She was NOT an angel. Instead, she just packed a bag, and left for her own section of Earth without saying good bye to everyone. And the Kara that Lee was talking to? Just a figment of Lee's imagination.
How horrendously cheesy was that robot epilogue? And Angel Balter going "He doesn't like to be called that?
ARGH!
Edited to make my sentences make sense as I was so incoherent with frustration.