Perhaps there is a middle - aged character who is going through a mid - life crisis. This person might be re - evaluating their life choices and relationships, which could be an interesting main character in the 'up in the air novel'. There could also be a mentor - like figure who helps guide the other characters through their challenges.
I'm not sure specifically without having read it, but it could be a young, ambitious person trying to make their mark in the world.
The main character is the corporate traveler who is in charge of firing people. There may also be some of the employees he interacts with during his travels as important characters in the story.
Without having read the 'masters of the air novel', it's hard to say exactly who the main characters are. However, given the title, they might be ace pilots. There could also be ground crew members or instructors who play important roles in the development of these 'masters of the air'. Maybe there are some characters who are not directly involved in flying but support the 'masters' in other ways, like family members who provide emotional support or military commanders who assign them missions.
Since I don't have the details of 'love in the air novel', it's difficult to name the exact main characters. But generally speaking, in this kind of romantic novel, the main characters are the ones whose love story drives the plot. They are likely to be individuals with unique personalities and backstories. Maybe one is a bit of a dreamer while the other is more practical, and their differences and similarities will be explored as their relationship unfolds.
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.
Since I haven't read 'A Mouthful of Air Novel', it's hard to name the exact main characters. However, often in novels, the main characters are the ones with the most complex storylines. They could be a protagonist who is on a journey of some sort, maybe a personal or emotional journey. There might also be supporting characters that interact with the main character and help to develop the story further, like a friend, a family member or an antagonist who creates conflict.
I'm not sure as I haven't read the novel specifically. But they could be pilots, aircrew members, or military commanders involved in the air war.
In the 'Jane Eyre' novel, the main character is Jane Eyre herself. She is a strong, intelligent and independent woman. Another important character is Mr. Rochester, the master of Thornfield Hall where Jane works as a governess. There is also Mrs. Fairfax, the housekeeper at Thornfield Hall.
I'm sorry, without reading the 'Romance is in the Air Novel', it's difficult to say who the main characters are. However, in a typical romance novel, they could be a man and a woman from different walks of life. Maybe a hard - working artist and a businessperson who meet by chance and their lives get intertwined.
In 'into thin air novel', there are several key characters. There are the professional mountaineers who have years of climbing experience and are leading the expedition. Then there are the less - experienced climbers who are also part of the group. These characters all have different motives for climbing Everest. Some are in it for the pure thrill of the conquest, while others might be trying to prove something to themselves or the world. Their personalities and backgrounds play a big role in how they interact with each other during the climb and how they respond to the various challenges they face on the mountain.
They could be characters that have some special connection to air and darkness. Maybe there is a character who can manipulate air in some way, like a wizard or a person with special powers. And there could be another character who is associated with darkness, perhaps a villain or someone with a mysterious past that is related to the element of darkness. However, without reading the novel, this is just speculation.