Urgent Power
Potential
Clearly Buffy is not what she used to be, she always had a high respect for human's life. When "she" killed the mayor's deputy in season three, and when she thought she killed Katrina, she took it real hard. Also, the things she told Faith after killing a human being, it showed how shaken up she was about it. And there are more examples.
But then in season 7, girls started getting killed. From Annabell, the first potential who died that she knew of, then Chloe, and then many other girls. So in episode 'Empty Places", she wanted back in, into another fight where more girls might die. But did she care at that point if these girls - humans, with souls - die? During this season, did she apologize? Did she lose her respect for human's life?
But then in season 7, girls started getting killed. From Annabell, the first potential who died that she knew of, then Chloe, and then many other girls. So in episode 'Empty Places", she wanted back in, into another fight where more girls might die. But did she care at that point if these girls - humans, with souls - die? During this season, did she apologize? Did she lose her respect for human's life?