Duty Calls Danger( Twilight Fanfic )

When Leena a 17 year old Archangle was sent down from Heaven by God himself to help out the Cullens and La Push Wolfpack take down an army including all evilness will she find love,friendship, or betrayal. Would she risk her life for one puny town or tons of lives that are to be taken by bloodthirsty crack head vampires.