Typically, the main characters would be Sora and Shiro, just like in the main 'No Game No Life' story. They are likely to be involved in the side stories as well, using their wits and gaming skills.
I'm not sure as we don't have enough information. But it could be the safari guide who leads the players through the game world.
There could be characters that were introduced briefly in the main 'Life Is Strange' game but are now the focus. Maybe it's Chloe's friend from school who has their own story to tell.
The main characters are Tony and Maria. Tony is a member of the Jets gang, and Maria is related to the Sharks gang. Their love is the central focus of the story.
I'm not entirely sure who the main characters are in the side story. It could be some characters who were secondary in the main Life Is Strange 2 but get more focus here.
The main characters are Sora and Shiro. They are siblings who are like a gaming duo. Sora is the older brother, and he is very intelligent and good at strategizing in games.
In 'west side side story', Tony is a key character. He is part of the Jets gang. Then there's Maria, a beautiful young woman who is Bernardo's sister. Bernardo is the head of the Sharks gang. And Riff, as the leader of the Jets, plays an important role in fueling the gang rivalry. Their actions and relationships drive the whole story forward.
I don't know for sure as I haven't read the story. But it could be the cheerleader themselves as the main character. There might also be the people they are cheering for or inspiring, like their friends, family, or colleagues.
Since I don't know the game well, I can't name the main characters. But they could be ordinary people thrown into extraordinary situations within the 13 - day time frame.
Since we don't really know the details of 'the good life game story', the main characters could be diverse. They might be characters with different skills and personalities. For instance, there could be a creative character who is good at art and design in the game world, and another character who is more into physical activities like sports or exploration. Or perhaps there are characters representing different generations, like a young and ambitious character and an older, wiser one.
There are often new characters introduced in side stories. For example, Dunk and Egg are significant ones. Dunk is a hedge knight with his own code of honor, and Egg is actually Aegon V Targaryen in disguise. Their adventures in the side story add more depth to the complex world of Westeros, showing different aspects of chivalry, power struggles, and the life of the common folk compared to the main series.