I'm not sure as I haven't read the specific 'the secret novel story'. But usually, there are protagonists who drive the story forward and antagonists who create conflict.
The main characters are the seven members of the Secret 7 club.
There might be a female lead who is at the center of the secrets. For example, she could be a woman with a past she is trying to hide, and her actions and relationships are shaped by this need to keep things in secret.
As there is no information given about this story, it's impossible to say who the main characters are. They could be ordinary people with an extraordinary secret, or they could be fictional characters created for a specific plot.
Given the lack of context regarding the 'bastos secret secret story', we can only speculate about the main characters. If Bastos is a person, perhaps they are the central figure, and there could be friends, family members, or foes around them that are part of the story. Maybe there are also some mysterious figures that help or hinder Bastos in the discovery or protection of the secrets in the story.
The two main characters in 'Secret Window, Secret Garden' are Mort Rainey and John Shooter. Mort Rainey is a writer living his life when suddenly he is faced with this strange situation. John Shooter, who appears out of nowhere, is the catalyst for all the chaos in Mort's life. Mort is the character we follow through his psychological journey as he tries to figure out what's going on with Shooter's claims. Shooter is the mysterious and somewhat threatening figure that forces Mort to re - evaluate his own work and sanity.
In 'the secret billionaire novel', the main character is surely the secret billionaire. There may be a confidant, someone the billionaire trusts with their secret or at least part of it. There could also be antagonists, like those who are trying to expose the billionaire's secret for their own gain. Additionally, there might be ordinary people with whom the billionaire forms relationships, which are influenced by the hidden wealth.
I don't know the exact main characters as I haven't read the novel. But they could be scientists or adventurers.
Not having read 'the secret stealers a novel', it's tough to name the main characters. However, in a story about stealing secrets, we might expect to find a mastermind behind the secret - stealing operations. This could be a shadowy figure with a complex backstory and motives. Then there would likely be those who are affected by the stolen secrets, like victims or people whose lives are in danger because of the secrets being exposed. And of course, there could be characters who are on a quest to expose the secret stealers and bring them to justice.
I don't know as I haven't read the book. But it could be a family, like a mother, father and their children. Maybe there's also a friendly neighbor or a mysterious stranger who plays a crucial role.
Typically, there is the mother of the secret baby. She is a central figure as she holds the secret and has to deal with the consequences. There is also often a father figure, who may or may not be aware of the baby at first.