Whoa, whoa, whoa...I am NOT understanding the concept of a "Potential Slayer". Buffy didn't know she was going to be a Slayer, so how do these girls know? How do their Watchers know? How did Kendra's family know she was going to be a Slayer? (I remember her saying they prepared her for this her entire life.)
What am I missing?
What am I missing?