The Exile story line focuses on Benson and Eva. The Damned revolves mainly around the experiences of various recruits prior to their arrival at one of the two training camps. And Vultures explores the characters of Valasquez, Cordo, Blascovitch and Markham.

The upshot of having set these constraints for the story lines is that some characters only appear in some story lines. Therefore Fabien, Rebel and all Consortium characters are only in The Cycle of Shadows.  Benson and Eva are only in Exile and The Cycle of Shadows, while Valasquez and Cordo are only present in The Cycle of Shadows and Vultures.