Fallen Angels

Name	Lucifer Anna Milton
Actor	Various
Dates	Created before Humans but fell after the creation of humanity
Location	No fixed address
Occupation	Archangels and Angels
Episode(s)	Season 4 and Season 5

In Christian tradition a fallen angel is one who is banished from Heaven.

Disobedient Angels

It's difficult to distinguish between a 'fallen' and a 'rebellious' angel in Supernatural. Fallen Angels are those that have defied Heaven's principles and laws, and leave The Host of Heaven permanently. They may be cast out or may leave on their own.

Rebellious angels are those that have questioned or disobeyed orders from their superiors, in particular Michael. They may have created a more personal and individualized agenda. These angels may experience a demotion from their original ranks in the angel hierarchy, and would then be placed in a lower angelic class. True rebellion, meaning outright disobedience, is considered an angelic "murder one" according to Anna. It is closely associated with falling, and can occur for a variety of reasons.

Fallen Angels

Lucifer was expelled from Heaven by God and eventually cast into Hell by Michael.

Anna chose to relinquish her grace which rendered her mortal.

Rebellious Angels

Castiel was later placed under Uriel's command by his superiors. Castiel's rebellion officially starts when he banishes Zachariah and takes Dean Winchester to stop Sam from killing Lilith.

Uriel supported the release of Lucifer but this was seemingly overlooked by his superiors.

Gabriel voluntarily exiles himself from Heaven and retreats to Earth.