Angel with a shotgun.

Thalia Winchester the little sister of Sam and Dean Winchester. She had a normal life, well as normal as you can get when you come from a family of hunters.
Thalia grew up with her adopted dad, Bobby Singer. She goes to school, and has friends. But she also has a guardian angel named Tyler.
Tyler the son of Gabriel and the nephew of Castiel. He is a archangel and is protecting Thalia.
A enemy. A old enemy. Has risen and is coming back for Thalia. Can her brothers and guardian angel save her?