According to The Lesser Key of Solomon, Andras is a Great Marquis of Hell, depicted as a man with a winged angel's body and the head of an owl or raven, riding upon a strong black wolf and wielding a sharp and bright sword. He sows discord among people. He's considered to be a highly dangerous demon, who could kill the conjuring magician and his assistants if precautions were not taken. A misstep outside the magical protective circle could mean instant death for the conjurer, and Andras was always trying to lure them out.
Andras was also believed to be very skilled in using people's own anger against them, being able of infecting humans with uncontrollable dooming rage. For this reason he was allegedly summoned quite often by military leaders, to use his abilities to incite wars that last for decades, redefining peoples and continents. In addition, due to the subtle nature of his work, Andras was supposedly extremely difficult to detect.