Devas, or angels, are powerful entities from the higher planes, or Celestial Planes, such as Mount Celestia. They are of lawful good alignment. Trias, who can be found in Curst Prison, is an outcast deva. They appear to be human, but have wings sprouting from their shoulder blades, endowing them with flight.
As their alignment would indicate, devas are usually kind, compassionate and ready to protect those who need it. They are the alignment opposites of tanar'ri, valuing order and goodness above all.