Not having read the 'black order novel' in question, it's hard to be certain. But it's common for there to be a protagonist who is somehow connected to the Black Order, either as a new recruit or someone who has a special relationship with it. There may also be antagonists who oppose the goals of the Black Order, and side characters who help or hinder the main characters in their journey.
Since I don't know the exact 'black order novel', I can't name the main characters. But generally, in a novel about an order, there might be a leader figure who is wise and powerful, guiding the members of the Black Order. There could also be a young and inexperienced member who has to learn the ropes and grows throughout the story.
Since I don't know the exact 'order 66 novel', it's difficult to say. But if it's a Star Wars - based one, it could have characters like Anakin Skywalker, as he played a crucial role in Order 66. There might also be Jedi like Obi - Wan Kenobi who were directly affected by it.
In the 'Black Ops Executive Order Story', the main characters might include the ones who initiate the executive orders. These could be the president or other top - level government leaders. Then there would be the operatives on the ground. They are the ones who are trained for stealth and combat in difficult situations. Special forces soldiers like Navy SEALs or Delta Force members could be among them. Also, intelligence analysts who gather the information necessary to plan and execute these black ops would be important characters. They all play different but interconnected roles in the complex web of a black ops story.
Since I don't have detailed knowledge about this specific 'Black Order a Sigma Force Novel', we can assume that there would be characters from the Sigma Force. They might be led by an experienced and resourceful commander. And on the side of the Black Order, there could be some shadowy and powerful antagonists.
Often, you'll find strong black leaders as main characters. These are individuals who are not afraid to stand up and make a change in the new world order. They might be community organizers or activists. Another type could be the ordinary black citizen who is suddenly thrust into extraordinary circumstances within this new world order and has to find their way. And there are also the wise elders, who hold the knowledge of the past and use it to guide the community in this new situation.
Since I don't know the exact 'the last order novel', I can't say for sure. But it could have a strong - willed protagonist who is tasked with carrying out the last order. There might also be an antagonist who tries to prevent the order from being fulfilled.
Since I have no prior knowledge of this novel, the main characters could be a group of adventurers. They might be brought together by the mystery of the lost order. Maybe there's a young and curious protagonist who is determined to solve the mystery of the lost order, and is accompanied by an older, wiser character who has some knowledge or connection to what the lost order might be about.
Since I don't know much about the 'the pale order novel', I can't say for sure who the main characters are. But they could be leaders within the pale order, or perhaps outsiders who become involved with the pale order in some way.
Since I don't know the exact 'fallen order novel', I can't say for sure. But it could have a protagonist who is a member of the fallen order, trying to make things right. There might also be a mentor - like figure who has some knowledge of the order's past and can guide the main character.
Rena Ryuugu is one of the main characters. She has a complex personality and is involved in many of the key events in the village. Keiichi Maebara is also important. He is a newcomer to the village and his presence seems to stir up some of the strange occurrences.
Since I haven't read it, I can't say for sure. But usually in such novels, there would be a protagonist who is either a new member of the order or someone trying to uncover the secrets of the order of the whills.