Virtual actors in interactivated storytelling

In interactive storytelling, adaptability to user interactions tends to decrease plot quality. I will suggest here a framework for creating interactive stories out of traditional linear stories, such retaining original plot quality, and analyse the role of the virtual characters in the resulting stories. I argue that the faculty of involving the human participant in the social and emotional fabrics of the story are the essential requirements for virtual actors in this context, and that this can be achieved by providing the virtual actors with a repertoire of complex behaviour patterns.