I really like this concept; it's kinda fun and mind-blowing haha. Because I've always wondered about the Dawn details. Like we know she's made from Buffy and sent in the form of a sister but we never hear the specifics of HOW she was made from Buffy. I mean did they steal a clump of hair (hair again haha) and make magic DNA from it, or was it the slayer essence they used in which case is she would be "related" to both Buffy and Faith.
Also is she related to Joyce and Hank at all? Because from what little info we got, it seemed not....so that uts standing to the Buffy and Faith combo again.
And like people have said, her hair is totally different from both Buffy and Joyce (because I know Sarah was dying her hair, but it was always implied that Buffy was naturally blonde and we just had to ignore any roots!)....
Mind boggling!