There could be a variety of main characters. It might be a young adventurer who stumbles upon the castle in a different time. There could also be an old wizard who has some connection to the castle's past and present in that time. And perhaps a damsel in distress who is trapped in the castle during a particular time period in the story.
In the 'castle in the time novel', the main characters could be those who have a special relationship with the castle in the given time frame. It could be an archaeologist from the modern day who travels back in time to study the castle. Or it could be a group of rebels in the past who use the castle as their base. Another possibility is a time - traveler from the future who comes to the castle to change something in the past, and all these characters' actions and interactions would form the core of the story.
Since I don't know the specific 'castle in the time novel', it's hard to say. But they could be the lord or lady of the castle, a brave knight, or a clever servant.
I'm not sure as the specific 'the castle novel' isn't clearly defined. But generally, there could be a lord or lady who owns the castle. They would be in charge of the castle's affairs and the people living within its walls.
I'm not aware of the particular 'castle in the air novel' you mentioned. But likely, the main characters would be individuals who are either trying to build their 'castle in the air' or are caught up in the allure of someone else's. It could be a group of adventurers who set out on a quest based on a far - fetched prophecy, believing they can achieve the impossible. Or it could be a lonely figure who has an elaborate vision of a different life and is struggling to make it a reality.
Jeannette Walls is central. She tells the story of her family. Rex Walls, her father, who has big plans but fails to fulfill most of them. Rose Mary Walls, the mother, is a free - spirit. And the siblings play important roles too. Lori is the eldest sister, Brian is the brother, and Maureen is the youngest sister. They all experience the family's ups and downs together.
I'm not sure as I haven't read it, but perhaps there are noblewomen who are in charge of the castle's affairs.
Maybe there's a princess who is a main character in 'castle story'. She could be the one in need of rescue or the one who holds the key to some mystery within the castle. There might also be an evil wizard or a cunning thief as main characters, depending on the nature of the story.
There are several important characters. Robert Childan is one of them. He's a dealer in antiques, and through his business, we see different aspects of the society under the Axis rule. Another main character is Nobusuke Tagomi. As a Japanese official, he has a unique perspective on the power dynamics and the cultural clashes in this world. Juliana Crain is also crucial as she becomes a key figure in the search for the truth and in the resistance against the oppressive regime.
I don't know specifically who the main characters are in 'gauken castle visual novel' as I haven't read it. But they could be a young adventurer exploring the castle, a noble who owns the castle, or a mysterious figure guarding its secrets.
Juliana Crain is a main character. She is brave and curious, which leads her to get caught up in the web of events. She is often on the run and trying to figure out the truth behind the world she lives in.
The main character is Cassandra Mortmain. She is the narrator of the story and a young girl coming of age. Then there's her sister Rose. Her father, James Mortmain, is also an important character, a once - famous writer who has become reclusive.
Perhaps there is a group of misfits as the main characters. They could be outcasts who have found a home in the castle waiting. Each of them might have their own backstory and skills, and together they form an interesting dynamic within the walls of the castle. This would make for a diverse and engaging set of main characters.