Basically , Gabriel was " He Who Walks Behind The Rows "(or atleast The Deitys latest vessel) , Hannah was prophesied as " First Daughter " to carry The Deitys " seed " , Gabriel/HWWBTR killed Isaac for betraying him twice & " castrating (his) words " , Hannah & Rachel realized that Isaac was actually inadvertantly protecting Hannah from " He Who Walks Behind The Rows " by twisting The Prophecy , Rachel set off a bomb killing her & seemingly Gabriel after telling Hannah to run & leave Gatlin forever , Gabriel survived The Blast & chuckled to himself & Hannah narrates The End , saying she fled Gatlin & left The Followers Of " He Who Walks Behind The Rows " behind her & that while she doesnt know what The Future holds for her & her baby , for The First Time In A Long Time , she is truly happy . So , its left ambiguous whether:
A.Hannah is happy to finally be free of " He Who Walks Behind The Rows ".
OR
B.She is slowly falling under The Deity`s influence .