From The Grey House:
Natalia thought of forming a group with people like Dean. People that had lost family to vampires in the area, but who didn’t hear the voices. She felt they were more able to see that not all the vampires and creatures of the shadows had to die. Dean was still too close to the death of his family though. He was convinced that the angels would talk to him one day. Natalia almost hoped not. Slayers only saw black and white, good and evil. The world wasn’t that simple.