Harry Potter is often still a central character. He might be the one leading the charge in creating this empire, using his fame and skills. Hermione Granger would also be important, probably coming up with the intellectual plans for expansion and development. Ron Weasley could be by their side, providing support and his own unique brand of humor and loyalty.
In 'Harry Potter Creates an Empire' fanfiction, the concept of magical diplomacy is quite interesting. The wizards have to deal with not only Muggles but also other magical creatures on a much larger scale. They might form alliances with centaurs or merpeople in a more official way. And the development of a new form of magical government that is more inclusive of all magical beings is also a fascinating concept that often appears in such fanfictions.
One idea could be that Harry creates a school for magical creatures. He realizes that there are so many unique and often misunderstood creatures in the wizarding world, and he wants to give them a place to learn and grow. This school could teach them how to interact with wizards in a positive way, as well as develop their own magical abilities.
One of the best 'empires' in Harry Potter fanfiction could be the wizarding empires that some writers create, which often expand on the existing magical world. For example, an empire where pure - blood wizards have absolute rule and they have a complex hierarchy and set of laws that differ from the Hogwarts - centric world we know. This can lead to interesting power struggles and moral dilemmas for the characters.
One idea could be that Harry discovers an ancient spell book in the Room of Requirement that has the incantations for creating a magic railgun. He might use it to defend Hogwarts against a new, powerful dark force that is immune to traditional magic spells.
In this fanfiction, Harry might also include some of the Hogwarts ghosts in his army. After all, they have a long - standing relationship with the school. Peeves, for example, could be a wild card in the army. He can cause chaos among the enemies. And some of the older students who have a strong sense of justice, like Cedric Diggory's friends, could also be part of it.
One possible plot could be that Naruto, using his unique skills and leadership, unites the various ninja clans under his banner to form an empire. He might introduce new forms of governance that combine ninja traditions with more democratic ideals, ensuring equality among all citizens regardless of their ninja abilities.
In the 'Harry Potter Space Empire Fanfiction', for the characters to adapt, they first need to accept the vastness of the space empire. Harry, having faced Voldemort, would draw on his experience of dealing with great evil when encountering new, powerful adversaries in space. Hermione would start researching about the different magical cultures across the empire, learning new spells and incantations unique to each planet. Ron would be the one to bridge the gap between the more studious characters and the more adventurous ones. He'd be out there making connections, while also relying on his friends' knowledge. They'd all have to re - think their understanding of magic, as the space environment might require new ways of casting spells, perhaps using starlight or the energy of black holes as magical sources.
The plot could start with Harry finding an ancient Jedi artifact during one of his adventures. This leads him to become curious about lightsabers. He then uses his magic knowledge to try and replicate it. Along the way, he might face opposition from some in the wizarding world who think it's too dangerous or against wizarding traditions. But Harry, being the hero he is, persists. Eventually, he creates a lightsaber and uses it to defeat a new, powerful dark wizard who has emerged, using both his wizarding skills and his new lightsaber skills.
In a fanfiction where Harry Potter creates a virus, perhaps it's a virus that affects magic itself. The virus could spread through spells and start to corrupt the very essence of magic. Harry, realizing the severity, might then have to team up with his old friends like Hermione and Ron. They would search for ancient magic or rare potions to counteract the virus before it destroys the entire magical ecosystem.