Bad Angel, Worse Angel or Good Angel, Better Angel.
Double Subverted: But the angel character fights back.
Deconstructed: Alice actually has a mental disorder. When she tells her family that there is an angel and a devil telling her what to do, the family gets worried and puts her on medication.
Reconstructed: Alice is actually getting counseling from her parents. She just happens to think of her mother as an angel and her father as a devil or vice versa.
Parodied: The appearance of the angels is set up like the beginning of a wrestling or boxing match: "In this corner, from the Superego, representing virtue and selflessness, Angelica! And her opponent, from the Id, representing vice and selfishness, Diabolica!" *ding, ding!*
The ensuing battle sets Alice's head on fire and she runs away screaming.
The two characters' fighting literally gives Alice a headache.
The only character to appear is Diabolica. (Angelica is duct taped to a chair.)
Diabolica raises a valid point, and Angelica takes her side.
Or, alternatively, Angelica raises a valid point, and since Even Evil Has Standards, Diabolica sides with her.
Lampshaded: "Hey Angel, Devil, what advice do you have for me?"
Averted: No conceptual representations of conscience appear on Alice's shoulder or anywhere else.