Obviously, Harry Potter is one of the main characters as the title implies. He would be leading the army. His friends like Ron and Hermione would most likely be involved too, providing support and their own unique skills.
The members of the army themselves could be considered main characters in a sense. Each one might have their own backstory, motivation for joining the army, and a role to play in the battles or missions that the army undertakes. Their individual growth and development throughout the fanfiction could be an important part of the story.
Well, it could be a group of ordinary Muggles who rise to be leaders in the Muggle Army. Maybe there's a tech - savvy Muggle named Tom who uses his knowledge of electronics to find ways to detect magic. He could be one of the main characters.
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.
Obviously, Harry Potter would be one of the main characters since it's in the title. There might also be his friends like Ron and Hermione. They could be involved in helping Harry understand and control his newfound claw - related abilities.
Obviously, Harry Potter is one of the main characters. He's the father of the triplets. Hermione and Ron would probably also be important characters, as they are Harry's closest friends and would likely be involved in the triplets' lives, perhaps as godparents or just as trusted advisors.
There could be his drill sergeant. A tough but fair character who pushes Harry to his limits. Maybe he has a name like Sergeant Thompson.
Maybe a new character, a Muggle - born wizard who was shunned by both the Muggle and wizarding worlds. This character, out of bitterness, decides to combine Muggle technology and magic to create the droid army and rule over both worlds. He would see Harry Potter and his friends as the main obstacles to his grand plan.
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.
In some fanfictions, there could be new characters introduced specifically for the plot related to Harry's enhanced senses. For instance, a wise old wizard who has knowledge about this rare magical phenomenon and guides Harry through it. There might also be antagonists who are either threatened by Harry's new powers or are trying to use them for their own evil purposes.
In this fanfiction, Harry Potter is the main character with the Triforce of Power. However, we can't forget about the Hogwarts professors. They could play crucial roles in helping Harry understand the implications of this power. Neville Longbottom might also have a part to play, perhaps as a support to Harry or someone who is also affected by the presence of this new power in the wizarding world. And of course, the Death Eaters would be important antagonists as they would either be after Harry's new power or be threatened by it.
Harry Potter is the central figure, of course. The rare familiar, say it's a spectral stag or something, would play a major role too. Other important characters could be the Hogwarts professors. Dumbledore might have some knowledge about the rare familiar and guide Harry in understanding it. Snape could be suspicious or intrigued by this new addition to Harry's life. And then there are Harry's classmates, some of whom might be afraid of the rare familiar while others are in awe.