other magical creatures around the house, like communicating with the garden gnomes and getting them to stay in line without causing trouble.
His personality would be significantly different. Since house - elves have a very different culture from wizards, Harry would grow up with different values. He could be more empathetic towards the underprivileged in the wizarding world, like the house - elves themselves. He might also be less concerned with the pure - blood/muggle - born divide, as house - elves don't really care about such things. Additionally, he would have a strong sense of duty towards those he considers family, which in this case would be the house - elf that raised him. This sense of family and loyalty would be a core part of his personality.
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.
One interesting plot could be Harry Potter discovers he has a special connection with the house elves. Maybe he can understand their language without using a spell. So he teams up with a group of house elves to uncover a secret that's been hidden in Hogwarts for centuries, like a hidden chamber that holds the key to a powerful magic that can save the wizarding world from a new dark threat.
One interesting fanfiction could be about a house - elf who gains magical powers beyond what is normal for his kind. This could lead to all sorts of adventures where he has to use these powers to protect Hogwarts from a new, unknown threat.
If Harry becomes a house - elf, his character would develop in a way that he becomes more resourceful within the constraints of a house - elf's life. He would have to use his wits to get things done because house - elves have limited magic compared to wizards. Also, his sense of justice would be even stronger. He would be constantly looking for ways to break the chains of the traditional house - elf servitude, maybe by finding loopholes in the ancient laws that bind them.
One possible plot could be that Harry discovers an elf with extraordinary powers and a kind heart. As they interact more, he realizes his deep connection with her. They might face opposition from the wizarding society as inter - species relationships are not common. But through their love and determination, they prove that their relationship is valid and change the views of some in the wizarding world.