Whose story is this anyway?

For reasons I am not going in to I was wondering who people thought was the main character of the Saga of Mystics. It is, of course, like asking who the main character is in Game of Thrones or The Walking Dead. But, still, help me out! Who do you think is the driving narrative character behind the story. (for instance in The Walking Dead, there are many people who believe it is Rick Grimes' story, while many others believe it is the narrative of Carl Grimes, about his father). Which character drives this narrative?