Claire Novak

Background

Claire Novak is the only daughter of Jimmy and Amelia Novak and has Jimmy's bloodline in her making her a vessel for Castiel

The Rapture

A year after her father went missing Claire and her mother missed him and knew he wasn't alright despite the fact that her mother claimed he was ill Amelia admitted she loved him, Unfortunately her mother was possessed and killed and desperate to save her father Claire allowed Castiel to to take her as a vessel.

After Castiel reautuned to her father's body Castiel put a enochanian sigil on her and left and promised her he would take care of her father

In The episode Two Minutes to Midnight Claire has been put in protection by the angels