I'm not sure exactly who the main characters are without reading the book. But usually, there are characters whose lives are most closely followed and whose stories are central to the themes of the collection.
There could be their husbands as well, even if they are somewhat in the background, as their presence is crucial to the whole concept of the wives cheating. Maybe there are also some friends or confidants of the wives who play important roles in the story.
In 'The Secret Sharer', the captain is a main character. He is the one who has the encounter with Leggatt, the secret sharer. There are also the crew members on the ship, who play important roles in the overall atmosphere of the story.
Perhaps there's a family member, like a grandparent, who tells stories about the secret pool. And then there could be a child who is curious and sets out to uncover the truth about the pool. There might also be a local who warns the characters about the pool for some reason.
The four wives are surely the main characters. They are the focus as the title implies.
I'm not sure exactly who the main characters are without more information about 'The Secret Stories'. But usually in such stories, there could be a curious protagonist, someone who is eager to uncover the secrets.
One interesting story might be about the secrets people keep within a small community. It could show how these secrets affect relationships and the overall dynamic of the place.
Maybe an old wise figure, like an old man or woman who knows the secrets behind the door or has some knowledge about the events in the other stories. They could guide the younger characters or be a source of mystery themselves. For example, they might have a past connection to the secret door that is gradually revealed throughout the stories.
It's hard to say without reading it, but they might be adventurers seeking the secrets in the book.
Often, the main character is an animal - lover. For example, a lonely old man who lives alone and finds comfort in secretly feeding the squirrels in the park. He becomes like a guardian for the squirrels.
I'm not sure specifically as the title doesn't give clear indication. But they could be ordinary people who are thrust into extraordinary situations where they encounter the secret miracles.