I'm not sure who the main characters are without reading the novel. It could be a group of friends who have different personalities and backgrounds.
Maybe there is a protagonist who is in the process of making new friends and also dealing with various strangers. This character might be on a journey of some sort, either a physical journey or an emotional one, and through this journey, they interact with different people who become important characters in the story.
Since I don't know the specific 'the strangers novel', I can't say for sure. But they could be the strangers themselves, perhaps a detective trying to figure them out, or the people whose lives are affected by the strangers.
I'm sorry, without reading the novel, I can't tell who the main characters are.
The two main characters are Guy Haines and Bruno Anthony. Guy is a tennis player who has some personal and professional issues. Bruno is a rather strange and unpredictable man. Their encounter on the train sets the whole story in motion.
There are the nine strangers of course. But there is also the person who runs the retreat as a main character. Each of the nine has their own identity and backstory that makes them unique in the story.
The main theme could be about relationships. It might explore the different types of relationships between friends and strangers, like how they interact, misunderstand, or come to understand each other.
Since I don't know the details of 'the strangers story', I can't say for sure who the main characters are.
Katchoo is one of the main characters. She is a complex and strong - willed woman. David is also important. Their relationship forms a major part of the story's core. Francine is another key character, and her interactions with Katchoo and David add depth to the overall narrative.
Since I haven't read it, it's hard to say exactly. However, it might have a protagonist who is on a journey of some sort, perhaps a traveler who meets various people during their travels. There could also be a character who is more of an observer, watching the interactions between others and learning from them. Maybe there's a group of friends who are going through some kind of change in their relationship which makes them seem like strangers to each other at times.
In many light novels, there are often sidekick characters too. So in 'demons and strangers light novel', there could be a loyal friend of the main stranger, who is witty and provides some comic relief while also being helpful in battles or in deciphering the mysteries in the story. And there may be a demon who is an outcast from his own kind and ends up helping the strangers for some reason, adding more depth to the character lineup.
I'm not sure specifically as I haven't read it. But it could be a protagonist who is on a journey of self - discovery and uses talking to strangers as a means to that end. Maybe there's a character who is initially shy but gradually becomes more open through these interactions.