1. a pure spirit created by God; a being of heavenly residence, grace and intelligence.
2. a fallen celestial warrior employed by the Lord as the minister of His will.
3. the self-proclaimed Winchester guardian.
began when he, under God’s command—laid siege to Hell and rescued the Righteous Man from damnation. Fueled by doubt, he rebelled against his superiors, and fell from grace for the sake of humanity. .
& his current standing:
After successfully (?) averting the Apocalypse, Castiel has been spending most of his time in Locret's garden, occasionally turning up to spend time with his companions--or to collect objects of his interest. Very little is happening in his life--but (as much as he would like to return to Heaven) he's trying to adapt to his new home on earth.