Some main characters are outsiders. They don't quite fit into the normal social or cultural norms of the world they inhabit. They might be misfits in a highly technological society, trying to find their place among the algorithms and machines.
They are often complex individuals. Many are introspective, constantly reflecting on their own lives and the world around them. For instance, some characters might be scientists or technicians who are dealing with the moral implications of their work while also facing personal crises.