Externica: Every character has his and her own scenario. There's no interaction from the other characters. Well, aside from Ted who meets Ellen in his scenario. But the Ellen Ted meets is an artificial creation from AM and, no, this is no spoiler. It's pretty obvious she is.

Also, every scenasrio is pretty much on the short side. And tells a story on its own.
The final scenario, however, is all playable characters working together.